├── .gitignore ├── LICENSE ├── README.md ├── dist ├── featherScroll.esm.js ├── featherScroll.esm.js.map ├── featherScroll.min.js └── featherScroll.min.js.map ├── package.json └── src └── featherScroll.js /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | demo/ 3 | rollup.config.js 4 | package-lock.json 5 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2025 Ranvijay Raj 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in 13 | all copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21 | THE SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # FeatherScroll 2 | 3 | FeatherScroll is a lightweight, smooth scrolling library designed for full device support and easy integration. It provides advanced scrolling features such as parallax effects, sticky elements, and smooth animations without requiring additional dependencies. 4 | 5 | ## 🚀 Features 6 | 7 | - **Smooth Scrolling:** Automatically enables smooth scrolling when included. 8 | - **Supports Multiple Scrollable Areas:** Works with multiple content sections on a single page. 9 | - **Parallax Scrolling:** Apply horizontal and vertical scroll effects. 10 | - **Sticky Elements:** Keep elements fixed within their parent while scrolling. 11 | - **Scroll Direction Detection:** Identify whether the user is scrolling up or down. 12 | - **Fully Configurable:** Customize scroll speed, easing, and gestures. 13 | - **Integration with GSAP ScrollTrigger:** Seamless compatibility for advanced animations. 14 | 15 | --- 16 | 17 | ## 📦 Installation 18 | 19 | ### **Using npm** 20 | 21 | To install FeatherScroll via npm, run the following command: 22 | 23 | ```bash 24 | npm install scrollfeather 25 | ``` 26 | 27 | Then import it in your JavaScript: 28 | 29 | ```js 30 | import FeatherScroll from 'scrollfeather'; 31 | 32 | const scroll = new FeatherScroll(); 33 | ``` 34 | 35 | ### **Using JSDelivr (CDN)** 36 | 37 | You can also include FeatherScroll directly via CDN in your HTML: 38 | 39 | ```html 40 | 41 | ``` 42 | 43 | Once included, FeatherScroll is available globally as `FeatherScroll`: 44 | 45 | ```js 46 | const scroll = new FeatherScroll(); 47 | ``` 48 | --- 49 | 50 | ## 🛠️ Basic Usage 51 | 52 | ### **1️⃣ Include FeatherScroll in Your Project** 53 | 54 | ```html 55 | 56 | ``` 57 | 58 | ### **2️⃣ Initialize FeatherScroll** 59 | 60 | Feather Scroll doesn't need any extra options for basic smooth scrolling initialization 61 | 62 | ```js 63 | const scroll = new FeatherScroll(); 64 | ``` 65 | 66 | --- 67 | 68 | ## ⚙️ Options 69 | 70 | You can customize FeatherScroll with various options: 71 | 72 | ```js 73 | const scroll = new FeatherScroll({ 74 | smooth: true, // Enable smooth scrolling 75 | duration: 1.2, // Scroll duration (seconds) 76 | easing: (t) => 1 - Math.pow(1 - t, 3), // Easing function 77 | direction: 'vertical', // 'vertical' | 'horizontal' 78 | gestureDirection: 'both', // Mouse/touch gesture control 79 | mouseSensitivity: 1, // Sensitivity for wheel scrolling 80 | touchSensitivity: 2, // Sensitivity for touch scrolling 81 | infinite: false // Infinite scrolling 82 | }); 83 | ``` 84 | 85 | --- 86 | 87 | ## 📌 Sticky Elements 88 | 89 | To make an element sticky within its parent, add the `data-scroll-sticky` attribute: 90 | 91 | ```html 92 |
93 |
I'm a sticky element!
94 |
95 | ``` 96 | 97 | The element will remain fixed inside its parent container while scrolling. 98 | 99 | --- 100 | 101 | ## 🎭 Parallax Scrolling 102 | 103 | Apply a **scroll speed effect** using `data-scroll-speed`: 104 | 105 | ```html 106 |
This moves slower.
107 |
This moves faster.
108 | ``` 109 | 110 | Apply **horizontal scrolling** using `data-scroll-direction="horizontal"`: 111 | 112 | ```html 113 |
This moves sideways.
114 | ``` 115 | 116 | You can combine both: 117 | 118 | ```html 119 |
Moves in diagonally!
120 | ``` 121 | 122 | --- 123 | 124 | ## 🔄 Scroll Direction Detection 125 | 126 | You can detect whether the user is scrolling up or down using an event listener: 127 | 128 | ```js 129 | document.addEventListener('scroll', () => { 130 | const direction = scroll.getScrollDirection(); 131 | console.log(`Scrolling ${direction}`); 132 | }); 133 | ``` 134 | 135 | This will return `'up'` or `'down'` based on the user's scroll behavior. 136 | 137 | --- 138 | 139 | ## 🎯 Scroll to Specific Section 140 | 141 | You can scroll to any element or position programmatically: 142 | 143 | ```js 144 | scroll.scrollTo('#section', { offset: -50, duration: 1 }); 145 | ``` 146 | 147 | --- 148 | 149 | ## 🎬 GSAP ScrollTrigger Integration 150 | 151 | If GSAP ScrollTrigger is included, FeatherScroll will automatically sync with it 152 | 153 | The below code is useful when you have set a custom scroll container: 154 | 155 | ```js 156 | ScrollTrigger.defaults({ scroller: scroll.wrapper }); 157 | //scroll is the variable in which FeatherScroll is initialized 158 | ``` 159 | 160 | --- 161 | 162 | ## 🛑 Controlling Scroll Behavior 163 | 164 | ### **Start or Stop Smooth Scrolling** 165 | 166 | ```js 167 | scroll.start(); // Enable smooth scrolling 168 | scroll.stop(); // Disable smooth scrolling 169 | ``` 170 | 171 | ### **Destroy FeatherScroll** 172 | 173 | ```js 174 | scroll.destroy(); 175 | ``` 176 | 177 | --- 178 | 179 | ## 🛠️ Updating Options Dynamically 180 | 181 | You can update the scroll options dynamically: 182 | 183 | ```js 184 | scroll.updateOptions({ duration: 2, smooth: false }); 185 | ``` 186 | 187 | This allows you to modify scroll settings without reinitializing the instance. 188 | 189 | --- 190 | 191 | ## 🌍 Supporting Multiple Scroll Instances 192 | 193 | FeatherScroll supports multiple scrolling areas: 194 | 195 | ```js 196 | const scroll1 = new FeatherScroll({ wrapper: '.container1', content: '.content1' }); 197 | const scroll2 = new FeatherScroll({ wrapper: '.container2', content: '.content2' }); 198 | ``` 199 | 200 | --- 201 | 202 | ## 📜 License 203 | 204 | FeatherScroll is open-source under the [MIT License](LICENSE). 205 | 206 | --- 207 | 208 | ## 🤝 Contributing 209 | 210 | If you want to contribute, feel free to submit pull requests on [GitHub](https://github.com/yourusername/featherscroll). 211 | 212 | --- 213 | 214 | ## ❤️ Support FeatherScroll 215 | 216 | If you find FeatherScroll useful and would like to support its development, consider donating: 217 | 218 | - **PayPal:** [@RanvijayRaj7](https://www.paypal.me/RanvijayRaj7) 219 | - **UPI:** gamersuraj720@okhdfcbank 220 | 221 | Your support helps keep this project alive and improving! 🚀 222 | 223 | --- 224 | ## 📧 Need Help? 225 | 226 | For questions or issues, create a GitHub issue or reach out to me! 227 | 228 | -------------------------------------------------------------------------------- /dist/featherScroll.esm.js: -------------------------------------------------------------------------------- 1 | // package.json 2 | var version = "1.3.1"; 3 | 4 | // packages/core/src/maths.ts 5 | function clamp(min, input, max) { 6 | return Math.max(min, Math.min(input, max)); 7 | } 8 | function lerp(x, y, t) { 9 | return (1 - t) * x + t * y; 10 | } 11 | function damp(x, y, lambda, deltaTime) { 12 | return lerp(x, y, 1 - Math.exp(-lambda * deltaTime)); 13 | } 14 | function modulo(n, d) { 15 | return (n % d + d) % d; 16 | } 17 | 18 | // packages/core/src/animate.ts 19 | var Animate = class { 20 | isRunning = false; 21 | value = 0; 22 | from = 0; 23 | to = 0; 24 | currentTime = 0; 25 | // These are instanciated in the fromTo method 26 | lerp; 27 | duration; 28 | easing; 29 | onUpdate; 30 | /** 31 | * Advance the animation by the given delta time 32 | * 33 | * @param deltaTime - The time in seconds to advance the animation 34 | */ 35 | advance(deltaTime) { 36 | if (!this.isRunning) return; 37 | let completed = false; 38 | if (this.duration && this.easing) { 39 | this.currentTime += deltaTime; 40 | const linearProgress = clamp(0, this.currentTime / this.duration, 1); 41 | completed = linearProgress >= 1; 42 | const easedProgress = completed ? 1 : this.easing(linearProgress); 43 | this.value = this.from + (this.to - this.from) * easedProgress; 44 | } else if (this.lerp) { 45 | this.value = damp(this.value, this.to, this.lerp * 60, deltaTime); 46 | if (Math.round(this.value) === this.to) { 47 | this.value = this.to; 48 | completed = true; 49 | } 50 | } else { 51 | this.value = this.to; 52 | completed = true; 53 | } 54 | if (completed) { 55 | this.stop(); 56 | } 57 | this.onUpdate?.(this.value, completed); 58 | } 59 | /** Stop the animation */ 60 | stop() { 61 | this.isRunning = false; 62 | } 63 | /** 64 | * Set up the animation from a starting value to an ending value 65 | * with optional parameters for lerping, duration, easing, and onUpdate callback 66 | * 67 | * @param from - The starting value 68 | * @param to - The ending value 69 | * @param options - Options for the animation 70 | */ 71 | fromTo(from, to, { lerp: lerp2, duration, easing, onStart, onUpdate }) { 72 | this.from = this.value = from; 73 | this.to = to; 74 | this.lerp = lerp2; 75 | this.duration = duration; 76 | this.easing = easing; 77 | this.currentTime = 0; 78 | this.isRunning = true; 79 | onStart?.(); 80 | this.onUpdate = onUpdate; 81 | } 82 | }; 83 | 84 | // packages/core/src/debounce.ts 85 | function debounce(callback, delay) { 86 | let timer; 87 | return function(...args) { 88 | let context = this; 89 | clearTimeout(timer); 90 | timer = setTimeout(() => { 91 | timer = void 0; 92 | callback.apply(context, args); 93 | }, delay); 94 | }; 95 | } 96 | 97 | // packages/core/src/dimensions.ts 98 | var Dimensions = class { 99 | constructor(wrapper, content, { autoResize = true, debounce: debounceValue = 250 } = {}) { 100 | this.wrapper = wrapper; 101 | this.content = content; 102 | if (autoResize) { 103 | this.debouncedResize = debounce(this.resize, debounceValue); 104 | if (this.wrapper instanceof Window) { 105 | window.addEventListener("resize", this.debouncedResize, false); 106 | } else { 107 | this.wrapperResizeObserver = new ResizeObserver(this.debouncedResize); 108 | this.wrapperResizeObserver.observe(this.wrapper); 109 | } 110 | this.contentResizeObserver = new ResizeObserver(this.debouncedResize); 111 | this.contentResizeObserver.observe(this.content); 112 | } 113 | this.resize(); 114 | } 115 | width = 0; 116 | height = 0; 117 | scrollHeight = 0; 118 | scrollWidth = 0; 119 | // These are instanciated in the constructor as they need information from the options 120 | debouncedResize; 121 | wrapperResizeObserver; 122 | contentResizeObserver; 123 | destroy() { 124 | this.wrapperResizeObserver?.disconnect(); 125 | this.contentResizeObserver?.disconnect(); 126 | if (this.wrapper === window && this.debouncedResize) { 127 | window.removeEventListener("resize", this.debouncedResize, false); 128 | } 129 | } 130 | resize = () => { 131 | this.onWrapperResize(); 132 | this.onContentResize(); 133 | }; 134 | onWrapperResize = () => { 135 | if (this.wrapper instanceof Window) { 136 | this.width = window.innerWidth; 137 | this.height = window.innerHeight; 138 | } else { 139 | this.width = this.wrapper.clientWidth; 140 | this.height = this.wrapper.clientHeight; 141 | } 142 | }; 143 | onContentResize = () => { 144 | if (this.wrapper instanceof Window) { 145 | this.scrollHeight = this.content.scrollHeight; 146 | this.scrollWidth = this.content.scrollWidth; 147 | } else { 148 | this.scrollHeight = this.wrapper.scrollHeight; 149 | this.scrollWidth = this.wrapper.scrollWidth; 150 | } 151 | }; 152 | get limit() { 153 | return { 154 | x: this.scrollWidth - this.width, 155 | y: this.scrollHeight - this.height 156 | }; 157 | } 158 | }; 159 | 160 | // packages/core/src/emitter.ts 161 | var Emitter = class { 162 | events = {}; 163 | /** 164 | * Emit an event with the given data 165 | * @param event Event name 166 | * @param args Data to pass to the event handlers 167 | */ 168 | emit(event, ...args) { 169 | let callbacks = this.events[event] || []; 170 | for (let i = 0, length = callbacks.length; i < length; i++) { 171 | callbacks[i]?.(...args); 172 | } 173 | } 174 | /** 175 | * Add a callback to the event 176 | * @param event Event name 177 | * @param cb Callback function 178 | * @returns Unsubscribe function 179 | */ 180 | on(event, cb) { 181 | this.events[event]?.push(cb) || (this.events[event] = [cb]); 182 | return () => { 183 | this.events[event] = this.events[event]?.filter((i) => cb !== i); 184 | }; 185 | } 186 | /** 187 | * Remove a callback from the event 188 | * @param event Event name 189 | * @param callback Callback function 190 | */ 191 | off(event, callback) { 192 | this.events[event] = this.events[event]?.filter((i) => callback !== i); 193 | } 194 | /** 195 | * Remove all event listeners and clean up 196 | */ 197 | destroy() { 198 | this.events = {}; 199 | } 200 | }; 201 | 202 | // packages/core/src/virtual-scroll.ts 203 | var LINE_HEIGHT = 100 / 6; 204 | var listenerOptions = { passive: false }; 205 | var VirtualScroll = class { 206 | constructor(element, options = { wheelMultiplier: 1, touchMultiplier: 1 }) { 207 | this.element = element; 208 | this.options = options; 209 | window.addEventListener("resize", this.onWindowResize, false); 210 | this.onWindowResize(); 211 | this.element.addEventListener("wheel", this.onWheel, listenerOptions); 212 | this.element.addEventListener( 213 | "touchstart", 214 | this.onTouchStart, 215 | listenerOptions 216 | ); 217 | this.element.addEventListener( 218 | "touchmove", 219 | this.onTouchMove, 220 | listenerOptions 221 | ); 222 | this.element.addEventListener("touchend", this.onTouchEnd, listenerOptions); 223 | } 224 | touchStart = { 225 | x: 0, 226 | y: 0 227 | }; 228 | lastDelta = { 229 | x: 0, 230 | y: 0 231 | }; 232 | window = { 233 | width: 0, 234 | height: 0 235 | }; 236 | emitter = new Emitter(); 237 | /** 238 | * Add an event listener for the given event and callback 239 | * 240 | * @param event Event name 241 | * @param callback Callback function 242 | */ 243 | on(event, callback) { 244 | return this.emitter.on(event, callback); 245 | } 246 | /** Remove all event listeners and clean up */ 247 | destroy() { 248 | this.emitter.destroy(); 249 | window.removeEventListener("resize", this.onWindowResize, false); 250 | this.element.removeEventListener("wheel", this.onWheel, listenerOptions); 251 | this.element.removeEventListener( 252 | "touchstart", 253 | this.onTouchStart, 254 | listenerOptions 255 | ); 256 | this.element.removeEventListener( 257 | "touchmove", 258 | this.onTouchMove, 259 | listenerOptions 260 | ); 261 | this.element.removeEventListener( 262 | "touchend", 263 | this.onTouchEnd, 264 | listenerOptions 265 | ); 266 | } 267 | /** 268 | * Event handler for 'touchstart' event 269 | * 270 | * @param event Touch event 271 | */ 272 | onTouchStart = (event) => { 273 | const { clientX, clientY } = event.targetTouches ? event.targetTouches[0] : event; 274 | this.touchStart.x = clientX; 275 | this.touchStart.y = clientY; 276 | this.lastDelta = { 277 | x: 0, 278 | y: 0 279 | }; 280 | this.emitter.emit("scroll", { 281 | deltaX: 0, 282 | deltaY: 0, 283 | event 284 | }); 285 | }; 286 | /** Event handler for 'touchmove' event */ 287 | onTouchMove = (event) => { 288 | const { clientX, clientY } = event.targetTouches ? event.targetTouches[0] : event; 289 | const deltaX = -(clientX - this.touchStart.x) * this.options.touchMultiplier; 290 | const deltaY = -(clientY - this.touchStart.y) * this.options.touchMultiplier; 291 | this.touchStart.x = clientX; 292 | this.touchStart.y = clientY; 293 | this.lastDelta = { 294 | x: deltaX, 295 | y: deltaY 296 | }; 297 | this.emitter.emit("scroll", { 298 | deltaX, 299 | deltaY, 300 | event 301 | }); 302 | }; 303 | onTouchEnd = (event) => { 304 | this.emitter.emit("scroll", { 305 | deltaX: this.lastDelta.x, 306 | deltaY: this.lastDelta.y, 307 | event 308 | }); 309 | }; 310 | /** Event handler for 'wheel' event */ 311 | onWheel = (event) => { 312 | let { deltaX, deltaY, deltaMode } = event; 313 | const multiplierX = deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.window.width : 1; 314 | const multiplierY = deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.window.height : 1; 315 | deltaX *= multiplierX; 316 | deltaY *= multiplierY; 317 | deltaX *= this.options.wheelMultiplier; 318 | deltaY *= this.options.wheelMultiplier; 319 | this.emitter.emit("scroll", { deltaX, deltaY, event }); 320 | }; 321 | onWindowResize = () => { 322 | this.window = { 323 | width: window.innerWidth, 324 | height: window.innerHeight 325 | }; 326 | }; 327 | }; 328 | 329 | // packages/core/src/lenis.ts 330 | var Lenis = class { 331 | _isScrolling = false; 332 | // true when scroll is animating 333 | _isStopped = false; 334 | // true if user should not be able to scroll - enable/disable programmatically 335 | _isLocked = false; 336 | // same as isStopped but enabled/disabled when scroll reaches target 337 | _preventNextNativeScrollEvent = false; 338 | _resetVelocityTimeout = null; 339 | __rafID = null; 340 | /** 341 | * Whether or not the user is touching the screen 342 | */ 343 | isTouching; 344 | /** 345 | * The time in ms since the lenis instance was created 346 | */ 347 | time = 0; 348 | /** 349 | * User data that will be forwarded through the scroll event 350 | * 351 | * @example 352 | * lenis.scrollTo(100, { 353 | * userData: { 354 | * foo: 'bar' 355 | * } 356 | * }) 357 | */ 358 | userData = {}; 359 | /** 360 | * The last velocity of the scroll 361 | */ 362 | lastVelocity = 0; 363 | /** 364 | * The current velocity of the scroll 365 | */ 366 | velocity = 0; 367 | /** 368 | * The direction of the scroll 369 | */ 370 | direction = 0; 371 | /** 372 | * The options passed to the lenis instance 373 | */ 374 | options; 375 | /** 376 | * The target scroll value 377 | */ 378 | targetScroll; 379 | /** 380 | * The animated scroll value 381 | */ 382 | animatedScroll; 383 | // These are instanciated here as they don't need information from the options 384 | animate = new Animate(); 385 | emitter = new Emitter(); 386 | // These are instanciated in the constructor as they need information from the options 387 | dimensions; 388 | // This is not private because it's used in the Snap class 389 | virtualScroll; 390 | constructor({ 391 | wrapper = window, 392 | content = document.documentElement, 393 | eventsTarget = wrapper, 394 | smoothWheel = true, 395 | syncTouch = false, 396 | syncTouchLerp = 0.075, 397 | touchInertiaMultiplier = 35, 398 | duration, 399 | // in seconds 400 | easing = (t) => Math.min(1, 1.001 - Math.pow(2, -10 * t)), 401 | lerp: lerp2 = 0.1, 402 | infinite = false, 403 | orientation = "vertical", 404 | // vertical, horizontal 405 | gestureOrientation = "vertical", 406 | // vertical, horizontal, both 407 | touchMultiplier = 1, 408 | wheelMultiplier = 1, 409 | autoResize = true, 410 | prevent, 411 | virtualScroll, 412 | overscroll = true, 413 | autoRaf = false, 414 | anchors = false, 415 | autoToggle = false, 416 | // https://caniuse.com/?search=transition-behavior 417 | allowNestedScroll = false, 418 | __experimental__naiveDimensions = false 419 | } = {}) { 420 | window.lenisVersion = version; 421 | if (!wrapper || wrapper === document.documentElement) { 422 | wrapper = window; 423 | } 424 | this.options = { 425 | wrapper, 426 | content, 427 | eventsTarget, 428 | smoothWheel, 429 | syncTouch, 430 | syncTouchLerp, 431 | touchInertiaMultiplier, 432 | duration, 433 | easing, 434 | lerp: lerp2, 435 | infinite, 436 | gestureOrientation, 437 | orientation, 438 | touchMultiplier, 439 | wheelMultiplier, 440 | autoResize, 441 | prevent, 442 | virtualScroll, 443 | overscroll, 444 | autoRaf, 445 | anchors, 446 | autoToggle, 447 | allowNestedScroll, 448 | __experimental__naiveDimensions 449 | }; 450 | this.dimensions = new Dimensions(wrapper, content, { autoResize }); 451 | this.updateClassName(); 452 | this.targetScroll = this.animatedScroll = this.actualScroll; 453 | this.options.wrapper.addEventListener("scroll", this.onNativeScroll, false); 454 | this.options.wrapper.addEventListener("scrollend", this.onScrollEnd, { 455 | capture: true 456 | }); 457 | if (this.options.anchors && this.options.wrapper === window) { 458 | this.options.wrapper.addEventListener( 459 | "click", 460 | this.onClick, 461 | false 462 | ); 463 | } 464 | this.options.wrapper.addEventListener( 465 | "pointerdown", 466 | this.onPointerDown, 467 | false 468 | ); 469 | this.virtualScroll = new VirtualScroll(eventsTarget, { 470 | touchMultiplier, 471 | wheelMultiplier 472 | }); 473 | this.virtualScroll.on("scroll", this.onVirtualScroll); 474 | if (this.options.autoToggle) { 475 | this.rootElement.addEventListener("transitionend", this.onTransitionEnd, { 476 | passive: true 477 | }); 478 | } 479 | if (this.options.autoRaf) { 480 | this.__rafID = requestAnimationFrame(this.raf); 481 | } 482 | } 483 | /** 484 | * Destroy the lenis instance, remove all event listeners and clean up the class name 485 | */ 486 | destroy() { 487 | this.emitter.destroy(); 488 | this.options.wrapper.removeEventListener( 489 | "scroll", 490 | this.onNativeScroll, 491 | false 492 | ); 493 | this.options.wrapper.removeEventListener("scrollend", this.onScrollEnd, { 494 | capture: true 495 | }); 496 | this.options.wrapper.removeEventListener( 497 | "pointerdown", 498 | this.onPointerDown, 499 | false 500 | ); 501 | if (this.options.anchors && this.options.wrapper === window) { 502 | this.options.wrapper.removeEventListener( 503 | "click", 504 | this.onClick, 505 | false 506 | ); 507 | } 508 | this.virtualScroll.destroy(); 509 | this.dimensions.destroy(); 510 | this.cleanUpClassName(); 511 | if (this.__rafID) { 512 | cancelAnimationFrame(this.__rafID); 513 | } 514 | } 515 | on(event, callback) { 516 | return this.emitter.on(event, callback); 517 | } 518 | off(event, callback) { 519 | return this.emitter.off(event, callback); 520 | } 521 | onScrollEnd = (e) => { 522 | if (!(e instanceof CustomEvent)) { 523 | if (this.isScrolling === "smooth" || this.isScrolling === false) { 524 | e.stopPropagation(); 525 | } 526 | } 527 | }; 528 | dispatchScrollendEvent = () => { 529 | this.options.wrapper.dispatchEvent( 530 | new CustomEvent("scrollend", { 531 | bubbles: this.options.wrapper === window, 532 | // cancelable: false, 533 | detail: { 534 | lenisScrollEnd: true 535 | } 536 | }) 537 | ); 538 | }; 539 | onTransitionEnd = (event) => { 540 | if (event.propertyName.includes("overflow")) { 541 | const property = this.isHorizontal ? "overflow-x" : "overflow-y"; 542 | const overflow = getComputedStyle(this.rootElement)[property]; 543 | if (["hidden", "clip"].includes(overflow)) { 544 | this.stop(); 545 | } else { 546 | this.start(); 547 | } 548 | } 549 | }; 550 | setScroll(scroll) { 551 | if (this.isHorizontal) { 552 | this.options.wrapper.scrollTo({ left: scroll, behavior: "instant" }); 553 | } else { 554 | this.options.wrapper.scrollTo({ top: scroll, behavior: "instant" }); 555 | } 556 | } 557 | onClick = (event) => { 558 | const path = event.composedPath(); 559 | const anchor = path.find( 560 | (node) => node instanceof HTMLAnchorElement && (node.getAttribute("href")?.startsWith("#") || node.getAttribute("href")?.startsWith("/#") || node.getAttribute("href")?.startsWith("./#")) 561 | ); 562 | if (anchor) { 563 | const id = anchor.getAttribute("href"); 564 | if (id) { 565 | const options = typeof this.options.anchors === "object" && this.options.anchors ? this.options.anchors : void 0; 566 | let target = `#${id.split("#")[1]}`; 567 | if (["#", "/#", "./#", "#top", "/#top", "./#top"].includes(id)) { 568 | target = 0; 569 | } 570 | this.scrollTo(target, options); 571 | } 572 | } 573 | }; 574 | onPointerDown = (event) => { 575 | if (event.button === 1) { 576 | this.reset(); 577 | } 578 | }; 579 | onVirtualScroll = (data) => { 580 | if (typeof this.options.virtualScroll === "function" && this.options.virtualScroll(data) === false) 581 | return; 582 | const { deltaX, deltaY, event } = data; 583 | this.emitter.emit("virtual-scroll", { deltaX, deltaY, event }); 584 | if (event.ctrlKey) return; 585 | if (event.lenisStopPropagation) return; 586 | const isTouch = event.type.includes("touch"); 587 | const isWheel = event.type.includes("wheel"); 588 | this.isTouching = event.type === "touchstart" || event.type === "touchmove"; 589 | const isClickOrTap = deltaX === 0 && deltaY === 0; 590 | const isTapToStop = this.options.syncTouch && isTouch && event.type === "touchstart" && isClickOrTap && !this.isStopped && !this.isLocked; 591 | if (isTapToStop) { 592 | this.reset(); 593 | return; 594 | } 595 | const isUnknownGesture = this.options.gestureOrientation === "vertical" && deltaY === 0 || this.options.gestureOrientation === "horizontal" && deltaX === 0; 596 | if (isClickOrTap || isUnknownGesture) { 597 | return; 598 | } 599 | let composedPath = event.composedPath(); 600 | composedPath = composedPath.slice(0, composedPath.indexOf(this.rootElement)); 601 | const prevent = this.options.prevent; 602 | if (!!composedPath.find( 603 | (node) => node instanceof HTMLElement && (typeof prevent === "function" && prevent?.(node) || node.hasAttribute?.("data-lenis-prevent") || isTouch && node.hasAttribute?.("data-lenis-prevent-touch") || isWheel && node.hasAttribute?.("data-lenis-prevent-wheel") || this.options.allowNestedScroll && this.checkNestedScroll(node, { deltaX, deltaY })) 604 | )) 605 | return; 606 | if (this.isStopped || this.isLocked) { 607 | event.preventDefault(); 608 | return; 609 | } 610 | const isSmooth = this.options.syncTouch && isTouch || this.options.smoothWheel && isWheel; 611 | if (!isSmooth) { 612 | this.isScrolling = "native"; 613 | this.animate.stop(); 614 | event.lenisStopPropagation = true; 615 | return; 616 | } 617 | let delta = deltaY; 618 | if (this.options.gestureOrientation === "both") { 619 | delta = Math.abs(deltaY) > Math.abs(deltaX) ? deltaY : deltaX; 620 | } else if (this.options.gestureOrientation === "horizontal") { 621 | delta = deltaX; 622 | } 623 | if (!this.options.overscroll || this.options.infinite || this.options.wrapper !== window && (this.animatedScroll > 0 && this.animatedScroll < this.limit || this.animatedScroll === 0 && deltaY > 0 || this.animatedScroll === this.limit && deltaY < 0)) { 624 | event.lenisStopPropagation = true; 625 | } 626 | event.preventDefault(); 627 | const isSyncTouch = isTouch && this.options.syncTouch; 628 | const isTouchEnd = isTouch && event.type === "touchend"; 629 | const hasTouchInertia = isTouchEnd && Math.abs(delta) > 5; 630 | if (hasTouchInertia) { 631 | delta = this.velocity * this.options.touchInertiaMultiplier; 632 | } 633 | this.scrollTo(this.targetScroll + delta, { 634 | programmatic: false, 635 | ...isSyncTouch ? { 636 | lerp: hasTouchInertia ? this.options.syncTouchLerp : 1 637 | // immediate: !hasTouchInertia, 638 | } : { 639 | lerp: this.options.lerp, 640 | duration: this.options.duration, 641 | easing: this.options.easing 642 | } 643 | }); 644 | }; 645 | /** 646 | * Force lenis to recalculate the dimensions 647 | */ 648 | resize() { 649 | this.dimensions.resize(); 650 | this.animatedScroll = this.targetScroll = this.actualScroll; 651 | this.emit(); 652 | } 653 | emit() { 654 | this.emitter.emit("scroll", this); 655 | } 656 | onNativeScroll = () => { 657 | if (this._resetVelocityTimeout !== null) { 658 | clearTimeout(this._resetVelocityTimeout); 659 | this._resetVelocityTimeout = null; 660 | } 661 | if (this._preventNextNativeScrollEvent) { 662 | this._preventNextNativeScrollEvent = false; 663 | return; 664 | } 665 | if (this.isScrolling === false || this.isScrolling === "native") { 666 | const lastScroll = this.animatedScroll; 667 | this.animatedScroll = this.targetScroll = this.actualScroll; 668 | this.lastVelocity = this.velocity; 669 | this.velocity = this.animatedScroll - lastScroll; 670 | this.direction = Math.sign( 671 | this.animatedScroll - lastScroll 672 | ); 673 | if (!this.isStopped) { 674 | this.isScrolling = "native"; 675 | } 676 | this.emit(); 677 | if (this.velocity !== 0) { 678 | this._resetVelocityTimeout = setTimeout(() => { 679 | this.lastVelocity = this.velocity; 680 | this.velocity = 0; 681 | this.isScrolling = false; 682 | this.emit(); 683 | }, 400); 684 | } 685 | } 686 | }; 687 | reset() { 688 | this.isLocked = false; 689 | this.isScrolling = false; 690 | this.animatedScroll = this.targetScroll = this.actualScroll; 691 | this.lastVelocity = this.velocity = 0; 692 | this.animate.stop(); 693 | } 694 | /** 695 | * Start lenis scroll after it has been stopped 696 | */ 697 | start() { 698 | if (!this.isStopped) return; 699 | this.reset(); 700 | this.isStopped = false; 701 | } 702 | /** 703 | * Stop lenis scroll 704 | */ 705 | stop() { 706 | if (this.isStopped) return; 707 | this.reset(); 708 | this.isStopped = true; 709 | } 710 | /** 711 | * RequestAnimationFrame for lenis 712 | * 713 | * @param time The time in ms from an external clock like `requestAnimationFrame` or Tempus 714 | */ 715 | raf = (time) => { 716 | const deltaTime = time - (this.time || time); 717 | this.time = time; 718 | this.animate.advance(deltaTime * 1e-3); 719 | if (this.options.autoRaf) { 720 | this.__rafID = requestAnimationFrame(this.raf); 721 | } 722 | }; 723 | /** 724 | * Scroll to a target value 725 | * 726 | * @param target The target value to scroll to 727 | * @param options The options for the scroll 728 | * 729 | * @example 730 | * lenis.scrollTo(100, { 731 | * offset: 100, 732 | * duration: 1, 733 | * easing: (t) => 1 - Math.cos((t * Math.PI) / 2), 734 | * lerp: 0.1, 735 | * onStart: () => { 736 | * console.log('onStart') 737 | * }, 738 | * onComplete: () => { 739 | * console.log('onComplete') 740 | * }, 741 | * }) 742 | */ 743 | scrollTo(target, { 744 | offset = 0, 745 | immediate = false, 746 | lock = false, 747 | duration = this.options.duration, 748 | easing = this.options.easing, 749 | lerp: lerp2 = this.options.lerp, 750 | onStart, 751 | onComplete, 752 | force = false, 753 | // scroll even if stopped 754 | programmatic = true, 755 | // called from outside of the class 756 | userData 757 | } = {}) { 758 | if ((this.isStopped || this.isLocked) && !force) return; 759 | if (typeof target === "string" && ["top", "left", "start"].includes(target)) { 760 | target = 0; 761 | } else if (typeof target === "string" && ["bottom", "right", "end"].includes(target)) { 762 | target = this.limit; 763 | } else { 764 | let node; 765 | if (typeof target === "string") { 766 | node = document.querySelector(target); 767 | } else if (target instanceof HTMLElement && target?.nodeType) { 768 | node = target; 769 | } 770 | if (node) { 771 | if (this.options.wrapper !== window) { 772 | const wrapperRect = this.rootElement.getBoundingClientRect(); 773 | offset -= this.isHorizontal ? wrapperRect.left : wrapperRect.top; 774 | } 775 | const rect = node.getBoundingClientRect(); 776 | target = (this.isHorizontal ? rect.left : rect.top) + this.animatedScroll; 777 | } 778 | } 779 | if (typeof target !== "number") return; 780 | target += offset; 781 | target = Math.round(target); 782 | if (this.options.infinite) { 783 | if (programmatic) { 784 | this.targetScroll = this.animatedScroll = this.scroll; 785 | const distance = target - this.animatedScroll; 786 | if (distance > this.limit / 2) { 787 | target = target - this.limit; 788 | } else if (distance < -this.limit / 2) { 789 | target = target + this.limit; 790 | } 791 | } 792 | } else { 793 | target = clamp(0, target, this.limit); 794 | } 795 | if (target === this.targetScroll) { 796 | onStart?.(this); 797 | onComplete?.(this); 798 | return; 799 | } 800 | this.userData = userData ?? {}; 801 | if (immediate) { 802 | this.animatedScroll = this.targetScroll = target; 803 | this.setScroll(this.scroll); 804 | this.reset(); 805 | this.preventNextNativeScrollEvent(); 806 | this.emit(); 807 | onComplete?.(this); 808 | this.userData = {}; 809 | requestAnimationFrame(() => { 810 | this.dispatchScrollendEvent(); 811 | }); 812 | return; 813 | } 814 | if (!programmatic) { 815 | this.targetScroll = target; 816 | } 817 | this.animate.fromTo(this.animatedScroll, target, { 818 | duration, 819 | easing, 820 | lerp: lerp2, 821 | onStart: () => { 822 | if (lock) this.isLocked = true; 823 | this.isScrolling = "smooth"; 824 | onStart?.(this); 825 | }, 826 | onUpdate: (value, completed) => { 827 | this.isScrolling = "smooth"; 828 | this.lastVelocity = this.velocity; 829 | this.velocity = value - this.animatedScroll; 830 | this.direction = Math.sign(this.velocity); 831 | this.animatedScroll = value; 832 | this.setScroll(this.scroll); 833 | if (programmatic) { 834 | this.targetScroll = value; 835 | } 836 | if (!completed) this.emit(); 837 | if (completed) { 838 | this.reset(); 839 | this.emit(); 840 | onComplete?.(this); 841 | this.userData = {}; 842 | requestAnimationFrame(() => { 843 | this.dispatchScrollendEvent(); 844 | }); 845 | this.preventNextNativeScrollEvent(); 846 | } 847 | } 848 | }); 849 | } 850 | preventNextNativeScrollEvent() { 851 | this._preventNextNativeScrollEvent = true; 852 | requestAnimationFrame(() => { 853 | this._preventNextNativeScrollEvent = false; 854 | }); 855 | } 856 | checkNestedScroll(node, { deltaX, deltaY }) { 857 | const time = Date.now(); 858 | const cache = node._lenis ??= {}; 859 | let hasOverflowX, hasOverflowY, isScrollableX, isScrollableY, scrollWidth, scrollHeight, clientWidth, clientHeight; 860 | const gestureOrientation = this.options.gestureOrientation; 861 | if (time - (cache.time ?? 0) > 2e3) { 862 | cache.time = Date.now(); 863 | const computedStyle = window.getComputedStyle(node); 864 | cache.computedStyle = computedStyle; 865 | const overflowXString = computedStyle.overflowX; 866 | const overflowYString = computedStyle.overflowY; 867 | hasOverflowX = ["auto", "overlay", "scroll"].includes(overflowXString); 868 | hasOverflowY = ["auto", "overlay", "scroll"].includes(overflowYString); 869 | cache.hasOverflowX = hasOverflowX; 870 | cache.hasOverflowY = hasOverflowY; 871 | if (!hasOverflowX && !hasOverflowY) return false; 872 | if (gestureOrientation === "vertical" && !hasOverflowY) return false; 873 | if (gestureOrientation === "horizontal" && !hasOverflowX) return false; 874 | scrollWidth = node.scrollWidth; 875 | scrollHeight = node.scrollHeight; 876 | clientWidth = node.clientWidth; 877 | clientHeight = node.clientHeight; 878 | isScrollableX = scrollWidth > clientWidth; 879 | isScrollableY = scrollHeight > clientHeight; 880 | cache.isScrollableX = isScrollableX; 881 | cache.isScrollableY = isScrollableY; 882 | cache.scrollWidth = scrollWidth; 883 | cache.scrollHeight = scrollHeight; 884 | cache.clientWidth = clientWidth; 885 | cache.clientHeight = clientHeight; 886 | } else { 887 | isScrollableX = cache.isScrollableX; 888 | isScrollableY = cache.isScrollableY; 889 | hasOverflowX = cache.hasOverflowX; 890 | hasOverflowY = cache.hasOverflowY; 891 | scrollWidth = cache.scrollWidth; 892 | scrollHeight = cache.scrollHeight; 893 | clientWidth = cache.clientWidth; 894 | clientHeight = cache.clientHeight; 895 | } 896 | if (!hasOverflowX && !hasOverflowY || !isScrollableX && !isScrollableY) { 897 | return false; 898 | } 899 | if (gestureOrientation === "vertical" && (!hasOverflowY || !isScrollableY)) 900 | return false; 901 | if (gestureOrientation === "horizontal" && (!hasOverflowX || !isScrollableX)) 902 | return false; 903 | let orientation; 904 | if (gestureOrientation === "horizontal") { 905 | orientation = "x"; 906 | } else if (gestureOrientation === "vertical") { 907 | orientation = "y"; 908 | } else { 909 | const isScrollingX = deltaX !== 0; 910 | const isScrollingY = deltaY !== 0; 911 | if (isScrollingX && hasOverflowX && isScrollableX) { 912 | orientation = "x"; 913 | } 914 | if (isScrollingY && hasOverflowY && isScrollableY) { 915 | orientation = "y"; 916 | } 917 | } 918 | if (!orientation) return false; 919 | let scroll, maxScroll, delta, hasOverflow, isScrollable; 920 | if (orientation === "x") { 921 | scroll = node.scrollLeft; 922 | maxScroll = scrollWidth - clientWidth; 923 | delta = deltaX; 924 | hasOverflow = hasOverflowX; 925 | isScrollable = isScrollableX; 926 | } else if (orientation === "y") { 927 | scroll = node.scrollTop; 928 | maxScroll = scrollHeight - clientHeight; 929 | delta = deltaY; 930 | hasOverflow = hasOverflowY; 931 | isScrollable = isScrollableY; 932 | } else { 933 | return false; 934 | } 935 | const willScroll = delta > 0 ? scroll < maxScroll : scroll > 0; 936 | return willScroll && hasOverflow && isScrollable; 937 | } 938 | /** 939 | * The root element on which lenis is instanced 940 | */ 941 | get rootElement() { 942 | return this.options.wrapper === window ? document.documentElement : this.options.wrapper; 943 | } 944 | /** 945 | * The limit which is the maximum scroll value 946 | */ 947 | get limit() { 948 | if (this.options.__experimental__naiveDimensions) { 949 | if (this.isHorizontal) { 950 | return this.rootElement.scrollWidth - this.rootElement.clientWidth; 951 | } else { 952 | return this.rootElement.scrollHeight - this.rootElement.clientHeight; 953 | } 954 | } else { 955 | return this.dimensions.limit[this.isHorizontal ? "x" : "y"]; 956 | } 957 | } 958 | /** 959 | * Whether or not the scroll is horizontal 960 | */ 961 | get isHorizontal() { 962 | return this.options.orientation === "horizontal"; 963 | } 964 | /** 965 | * The actual scroll value 966 | */ 967 | get actualScroll() { 968 | const wrapper = this.options.wrapper; 969 | return this.isHorizontal ? wrapper.scrollX ?? wrapper.scrollLeft : wrapper.scrollY ?? wrapper.scrollTop; 970 | } 971 | /** 972 | * The current scroll value 973 | */ 974 | get scroll() { 975 | return this.options.infinite ? modulo(this.animatedScroll, this.limit) : this.animatedScroll; 976 | } 977 | /** 978 | * The progress of the scroll relative to the limit 979 | */ 980 | get progress() { 981 | return this.limit === 0 ? 1 : this.scroll / this.limit; 982 | } 983 | /** 984 | * Current scroll state 985 | */ 986 | get isScrolling() { 987 | return this._isScrolling; 988 | } 989 | set isScrolling(value) { 990 | if (this._isScrolling !== value) { 991 | this._isScrolling = value; 992 | this.updateClassName(); 993 | } 994 | } 995 | /** 996 | * Check if lenis is stopped 997 | */ 998 | get isStopped() { 999 | return this._isStopped; 1000 | } 1001 | set isStopped(value) { 1002 | if (this._isStopped !== value) { 1003 | this._isStopped = value; 1004 | this.updateClassName(); 1005 | } 1006 | } 1007 | /** 1008 | * Check if lenis is locked 1009 | */ 1010 | get isLocked() { 1011 | return this._isLocked; 1012 | } 1013 | set isLocked(value) { 1014 | if (this._isLocked !== value) { 1015 | this._isLocked = value; 1016 | this.updateClassName(); 1017 | } 1018 | } 1019 | /** 1020 | * Check if lenis is smooth scrolling 1021 | */ 1022 | get isSmooth() { 1023 | return this.isScrolling === "smooth"; 1024 | } 1025 | /** 1026 | * The class name applied to the wrapper element 1027 | */ 1028 | get className() { 1029 | let className = "lenis"; 1030 | if (this.options.autoToggle) className += " lenis-autoToggle"; 1031 | if (this.isStopped) className += " lenis-stopped"; 1032 | if (this.isLocked) className += " lenis-locked"; 1033 | if (this.isScrolling) className += " lenis-scrolling"; 1034 | if (this.isScrolling === "smooth") className += " lenis-smooth"; 1035 | return className; 1036 | } 1037 | updateClassName() { 1038 | this.cleanUpClassName(); 1039 | this.rootElement.className = `${this.rootElement.className} ${this.className}`.trim(); 1040 | } 1041 | cleanUpClassName() { 1042 | this.rootElement.className = this.rootElement.className.replace(/lenis(-\w+)?/g, "").trim(); 1043 | } 1044 | }; 1045 | 1046 | class FeatherScroll { 1047 | // Stores all instances of FeatherScroll 1048 | static instances = []; 1049 | constructor(options = {}) { 1050 | this.wrapper = options.wrapper || document.documentElement; 1051 | this.content = options.content || document.body; 1052 | // Initialize Lenis with custom options or defaults 1053 | this.lenis = new Lenis({ 1054 | wrapper: this.wrapper, 1055 | content: this.content, 1056 | smooth: options.smooth ?? true, 1057 | duration: options.duration ?? 1.2, 1058 | easing: options.easing ?? ((t) => 1 - Math.pow(1 - t, 3)), 1059 | direction: options.direction ?? 'vertical', 1060 | gestureDirection: options.gestureDirection ?? 'both', 1061 | wheelMultiplier: options.mouseSenstivity ?? 1, 1062 | touchMultiplier: options.touchSenstivity ?? 2, 1063 | infinite: options.infinite ?? false 1064 | }); 1065 | // Scroll direction tracking 1066 | this.scrollDirection = 'down'; 1067 | this.lastScroll = 0; 1068 | // Elements with sticky and parallax behavior 1069 | this.stickyElements = [...this.content.querySelectorAll('[data-scroll-sticky]')]; 1070 | this.parallaxElements = [...this.content.querySelectorAll('[data-scroll-speed]')]; 1071 | // Store initial positions for parallax elements 1072 | this.parallaxElements.forEach((el) => { 1073 | const rect = el.getBoundingClientRect(); 1074 | el.dataset.initialTop = rect.top + window.scrollY; 1075 | el.dataset.initialLeft = rect.left + window.scrollX; 1076 | }); 1077 | // Initialize features 1078 | this.initStickyElements(); 1079 | this.trackScrollDirection(); 1080 | this.startRAF(); // Start animation loop 1081 | FeatherScroll.instances.push(this); // Register instance 1082 | if (window.ScrollTrigger) { 1083 | this.setupScrollTrigger(); 1084 | } 1085 | // Observe body overflow for automatic disabling 1086 | this.observeBodyOverflow(); 1087 | } 1088 | // RAF loop for Lenis + sticky + parallax 1089 | startRAF() { 1090 | const raf = (time) => { 1091 | this.lenis.raf(time); 1092 | this.updateStickyElements(); 1093 | this.updateParallax(); 1094 | requestAnimationFrame(raf); 1095 | }; 1096 | requestAnimationFrame(raf); 1097 | } 1098 | // Detect scroll direction: 'up' or 'down' 1099 | trackScrollDirection() { 1100 | this.lenis.on('scroll', ({ scroll }) => { 1101 | const newDirection = scroll > this.lastScroll ? 'down' : 'up'; 1102 | if (newDirection !== this.scrollDirection) { 1103 | this.scrollDirection = newDirection; 1104 | } 1105 | this.lastScroll = scroll; 1106 | }); 1107 | } 1108 | // Observe overflow-y on body, pause/resume Lenis 1109 | observeBodyOverflow() { 1110 | const observer = new MutationObserver(() => { 1111 | const overflowY = window.getComputedStyle(document.body).overflowY; 1112 | if (overflowY === 'hidden') { 1113 | this.lenis.stop(); 1114 | } else { 1115 | this.lenis.start(); 1116 | } 1117 | }); 1118 | observer.observe(document.body, { 1119 | attributes: true, 1120 | attributeFilter: ['style'] 1121 | }); 1122 | // Initial check 1123 | const initialOverflowY = window.getComputedStyle(document.body).overflowY; 1124 | if (initialOverflowY === 'hidden') { 1125 | this.lenis.stop(); 1126 | } 1127 | } 1128 | // Return current scroll direction 1129 | getScrollDirection() { 1130 | return this.scrollDirection || 'down'; 1131 | } 1132 | // Set initial positions for sticky elements 1133 | initStickyElements() { 1134 | this.stickyElements.forEach((el) => { 1135 | const parent = el.parentElement; 1136 | const rect = el.getBoundingClientRect(); 1137 | el.dataset.stickyStart = parent.offsetTop; 1138 | el.dataset.stickyEnd = parent.offsetTop + parent.offsetHeight; 1139 | el.dataset.originalWidth = `${rect.width}px`; 1140 | el.dataset.originalHeight = `${rect.height}px`; 1141 | }); 1142 | } 1143 | // Update sticky element positions 1144 | updateStickyElements() { 1145 | const scrollY = this.lenis.scroll; 1146 | const viewportHeight = window.innerHeight; 1147 | this.stickyElements.forEach((el) => { 1148 | const parent = el.parentElement; 1149 | const nextSibling = parent.nextElementSibling; 1150 | if (!nextSibling) return; 1151 | const stickyStart = parseFloat(el.dataset.stickyStart); 1152 | const stickyEnd = parseFloat(el.dataset.stickyEnd); 1153 | const parentRect = parent.getBoundingClientRect(); 1154 | const nextRect = nextSibling.getBoundingClientRect(); 1155 | // If next section enters halfway viewport, stop sticking 1156 | const isNextEntering = nextRect.top < viewportHeight * 0.5; 1157 | if (scrollY >= stickyStart && scrollY < stickyEnd && !isNextEntering) { 1158 | el.style.position = 'fixed'; 1159 | el.style.top = `${window.innerHeight / 2 - el.offsetHeight / 2}px`; 1160 | el.style.left = `${parentRect.left + parentRect.width / 2 - el.offsetWidth / 2}px`; 1161 | el.style.opacity = '1'; 1162 | } else { 1163 | el.style.position = 'relative'; 1164 | el.style.opacity = '0'; 1165 | } 1166 | }); 1167 | } 1168 | // Apply parallax effect based on data attributes 1169 | updateParallax() { 1170 | const scrollY = this.lenis.scroll; 1171 | this.parallaxElements.forEach((el) => { 1172 | const speed = parseFloat(el.getAttribute("data-scroll-speed")) || 1; 1173 | const direction = el.getAttribute("data-scroll-direction") || "vertical"; 1174 | const initialTop = parseFloat(el.dataset.initialTop); 1175 | parseFloat(el.dataset.initialLeft); 1176 | let offsetX = 0, offsetY = 0; 1177 | if (direction === "horizontal") { 1178 | offsetX = (scrollY - initialTop) * speed * 0.1; 1179 | } else if (direction === "vertical") { 1180 | offsetY = (scrollY - initialTop) * speed * 0.1; 1181 | } else if (direction === "both") { 1182 | offsetX = (scrollY - initialTop) * speed * 0.1; 1183 | offsetY = (scrollY - initialTop) * speed * 0.1; 1184 | } 1185 | // If GSAP is present, respect GSAP transforms 1186 | let gsapX = 0, gsapY = 0; 1187 | if (window.gsap) { 1188 | gsapX = gsap.getProperty(el, "x") || 0; 1189 | gsapY = gsap.getProperty(el, "y") || 0; 1190 | } 1191 | el.style.transform = `translate3d(${offsetX + gsapX}px, ${offsetY + gsapY}px, 0)`; 1192 | }); 1193 | } 1194 | // Integration with GSAP ScrollTrigger 1195 | setupScrollTrigger() { 1196 | this.lenis.on('scroll', () => { 1197 | ScrollTrigger.update(); 1198 | }); 1199 | } 1200 | // Public method: Scroll to a target 1201 | scrollTo(target, options = {}) { 1202 | this.lenis.scrollTo(target, options); 1203 | } 1204 | // Public method: Start scrolling 1205 | start() { 1206 | this.lenis.start(); 1207 | } 1208 | // Public method: Stop scrolling 1209 | stop() { 1210 | this.lenis.stop(); 1211 | } 1212 | // Public method: Destroy the instance 1213 | destroy() { 1214 | this.lenis.destroy(); 1215 | FeatherScroll.instances = FeatherScroll.instances.filter((instance) => instance !== this); 1216 | } 1217 | // Public method: Get scroll position 1218 | getScrollPosition() { 1219 | return this.lenis.scroll; 1220 | } 1221 | // Update Lenis options dynamically 1222 | updateOptions(newOptions) { 1223 | Object.assign(this.lenis.options, newOptions); 1224 | } 1225 | } 1226 | 1227 | // Also attach to window for CDN users 1228 | if (typeof window !== 'undefined') { 1229 | window.FeatherScroll = FeatherScroll; 1230 | } 1231 | 1232 | export { FeatherScroll as default }; 1233 | //# sourceMappingURL=featherScroll.esm.js.map 1234 | -------------------------------------------------------------------------------- /dist/featherScroll.esm.js.map: -------------------------------------------------------------------------------- 1 | {"version":3,"file":"featherScroll.esm.js","sources":["../node_modules/lenis/dist/lenis.mjs","../src/featherScroll.js"],"sourcesContent":["// package.json\nvar version = \"1.3.1\";\n\n// packages/core/src/maths.ts\nfunction clamp(min, input, max) {\n return Math.max(min, Math.min(input, max));\n}\nfunction lerp(x, y, t) {\n return (1 - t) * x + t * y;\n}\nfunction damp(x, y, lambda, deltaTime) {\n return lerp(x, y, 1 - Math.exp(-lambda * deltaTime));\n}\nfunction modulo(n, d) {\n return (n % d + d) % d;\n}\n\n// packages/core/src/animate.ts\nvar Animate = class {\n isRunning = false;\n value = 0;\n from = 0;\n to = 0;\n currentTime = 0;\n // These are instanciated in the fromTo method\n lerp;\n duration;\n easing;\n onUpdate;\n /**\n * Advance the animation by the given delta time\n *\n * @param deltaTime - The time in seconds to advance the animation\n */\n advance(deltaTime) {\n if (!this.isRunning) return;\n let completed = false;\n if (this.duration && this.easing) {\n this.currentTime += deltaTime;\n const linearProgress = clamp(0, this.currentTime / this.duration, 1);\n completed = linearProgress >= 1;\n const easedProgress = completed ? 1 : this.easing(linearProgress);\n this.value = this.from + (this.to - this.from) * easedProgress;\n } else if (this.lerp) {\n this.value = damp(this.value, this.to, this.lerp * 60, deltaTime);\n if (Math.round(this.value) === this.to) {\n this.value = this.to;\n completed = true;\n }\n } else {\n this.value = this.to;\n completed = true;\n }\n if (completed) {\n this.stop();\n }\n this.onUpdate?.(this.value, completed);\n }\n /** Stop the animation */\n stop() {\n this.isRunning = false;\n }\n /**\n * Set up the animation from a starting value to an ending value\n * with optional parameters for lerping, duration, easing, and onUpdate callback\n *\n * @param from - The starting value\n * @param to - The ending value\n * @param options - Options for the animation\n */\n fromTo(from, to, { lerp: lerp2, duration, easing, onStart, onUpdate }) {\n this.from = this.value = from;\n this.to = to;\n this.lerp = lerp2;\n this.duration = duration;\n this.easing = easing;\n this.currentTime = 0;\n this.isRunning = true;\n onStart?.();\n this.onUpdate = onUpdate;\n }\n};\n\n// packages/core/src/debounce.ts\nfunction debounce(callback, delay) {\n let timer;\n return function(...args) {\n let context = this;\n clearTimeout(timer);\n timer = setTimeout(() => {\n timer = void 0;\n callback.apply(context, args);\n }, delay);\n };\n}\n\n// packages/core/src/dimensions.ts\nvar Dimensions = class {\n constructor(wrapper, content, { autoResize = true, debounce: debounceValue = 250 } = {}) {\n this.wrapper = wrapper;\n this.content = content;\n if (autoResize) {\n this.debouncedResize = debounce(this.resize, debounceValue);\n if (this.wrapper instanceof Window) {\n window.addEventListener(\"resize\", this.debouncedResize, false);\n } else {\n this.wrapperResizeObserver = new ResizeObserver(this.debouncedResize);\n this.wrapperResizeObserver.observe(this.wrapper);\n }\n this.contentResizeObserver = new ResizeObserver(this.debouncedResize);\n this.contentResizeObserver.observe(this.content);\n }\n this.resize();\n }\n width = 0;\n height = 0;\n scrollHeight = 0;\n scrollWidth = 0;\n // These are instanciated in the constructor as they need information from the options\n debouncedResize;\n wrapperResizeObserver;\n contentResizeObserver;\n destroy() {\n this.wrapperResizeObserver?.disconnect();\n this.contentResizeObserver?.disconnect();\n if (this.wrapper === window && this.debouncedResize) {\n window.removeEventListener(\"resize\", this.debouncedResize, false);\n }\n }\n resize = () => {\n this.onWrapperResize();\n this.onContentResize();\n };\n onWrapperResize = () => {\n if (this.wrapper instanceof Window) {\n this.width = window.innerWidth;\n this.height = window.innerHeight;\n } else {\n this.width = this.wrapper.clientWidth;\n this.height = this.wrapper.clientHeight;\n }\n };\n onContentResize = () => {\n if (this.wrapper instanceof Window) {\n this.scrollHeight = this.content.scrollHeight;\n this.scrollWidth = this.content.scrollWidth;\n } else {\n this.scrollHeight = this.wrapper.scrollHeight;\n this.scrollWidth = this.wrapper.scrollWidth;\n }\n };\n get limit() {\n return {\n x: this.scrollWidth - this.width,\n y: this.scrollHeight - this.height\n };\n }\n};\n\n// packages/core/src/emitter.ts\nvar Emitter = class {\n events = {};\n /**\n * Emit an event with the given data\n * @param event Event name\n * @param args Data to pass to the event handlers\n */\n emit(event, ...args) {\n let callbacks = this.events[event] || [];\n for (let i = 0, length = callbacks.length; i < length; i++) {\n callbacks[i]?.(...args);\n }\n }\n /**\n * Add a callback to the event\n * @param event Event name\n * @param cb Callback function\n * @returns Unsubscribe function\n */\n on(event, cb) {\n this.events[event]?.push(cb) || (this.events[event] = [cb]);\n return () => {\n this.events[event] = this.events[event]?.filter((i) => cb !== i);\n };\n }\n /**\n * Remove a callback from the event\n * @param event Event name\n * @param callback Callback function\n */\n off(event, callback) {\n this.events[event] = this.events[event]?.filter((i) => callback !== i);\n }\n /**\n * Remove all event listeners and clean up\n */\n destroy() {\n this.events = {};\n }\n};\n\n// packages/core/src/virtual-scroll.ts\nvar LINE_HEIGHT = 100 / 6;\nvar listenerOptions = { passive: false };\nvar VirtualScroll = class {\n constructor(element, options = { wheelMultiplier: 1, touchMultiplier: 1 }) {\n this.element = element;\n this.options = options;\n window.addEventListener(\"resize\", this.onWindowResize, false);\n this.onWindowResize();\n this.element.addEventListener(\"wheel\", this.onWheel, listenerOptions);\n this.element.addEventListener(\n \"touchstart\",\n this.onTouchStart,\n listenerOptions\n );\n this.element.addEventListener(\n \"touchmove\",\n this.onTouchMove,\n listenerOptions\n );\n this.element.addEventListener(\"touchend\", this.onTouchEnd, listenerOptions);\n }\n touchStart = {\n x: 0,\n y: 0\n };\n lastDelta = {\n x: 0,\n y: 0\n };\n window = {\n width: 0,\n height: 0\n };\n emitter = new Emitter();\n /**\n * Add an event listener for the given event and callback\n *\n * @param event Event name\n * @param callback Callback function\n */\n on(event, callback) {\n return this.emitter.on(event, callback);\n }\n /** Remove all event listeners and clean up */\n destroy() {\n this.emitter.destroy();\n window.removeEventListener(\"resize\", this.onWindowResize, false);\n this.element.removeEventListener(\"wheel\", this.onWheel, listenerOptions);\n this.element.removeEventListener(\n \"touchstart\",\n this.onTouchStart,\n listenerOptions\n );\n this.element.removeEventListener(\n \"touchmove\",\n this.onTouchMove,\n listenerOptions\n );\n this.element.removeEventListener(\n \"touchend\",\n this.onTouchEnd,\n listenerOptions\n );\n }\n /**\n * Event handler for 'touchstart' event\n *\n * @param event Touch event\n */\n onTouchStart = (event) => {\n const { clientX, clientY } = event.targetTouches ? event.targetTouches[0] : event;\n this.touchStart.x = clientX;\n this.touchStart.y = clientY;\n this.lastDelta = {\n x: 0,\n y: 0\n };\n this.emitter.emit(\"scroll\", {\n deltaX: 0,\n deltaY: 0,\n event\n });\n };\n /** Event handler for 'touchmove' event */\n onTouchMove = (event) => {\n const { clientX, clientY } = event.targetTouches ? event.targetTouches[0] : event;\n const deltaX = -(clientX - this.touchStart.x) * this.options.touchMultiplier;\n const deltaY = -(clientY - this.touchStart.y) * this.options.touchMultiplier;\n this.touchStart.x = clientX;\n this.touchStart.y = clientY;\n this.lastDelta = {\n x: deltaX,\n y: deltaY\n };\n this.emitter.emit(\"scroll\", {\n deltaX,\n deltaY,\n event\n });\n };\n onTouchEnd = (event) => {\n this.emitter.emit(\"scroll\", {\n deltaX: this.lastDelta.x,\n deltaY: this.lastDelta.y,\n event\n });\n };\n /** Event handler for 'wheel' event */\n onWheel = (event) => {\n let { deltaX, deltaY, deltaMode } = event;\n const multiplierX = deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.window.width : 1;\n const multiplierY = deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.window.height : 1;\n deltaX *= multiplierX;\n deltaY *= multiplierY;\n deltaX *= this.options.wheelMultiplier;\n deltaY *= this.options.wheelMultiplier;\n this.emitter.emit(\"scroll\", { deltaX, deltaY, event });\n };\n onWindowResize = () => {\n this.window = {\n width: window.innerWidth,\n height: window.innerHeight\n };\n };\n};\n\n// packages/core/src/lenis.ts\nvar Lenis = class {\n _isScrolling = false;\n // true when scroll is animating\n _isStopped = false;\n // true if user should not be able to scroll - enable/disable programmatically\n _isLocked = false;\n // same as isStopped but enabled/disabled when scroll reaches target\n _preventNextNativeScrollEvent = false;\n _resetVelocityTimeout = null;\n __rafID = null;\n /**\n * Whether or not the user is touching the screen\n */\n isTouching;\n /**\n * The time in ms since the lenis instance was created\n */\n time = 0;\n /**\n * User data that will be forwarded through the scroll event\n *\n * @example\n * lenis.scrollTo(100, {\n * userData: {\n * foo: 'bar'\n * }\n * })\n */\n userData = {};\n /**\n * The last velocity of the scroll\n */\n lastVelocity = 0;\n /**\n * The current velocity of the scroll\n */\n velocity = 0;\n /**\n * The direction of the scroll\n */\n direction = 0;\n /**\n * The options passed to the lenis instance\n */\n options;\n /**\n * The target scroll value\n */\n targetScroll;\n /**\n * The animated scroll value\n */\n animatedScroll;\n // These are instanciated here as they don't need information from the options\n animate = new Animate();\n emitter = new Emitter();\n // These are instanciated in the constructor as they need information from the options\n dimensions;\n // This is not private because it's used in the Snap class\n virtualScroll;\n constructor({\n wrapper = window,\n content = document.documentElement,\n eventsTarget = wrapper,\n smoothWheel = true,\n syncTouch = false,\n syncTouchLerp = 0.075,\n touchInertiaMultiplier = 35,\n duration,\n // in seconds\n easing = (t) => Math.min(1, 1.001 - Math.pow(2, -10 * t)),\n lerp: lerp2 = 0.1,\n infinite = false,\n orientation = \"vertical\",\n // vertical, horizontal\n gestureOrientation = \"vertical\",\n // vertical, horizontal, both\n touchMultiplier = 1,\n wheelMultiplier = 1,\n autoResize = true,\n prevent,\n virtualScroll,\n overscroll = true,\n autoRaf = false,\n anchors = false,\n autoToggle = false,\n // https://caniuse.com/?search=transition-behavior\n allowNestedScroll = false,\n __experimental__naiveDimensions = false\n } = {}) {\n window.lenisVersion = version;\n if (!wrapper || wrapper === document.documentElement) {\n wrapper = window;\n }\n this.options = {\n wrapper,\n content,\n eventsTarget,\n smoothWheel,\n syncTouch,\n syncTouchLerp,\n touchInertiaMultiplier,\n duration,\n easing,\n lerp: lerp2,\n infinite,\n gestureOrientation,\n orientation,\n touchMultiplier,\n wheelMultiplier,\n autoResize,\n prevent,\n virtualScroll,\n overscroll,\n autoRaf,\n anchors,\n autoToggle,\n allowNestedScroll,\n __experimental__naiveDimensions\n };\n this.dimensions = new Dimensions(wrapper, content, { autoResize });\n this.updateClassName();\n this.targetScroll = this.animatedScroll = this.actualScroll;\n this.options.wrapper.addEventListener(\"scroll\", this.onNativeScroll, false);\n this.options.wrapper.addEventListener(\"scrollend\", this.onScrollEnd, {\n capture: true\n });\n if (this.options.anchors && this.options.wrapper === window) {\n this.options.wrapper.addEventListener(\n \"click\",\n this.onClick,\n false\n );\n }\n this.options.wrapper.addEventListener(\n \"pointerdown\",\n this.onPointerDown,\n false\n );\n this.virtualScroll = new VirtualScroll(eventsTarget, {\n touchMultiplier,\n wheelMultiplier\n });\n this.virtualScroll.on(\"scroll\", this.onVirtualScroll);\n if (this.options.autoToggle) {\n this.rootElement.addEventListener(\"transitionend\", this.onTransitionEnd, {\n passive: true\n });\n }\n if (this.options.autoRaf) {\n this.__rafID = requestAnimationFrame(this.raf);\n }\n }\n /**\n * Destroy the lenis instance, remove all event listeners and clean up the class name\n */\n destroy() {\n this.emitter.destroy();\n this.options.wrapper.removeEventListener(\n \"scroll\",\n this.onNativeScroll,\n false\n );\n this.options.wrapper.removeEventListener(\"scrollend\", this.onScrollEnd, {\n capture: true\n });\n this.options.wrapper.removeEventListener(\n \"pointerdown\",\n this.onPointerDown,\n false\n );\n if (this.options.anchors && this.options.wrapper === window) {\n this.options.wrapper.removeEventListener(\n \"click\",\n this.onClick,\n false\n );\n }\n this.virtualScroll.destroy();\n this.dimensions.destroy();\n this.cleanUpClassName();\n if (this.__rafID) {\n cancelAnimationFrame(this.__rafID);\n }\n }\n on(event, callback) {\n return this.emitter.on(event, callback);\n }\n off(event, callback) {\n return this.emitter.off(event, callback);\n }\n onScrollEnd = (e) => {\n if (!(e instanceof CustomEvent)) {\n if (this.isScrolling === \"smooth\" || this.isScrolling === false) {\n e.stopPropagation();\n }\n }\n };\n dispatchScrollendEvent = () => {\n this.options.wrapper.dispatchEvent(\n new CustomEvent(\"scrollend\", {\n bubbles: this.options.wrapper === window,\n // cancelable: false,\n detail: {\n lenisScrollEnd: true\n }\n })\n );\n };\n onTransitionEnd = (event) => {\n if (event.propertyName.includes(\"overflow\")) {\n const property = this.isHorizontal ? \"overflow-x\" : \"overflow-y\";\n const overflow = getComputedStyle(this.rootElement)[property];\n if ([\"hidden\", \"clip\"].includes(overflow)) {\n this.stop();\n } else {\n this.start();\n }\n }\n };\n setScroll(scroll) {\n if (this.isHorizontal) {\n this.options.wrapper.scrollTo({ left: scroll, behavior: \"instant\" });\n } else {\n this.options.wrapper.scrollTo({ top: scroll, behavior: \"instant\" });\n }\n }\n onClick = (event) => {\n const path = event.composedPath();\n const anchor = path.find(\n (node) => node instanceof HTMLAnchorElement && (node.getAttribute(\"href\")?.startsWith(\"#\") || node.getAttribute(\"href\")?.startsWith(\"/#\") || node.getAttribute(\"href\")?.startsWith(\"./#\"))\n );\n if (anchor) {\n const id = anchor.getAttribute(\"href\");\n if (id) {\n const options = typeof this.options.anchors === \"object\" && this.options.anchors ? this.options.anchors : void 0;\n let target = `#${id.split(\"#\")[1]}`;\n if ([\"#\", \"/#\", \"./#\", \"#top\", \"/#top\", \"./#top\"].includes(id)) {\n target = 0;\n }\n this.scrollTo(target, options);\n }\n }\n };\n onPointerDown = (event) => {\n if (event.button === 1) {\n this.reset();\n }\n };\n onVirtualScroll = (data) => {\n if (typeof this.options.virtualScroll === \"function\" && this.options.virtualScroll(data) === false)\n return;\n const { deltaX, deltaY, event } = data;\n this.emitter.emit(\"virtual-scroll\", { deltaX, deltaY, event });\n if (event.ctrlKey) return;\n if (event.lenisStopPropagation) return;\n const isTouch = event.type.includes(\"touch\");\n const isWheel = event.type.includes(\"wheel\");\n this.isTouching = event.type === \"touchstart\" || event.type === \"touchmove\";\n const isClickOrTap = deltaX === 0 && deltaY === 0;\n const isTapToStop = this.options.syncTouch && isTouch && event.type === \"touchstart\" && isClickOrTap && !this.isStopped && !this.isLocked;\n if (isTapToStop) {\n this.reset();\n return;\n }\n const isUnknownGesture = this.options.gestureOrientation === \"vertical\" && deltaY === 0 || this.options.gestureOrientation === \"horizontal\" && deltaX === 0;\n if (isClickOrTap || isUnknownGesture) {\n return;\n }\n let composedPath = event.composedPath();\n composedPath = composedPath.slice(0, composedPath.indexOf(this.rootElement));\n const prevent = this.options.prevent;\n if (!!composedPath.find(\n (node) => node instanceof HTMLElement && (typeof prevent === \"function\" && prevent?.(node) || node.hasAttribute?.(\"data-lenis-prevent\") || isTouch && node.hasAttribute?.(\"data-lenis-prevent-touch\") || isWheel && node.hasAttribute?.(\"data-lenis-prevent-wheel\") || this.options.allowNestedScroll && this.checkNestedScroll(node, { deltaX, deltaY }))\n ))\n return;\n if (this.isStopped || this.isLocked) {\n event.preventDefault();\n return;\n }\n const isSmooth = this.options.syncTouch && isTouch || this.options.smoothWheel && isWheel;\n if (!isSmooth) {\n this.isScrolling = \"native\";\n this.animate.stop();\n event.lenisStopPropagation = true;\n return;\n }\n let delta = deltaY;\n if (this.options.gestureOrientation === \"both\") {\n delta = Math.abs(deltaY) > Math.abs(deltaX) ? deltaY : deltaX;\n } else if (this.options.gestureOrientation === \"horizontal\") {\n delta = deltaX;\n }\n if (!this.options.overscroll || this.options.infinite || this.options.wrapper !== window && (this.animatedScroll > 0 && this.animatedScroll < this.limit || this.animatedScroll === 0 && deltaY > 0 || this.animatedScroll === this.limit && deltaY < 0)) {\n event.lenisStopPropagation = true;\n }\n event.preventDefault();\n const isSyncTouch = isTouch && this.options.syncTouch;\n const isTouchEnd = isTouch && event.type === \"touchend\";\n const hasTouchInertia = isTouchEnd && Math.abs(delta) > 5;\n if (hasTouchInertia) {\n delta = this.velocity * this.options.touchInertiaMultiplier;\n }\n this.scrollTo(this.targetScroll + delta, {\n programmatic: false,\n ...isSyncTouch ? {\n lerp: hasTouchInertia ? this.options.syncTouchLerp : 1\n // immediate: !hasTouchInertia,\n } : {\n lerp: this.options.lerp,\n duration: this.options.duration,\n easing: this.options.easing\n }\n });\n };\n /**\n * Force lenis to recalculate the dimensions\n */\n resize() {\n this.dimensions.resize();\n this.animatedScroll = this.targetScroll = this.actualScroll;\n this.emit();\n }\n emit() {\n this.emitter.emit(\"scroll\", this);\n }\n onNativeScroll = () => {\n if (this._resetVelocityTimeout !== null) {\n clearTimeout(this._resetVelocityTimeout);\n this._resetVelocityTimeout = null;\n }\n if (this._preventNextNativeScrollEvent) {\n this._preventNextNativeScrollEvent = false;\n return;\n }\n if (this.isScrolling === false || this.isScrolling === \"native\") {\n const lastScroll = this.animatedScroll;\n this.animatedScroll = this.targetScroll = this.actualScroll;\n this.lastVelocity = this.velocity;\n this.velocity = this.animatedScroll - lastScroll;\n this.direction = Math.sign(\n this.animatedScroll - lastScroll\n );\n if (!this.isStopped) {\n this.isScrolling = \"native\";\n }\n this.emit();\n if (this.velocity !== 0) {\n this._resetVelocityTimeout = setTimeout(() => {\n this.lastVelocity = this.velocity;\n this.velocity = 0;\n this.isScrolling = false;\n this.emit();\n }, 400);\n }\n }\n };\n reset() {\n this.isLocked = false;\n this.isScrolling = false;\n this.animatedScroll = this.targetScroll = this.actualScroll;\n this.lastVelocity = this.velocity = 0;\n this.animate.stop();\n }\n /**\n * Start lenis scroll after it has been stopped\n */\n start() {\n if (!this.isStopped) return;\n this.reset();\n this.isStopped = false;\n }\n /**\n * Stop lenis scroll\n */\n stop() {\n if (this.isStopped) return;\n this.reset();\n this.isStopped = true;\n }\n /**\n * RequestAnimationFrame for lenis\n *\n * @param time The time in ms from an external clock like `requestAnimationFrame` or Tempus\n */\n raf = (time) => {\n const deltaTime = time - (this.time || time);\n this.time = time;\n this.animate.advance(deltaTime * 1e-3);\n if (this.options.autoRaf) {\n this.__rafID = requestAnimationFrame(this.raf);\n }\n };\n /**\n * Scroll to a target value\n *\n * @param target The target value to scroll to\n * @param options The options for the scroll\n *\n * @example\n * lenis.scrollTo(100, {\n * offset: 100,\n * duration: 1,\n * easing: (t) => 1 - Math.cos((t * Math.PI) / 2),\n * lerp: 0.1,\n * onStart: () => {\n * console.log('onStart')\n * },\n * onComplete: () => {\n * console.log('onComplete')\n * },\n * })\n */\n scrollTo(target, {\n offset = 0,\n immediate = false,\n lock = false,\n duration = this.options.duration,\n easing = this.options.easing,\n lerp: lerp2 = this.options.lerp,\n onStart,\n onComplete,\n force = false,\n // scroll even if stopped\n programmatic = true,\n // called from outside of the class\n userData\n } = {}) {\n if ((this.isStopped || this.isLocked) && !force) return;\n if (typeof target === \"string\" && [\"top\", \"left\", \"start\"].includes(target)) {\n target = 0;\n } else if (typeof target === \"string\" && [\"bottom\", \"right\", \"end\"].includes(target)) {\n target = this.limit;\n } else {\n let node;\n if (typeof target === \"string\") {\n node = document.querySelector(target);\n } else if (target instanceof HTMLElement && target?.nodeType) {\n node = target;\n }\n if (node) {\n if (this.options.wrapper !== window) {\n const wrapperRect = this.rootElement.getBoundingClientRect();\n offset -= this.isHorizontal ? wrapperRect.left : wrapperRect.top;\n }\n const rect = node.getBoundingClientRect();\n target = (this.isHorizontal ? rect.left : rect.top) + this.animatedScroll;\n }\n }\n if (typeof target !== \"number\") return;\n target += offset;\n target = Math.round(target);\n if (this.options.infinite) {\n if (programmatic) {\n this.targetScroll = this.animatedScroll = this.scroll;\n const distance = target - this.animatedScroll;\n if (distance > this.limit / 2) {\n target = target - this.limit;\n } else if (distance < -this.limit / 2) {\n target = target + this.limit;\n }\n }\n } else {\n target = clamp(0, target, this.limit);\n }\n if (target === this.targetScroll) {\n onStart?.(this);\n onComplete?.(this);\n return;\n }\n this.userData = userData ?? {};\n if (immediate) {\n this.animatedScroll = this.targetScroll = target;\n this.setScroll(this.scroll);\n this.reset();\n this.preventNextNativeScrollEvent();\n this.emit();\n onComplete?.(this);\n this.userData = {};\n requestAnimationFrame(() => {\n this.dispatchScrollendEvent();\n });\n return;\n }\n if (!programmatic) {\n this.targetScroll = target;\n }\n this.animate.fromTo(this.animatedScroll, target, {\n duration,\n easing,\n lerp: lerp2,\n onStart: () => {\n if (lock) this.isLocked = true;\n this.isScrolling = \"smooth\";\n onStart?.(this);\n },\n onUpdate: (value, completed) => {\n this.isScrolling = \"smooth\";\n this.lastVelocity = this.velocity;\n this.velocity = value - this.animatedScroll;\n this.direction = Math.sign(this.velocity);\n this.animatedScroll = value;\n this.setScroll(this.scroll);\n if (programmatic) {\n this.targetScroll = value;\n }\n if (!completed) this.emit();\n if (completed) {\n this.reset();\n this.emit();\n onComplete?.(this);\n this.userData = {};\n requestAnimationFrame(() => {\n this.dispatchScrollendEvent();\n });\n this.preventNextNativeScrollEvent();\n }\n }\n });\n }\n preventNextNativeScrollEvent() {\n this._preventNextNativeScrollEvent = true;\n requestAnimationFrame(() => {\n this._preventNextNativeScrollEvent = false;\n });\n }\n checkNestedScroll(node, { deltaX, deltaY }) {\n const time = Date.now();\n const cache = node._lenis ??= {};\n let hasOverflowX, hasOverflowY, isScrollableX, isScrollableY, scrollWidth, scrollHeight, clientWidth, clientHeight;\n const gestureOrientation = this.options.gestureOrientation;\n if (time - (cache.time ?? 0) > 2e3) {\n cache.time = Date.now();\n const computedStyle = window.getComputedStyle(node);\n cache.computedStyle = computedStyle;\n const overflowXString = computedStyle.overflowX;\n const overflowYString = computedStyle.overflowY;\n hasOverflowX = [\"auto\", \"overlay\", \"scroll\"].includes(overflowXString);\n hasOverflowY = [\"auto\", \"overlay\", \"scroll\"].includes(overflowYString);\n cache.hasOverflowX = hasOverflowX;\n cache.hasOverflowY = hasOverflowY;\n if (!hasOverflowX && !hasOverflowY) return false;\n if (gestureOrientation === \"vertical\" && !hasOverflowY) return false;\n if (gestureOrientation === \"horizontal\" && !hasOverflowX) return false;\n scrollWidth = node.scrollWidth;\n scrollHeight = node.scrollHeight;\n clientWidth = node.clientWidth;\n clientHeight = node.clientHeight;\n isScrollableX = scrollWidth > clientWidth;\n isScrollableY = scrollHeight > clientHeight;\n cache.isScrollableX = isScrollableX;\n cache.isScrollableY = isScrollableY;\n cache.scrollWidth = scrollWidth;\n cache.scrollHeight = scrollHeight;\n cache.clientWidth = clientWidth;\n cache.clientHeight = clientHeight;\n } else {\n isScrollableX = cache.isScrollableX;\n isScrollableY = cache.isScrollableY;\n hasOverflowX = cache.hasOverflowX;\n hasOverflowY = cache.hasOverflowY;\n scrollWidth = cache.scrollWidth;\n scrollHeight = cache.scrollHeight;\n clientWidth = cache.clientWidth;\n clientHeight = cache.clientHeight;\n }\n if (!hasOverflowX && !hasOverflowY || !isScrollableX && !isScrollableY) {\n return false;\n }\n if (gestureOrientation === \"vertical\" && (!hasOverflowY || !isScrollableY))\n return false;\n if (gestureOrientation === \"horizontal\" && (!hasOverflowX || !isScrollableX))\n return false;\n let orientation;\n if (gestureOrientation === \"horizontal\") {\n orientation = \"x\";\n } else if (gestureOrientation === \"vertical\") {\n orientation = \"y\";\n } else {\n const isScrollingX = deltaX !== 0;\n const isScrollingY = deltaY !== 0;\n if (isScrollingX && hasOverflowX && isScrollableX) {\n orientation = \"x\";\n }\n if (isScrollingY && hasOverflowY && isScrollableY) {\n orientation = \"y\";\n }\n }\n if (!orientation) return false;\n let scroll, maxScroll, delta, hasOverflow, isScrollable;\n if (orientation === \"x\") {\n scroll = node.scrollLeft;\n maxScroll = scrollWidth - clientWidth;\n delta = deltaX;\n hasOverflow = hasOverflowX;\n isScrollable = isScrollableX;\n } else if (orientation === \"y\") {\n scroll = node.scrollTop;\n maxScroll = scrollHeight - clientHeight;\n delta = deltaY;\n hasOverflow = hasOverflowY;\n isScrollable = isScrollableY;\n } else {\n return false;\n }\n const willScroll = delta > 0 ? scroll < maxScroll : scroll > 0;\n return willScroll && hasOverflow && isScrollable;\n }\n /**\n * The root element on which lenis is instanced\n */\n get rootElement() {\n return this.options.wrapper === window ? document.documentElement : this.options.wrapper;\n }\n /**\n * The limit which is the maximum scroll value\n */\n get limit() {\n if (this.options.__experimental__naiveDimensions) {\n if (this.isHorizontal) {\n return this.rootElement.scrollWidth - this.rootElement.clientWidth;\n } else {\n return this.rootElement.scrollHeight - this.rootElement.clientHeight;\n }\n } else {\n return this.dimensions.limit[this.isHorizontal ? \"x\" : \"y\"];\n }\n }\n /**\n * Whether or not the scroll is horizontal\n */\n get isHorizontal() {\n return this.options.orientation === \"horizontal\";\n }\n /**\n * The actual scroll value\n */\n get actualScroll() {\n const wrapper = this.options.wrapper;\n return this.isHorizontal ? wrapper.scrollX ?? wrapper.scrollLeft : wrapper.scrollY ?? wrapper.scrollTop;\n }\n /**\n * The current scroll value\n */\n get scroll() {\n return this.options.infinite ? modulo(this.animatedScroll, this.limit) : this.animatedScroll;\n }\n /**\n * The progress of the scroll relative to the limit\n */\n get progress() {\n return this.limit === 0 ? 1 : this.scroll / this.limit;\n }\n /**\n * Current scroll state\n */\n get isScrolling() {\n return this._isScrolling;\n }\n set isScrolling(value) {\n if (this._isScrolling !== value) {\n this._isScrolling = value;\n this.updateClassName();\n }\n }\n /**\n * Check if lenis is stopped\n */\n get isStopped() {\n return this._isStopped;\n }\n set isStopped(value) {\n if (this._isStopped !== value) {\n this._isStopped = value;\n this.updateClassName();\n }\n }\n /**\n * Check if lenis is locked\n */\n get isLocked() {\n return this._isLocked;\n }\n set isLocked(value) {\n if (this._isLocked !== value) {\n this._isLocked = value;\n this.updateClassName();\n }\n }\n /**\n * Check if lenis is smooth scrolling\n */\n get isSmooth() {\n return this.isScrolling === \"smooth\";\n }\n /**\n * The class name applied to the wrapper element\n */\n get className() {\n let className = \"lenis\";\n if (this.options.autoToggle) className += \" lenis-autoToggle\";\n if (this.isStopped) className += \" lenis-stopped\";\n if (this.isLocked) className += \" lenis-locked\";\n if (this.isScrolling) className += \" lenis-scrolling\";\n if (this.isScrolling === \"smooth\") className += \" lenis-smooth\";\n return className;\n }\n updateClassName() {\n this.cleanUpClassName();\n this.rootElement.className = `${this.rootElement.className} ${this.className}`.trim();\n }\n cleanUpClassName() {\n this.rootElement.className = this.rootElement.className.replace(/lenis(-\\w+)?/g, \"\").trim();\n }\n};\nexport {\n Lenis as default\n};\n//# sourceMappingURL=lenis.mjs.map","import Lenis from 'lenis'\r\nclass FeatherScroll {\r\n // Stores all instances of FeatherScroll\r\n static instances = [];\r\n constructor(options = {}) {\r\n this.wrapper = options.wrapper || document.documentElement;\r\n this.content = options.content || document.body;\r\n // Initialize Lenis with custom options or defaults\r\n this.lenis = new Lenis({\r\n wrapper: this.wrapper,\r\n content: this.content,\r\n smooth: options.smooth ?? true,\r\n duration: options.duration ?? 1.2,\r\n easing: options.easing ?? ((t) => 1 - Math.pow(1 - t, 3)),\r\n direction: options.direction ?? 'vertical',\r\n gestureDirection: options.gestureDirection ?? 'both',\r\n wheelMultiplier: options.mouseSenstivity ?? 1,\r\n touchMultiplier: options.touchSenstivity ?? 2,\r\n infinite: options.infinite ?? false\r\n });\r\n // Scroll direction tracking\r\n this.scrollDirection = 'down';\r\n this.lastScroll = 0;\r\n // Elements with sticky and parallax behavior\r\n this.stickyElements = [...this.content.querySelectorAll('[data-scroll-sticky]')];\r\n this.parallaxElements = [...this.content.querySelectorAll('[data-scroll-speed]')];\r\n // Store initial positions for parallax elements\r\n this.parallaxElements.forEach((el) => {\r\n const rect = el.getBoundingClientRect();\r\n el.dataset.initialTop = rect.top + window.scrollY;\r\n el.dataset.initialLeft = rect.left + window.scrollX;\r\n });\r\n // Initialize features\r\n this.initStickyElements();\r\n this.trackScrollDirection();\r\n this.startRAF(); // Start animation loop\r\n FeatherScroll.instances.push(this); // Register instance\r\n if (window.ScrollTrigger) {\r\n this.setupScrollTrigger();\r\n }\r\n // Observe body overflow for automatic disabling\r\n this.observeBodyOverflow();\r\n }\r\n // RAF loop for Lenis + sticky + parallax\r\n startRAF() {\r\n const raf = (time) => {\r\n this.lenis.raf(time);\r\n this.updateStickyElements();\r\n this.updateParallax();\r\n requestAnimationFrame(raf);\r\n };\r\n requestAnimationFrame(raf);\r\n }\r\n // Detect scroll direction: 'up' or 'down'\r\n trackScrollDirection() {\r\n this.lenis.on('scroll', ({ scroll }) => {\r\n const newDirection = scroll > this.lastScroll ? 'down' : 'up';\r\n if (newDirection !== this.scrollDirection) {\r\n this.scrollDirection = newDirection;\r\n }\r\n this.lastScroll = scroll;\r\n });\r\n }\r\n // Observe overflow-y on body, pause/resume Lenis\r\n observeBodyOverflow() {\r\n const observer = new MutationObserver(() => {\r\n const overflowY = window.getComputedStyle(document.body).overflowY;\r\n if (overflowY === 'hidden') {\r\n this.lenis.stop();\r\n } else {\r\n this.lenis.start();\r\n }\r\n });\r\n observer.observe(document.body, {\r\n attributes: true,\r\n attributeFilter: ['style']\r\n });\r\n // Initial check\r\n const initialOverflowY = window.getComputedStyle(document.body).overflowY;\r\n if (initialOverflowY === 'hidden') {\r\n this.lenis.stop();\r\n }\r\n }\r\n // Return current scroll direction\r\n getScrollDirection() {\r\n return this.scrollDirection || 'down';\r\n }\r\n // Set initial positions for sticky elements\r\n initStickyElements() {\r\n this.stickyElements.forEach((el) => {\r\n const parent = el.parentElement;\r\n const rect = el.getBoundingClientRect();\r\n el.dataset.stickyStart = parent.offsetTop;\r\n el.dataset.stickyEnd = parent.offsetTop + parent.offsetHeight;\r\n el.dataset.originalWidth = `${rect.width}px`;\r\n el.dataset.originalHeight = `${rect.height}px`;\r\n });\r\n }\r\n // Update sticky element positions\r\n updateStickyElements() {\r\n const scrollY = this.lenis.scroll;\r\n const viewportHeight = window.innerHeight;\r\n this.stickyElements.forEach((el) => {\r\n const parent = el.parentElement;\r\n const nextSibling = parent.nextElementSibling;\r\n if (!nextSibling) return;\r\n const stickyStart = parseFloat(el.dataset.stickyStart);\r\n const stickyEnd = parseFloat(el.dataset.stickyEnd);\r\n const parentRect = parent.getBoundingClientRect();\r\n const nextRect = nextSibling.getBoundingClientRect();\r\n // If next section enters halfway viewport, stop sticking\r\n const isNextEntering = nextRect.top < viewportHeight * 0.5;\r\n if (scrollY >= stickyStart && scrollY < stickyEnd && !isNextEntering) {\r\n el.style.position = 'fixed';\r\n el.style.top = `${window.innerHeight / 2 - el.offsetHeight / 2}px`;\r\n el.style.left = `${parentRect.left + parentRect.width / 2 - el.offsetWidth / 2}px`;\r\n el.style.opacity = '1';\r\n } else {\r\n el.style.position = 'relative';\r\n el.style.opacity = '0';\r\n }\r\n });\r\n }\r\n // Apply parallax effect based on data attributes\r\n updateParallax() {\r\n const scrollY = this.lenis.scroll;\r\n this.parallaxElements.forEach((el) => {\r\n const speed = parseFloat(el.getAttribute(\"data-scroll-speed\")) || 1;\r\n const direction = el.getAttribute(\"data-scroll-direction\") || \"vertical\";\r\n const initialTop = parseFloat(el.dataset.initialTop);\r\n const initialLeft = parseFloat(el.dataset.initialLeft);\r\n let offsetX = 0, offsetY = 0;\r\n if (direction === \"horizontal\") {\r\n offsetX = (scrollY - initialTop) * speed * 0.1;\r\n } else if (direction === \"vertical\") {\r\n offsetY = (scrollY - initialTop) * speed * 0.1;\r\n } else if (direction === \"both\") {\r\n offsetX = (scrollY - initialTop) * speed * 0.1;\r\n offsetY = (scrollY - initialTop) * speed * 0.1;\r\n }\r\n // If GSAP is present, respect GSAP transforms\r\n let gsapX = 0, gsapY = 0;\r\n if (window.gsap) {\r\n gsapX = gsap.getProperty(el, \"x\") || 0;\r\n gsapY = gsap.getProperty(el, \"y\") || 0;\r\n }\r\n el.style.transform = `translate3d(${offsetX + gsapX}px, ${offsetY + gsapY}px, 0)`;\r\n });\r\n }\r\n // Integration with GSAP ScrollTrigger\r\n setupScrollTrigger() {\r\n this.lenis.on('scroll', () => {\r\n ScrollTrigger.update();\r\n });\r\n }\r\n // Public method: Scroll to a target\r\n scrollTo(target, options = {}) {\r\n this.lenis.scrollTo(target, options);\r\n }\r\n // Public method: Start scrolling\r\n start() {\r\n this.lenis.start();\r\n }\r\n // Public method: Stop scrolling\r\n stop() {\r\n this.lenis.stop();\r\n }\r\n // Public method: Destroy the instance\r\n destroy() {\r\n this.lenis.destroy();\r\n FeatherScroll.instances = FeatherScroll.instances.filter((instance) => instance !== this);\r\n }\r\n // Public method: Get scroll position\r\n getScrollPosition() {\r\n return this.lenis.scroll;\r\n }\r\n // Update Lenis options dynamically\r\n updateOptions(newOptions) {\r\n Object.assign(this.lenis.options, newOptions);\r\n }\r\n }\r\nexport default FeatherScroll;\r\n\r\n// Also attach to window for CDN users\r\nif (typeof window !== 'undefined') {\r\n window.FeatherScroll = 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e;emitter=new s;dimensions;virtualScroll;constructor({wrapper:t=window,content:e=document.documentElement,eventsTarget:s=t,smoothWheel:o=!0,syncTouch:n=!1,syncTouchLerp:l=.075,touchInertiaMultiplier:h=35,duration:a,easing:c=t=>Math.min(1,1.001-Math.pow(2,-10*t)),lerp:p=.1,infinite:d=!1,orientation:u="vertical",gestureOrientation:m="vertical",touchMultiplier:v=1,wheelMultiplier:g=1,autoResize:w=!0,prevent:S,virtualScroll:f,overscroll:y=!0,autoRaf:E=!1,anchors:T=!1,autoToggle:b=!1,allowNestedScroll:z=!1,__experimental__naiveDimensions:R=!1}={}){window.lenisVersion="1.3.1",t&&t!==document.documentElement||(t=window),this.options={wrapper:t,content:e,eventsTarget:s,smoothWheel:o,syncTouch:n,syncTouchLerp:l,touchInertiaMultiplier:h,duration:a,easing:c,lerp:p,infinite:d,gestureOrientation:m,orientation:u,touchMultiplier:v,wheelMultiplier:g,autoResize:w,prevent:S,virtualScroll:f,overscroll:y,autoRaf:E,anchors:T,autoToggle:b,allowNestedScroll:z,__experimental__naiveDimensions:R},this.dimensions=new i(t,e,{autoResize:w}),this.updateClassName(),this.targetScroll=this.animatedScroll=this.actualScroll,this.options.wrapper.addEventListener("scroll",this.onNativeScroll,!1),this.options.wrapper.addEventListener("scrollend",this.onScrollEnd,{capture:!0}),this.options.anchors&&this.options.wrapper===window&&this.options.wrapper.addEventListener("click",this.onClick,!1),this.options.wrapper.addEventListener("pointerdown",this.onPointerDown,!1),this.virtualScroll=new r(s,{touchMultiplier:v,wheelMultiplier:g}),this.virtualScroll.on("scroll",this.onVirtualScroll),this.options.autoToggle&&this.rootElement.addEventListener("transitionend",this.onTransitionEnd,{passive:!0}),this.options.autoRaf&&(this.__rafID=requestAnimationFrame(this.raf))}destroy(){this.emitter.destroy(),this.options.wrapper.removeEventListener("scroll",this.onNativeScroll,!1),this.options.wrapper.removeEventListener("scrollend",this.onScrollEnd,{capture:!0}),this.options.wrapper.removeEventListener("pointerdown",this.onPointerDown,!1),this.options.anchors&&this.options.wrapper===window&&this.options.wrapper.removeEventListener("click",this.onClick,!1),this.virtualScroll.destroy(),this.dimensions.destroy(),this.cleanUpClassName(),this.__rafID&&cancelAnimationFrame(this.__rafID)}on(t,e){return this.emitter.on(t,e)}off(t,e){return this.emitter.off(t,e)}onScrollEnd=t=>{t instanceof CustomEvent||"smooth"!==this.isScrolling&&!1!==this.isScrolling||t.stopPropagation()};dispatchScrollendEvent=()=>{this.options.wrapper.dispatchEvent(new CustomEvent("scrollend",{bubbles:this.options.wrapper===window,detail:{lenisScrollEnd:!0}}))};onTransitionEnd=t=>{if(t.propertyName.includes("overflow")){const t=this.isHorizontal?"overflow-x":"overflow-y",e=getComputedStyle(this.rootElement)[t];["hidden","clip"].includes(e)?this.stop():this.start()}};setScroll(t){this.isHorizontal?this.options.wrapper.scrollTo({left:t,behavior:"instant"}):this.options.wrapper.scrollTo({top:t,behavior:"instant"})}onClick=t=>{const e=t.composedPath().find((t=>t instanceof HTMLAnchorElement&&(t.getAttribute("href")?.startsWith("#")||t.getAttribute("href")?.startsWith("/#")||t.getAttribute("href")?.startsWith("./#"))));if(e){const t=e.getAttribute("href");if(t){const e="object"==typeof this.options.anchors&&this.options.anchors?this.options.anchors:void 0;let i=`#${t.split("#")[1]}`;["#","/#","./#","#top","/#top","./#top"].includes(t)&&(i=0),this.scrollTo(i,e)}}};onPointerDown=t=>{1===t.button&&this.reset()};onVirtualScroll=t=>{if("function"==typeof this.options.virtualScroll&&!1===this.options.virtualScroll(t))return;const{deltaX:e,deltaY:i,event:s}=t;if(this.emitter.emit("virtual-scroll",{deltaX:e,deltaY:i,event:s}),s.ctrlKey)return;if(s.lenisStopPropagation)return;const o=s.type.includes("touch"),n=s.type.includes("wheel");this.isTouching="touchstart"===s.type||"touchmove"===s.type;const r=0===e&&0===i;if(this.options.syncTouch&&o&&"touchstart"===s.type&&r&&!this.isStopped&&!this.isLocked)return void this.reset();const l="vertical"===this.options.gestureOrientation&&0===i||"horizontal"===this.options.gestureOrientation&&0===e;if(r||l)return;let h=s.composedPath();h=h.slice(0,h.indexOf(this.rootElement));const a=this.options.prevent;if(h.find((t=>t instanceof HTMLElement&&("function"==typeof a&&a?.(t)||t.hasAttribute?.("data-lenis-prevent")||o&&t.hasAttribute?.("data-lenis-prevent-touch")||n&&t.hasAttribute?.("data-lenis-prevent-wheel")||this.options.allowNestedScroll&&this.checkNestedScroll(t,{deltaX:e,deltaY:i})))))return;if(this.isStopped||this.isLocked)return void s.preventDefault();if(!(this.options.syncTouch&&o||this.options.smoothWheel&&n))return this.isScrolling="native",this.animate.stop(),void(s.lenisStopPropagation=!0);let c=i;"both"===this.options.gestureOrientation?c=Math.abs(i)>Math.abs(e)?i:e:"horizontal"===this.options.gestureOrientation&&(c=e),(!this.options.overscroll||this.options.infinite||this.options.wrapper!==window&&(this.animatedScroll>0&&this.animatedScroll0||this.animatedScroll===this.limit&&i<0))&&(s.lenisStopPropagation=!0),s.preventDefault();const p=o&&this.options.syncTouch,d=o&&"touchend"===s.type&&Math.abs(c)>5;d&&(c=this.velocity*this.options.touchInertiaMultiplier),this.scrollTo(this.targetScroll+c,{programmatic:!1,...p?{lerp:d?this.options.syncTouchLerp:1}:{lerp:this.options.lerp,duration:this.options.duration,easing:this.options.easing}})};resize(){this.dimensions.resize(),this.animatedScroll=this.targetScroll=this.actualScroll,this.emit()}emit(){this.emitter.emit("scroll",this)}onNativeScroll=()=>{if(null!==this._resetVelocityTimeout&&(clearTimeout(this._resetVelocityTimeout),this._resetVelocityTimeout=null),this._preventNextNativeScrollEvent)this._preventNextNativeScrollEvent=!1;else if(!1===this.isScrolling||"native"===this.isScrolling){const t=this.animatedScroll;this.animatedScroll=this.targetScroll=this.actualScroll,this.lastVelocity=this.velocity,this.velocity=this.animatedScroll-t,this.direction=Math.sign(this.animatedScroll-t),this.isStopped||(this.isScrolling="native"),this.emit(),0!==this.velocity&&(this._resetVelocityTimeout=setTimeout((()=>{this.lastVelocity=this.velocity,this.velocity=0,this.isScrolling=!1,this.emit()}),400))}};reset(){this.isLocked=!1,this.isScrolling=!1,this.animatedScroll=this.targetScroll=this.actualScroll,this.lastVelocity=this.velocity=0,this.animate.stop()}start(){this.isStopped&&(this.reset(),this.isStopped=!1)}stop(){this.isStopped||(this.reset(),this.isStopped=!0)}raf=t=>{const e=t-(this.time||t);this.time=t,this.animate.advance(.001*e),this.options.autoRaf&&(this.__rafID=requestAnimationFrame(this.raf))};scrollTo(e,{offset:i=0,immediate:s=!1,lock:o=!1,duration:n=this.options.duration,easing:r=this.options.easing,lerp:l=this.options.lerp,onStart:h,onComplete:a,force:c=!1,programmatic:p=!0,userData:d}={}){if(!this.isStopped&&!this.isLocked||c){if("string"==typeof e&&["top","left","start"].includes(e))e=0;else if("string"==typeof e&&["bottom","right","end"].includes(e))e=this.limit;else{let t;if("string"==typeof e?t=document.querySelector(e):e instanceof HTMLElement&&e?.nodeType&&(t=e),t){if(this.options.wrapper!==window){const t=this.rootElement.getBoundingClientRect();i-=this.isHorizontal?t.left:t.top}const s=t.getBoundingClientRect();e=(this.isHorizontal?s.left:s.top)+this.animatedScroll}}if("number"==typeof e){if(e+=i,e=Math.round(e),this.options.infinite){if(p){this.targetScroll=this.animatedScroll=this.scroll;const t=e-this.animatedScroll;t>this.limit/2?e-=this.limit:t<-this.limit/2&&(e+=this.limit)}}else e=t(0,e,this.limit);if(e===this.targetScroll)return h?.(this),void a?.(this);if(this.userData=d??{},s)return this.animatedScroll=this.targetScroll=e,this.setScroll(this.scroll),this.reset(),this.preventNextNativeScrollEvent(),this.emit(),a?.(this),this.userData={},void requestAnimationFrame((()=>{this.dispatchScrollendEvent()}));p||(this.targetScroll=e),this.animate.fromTo(this.animatedScroll,e,{duration:n,easing:r,lerp:l,onStart:()=>{o&&(this.isLocked=!0),this.isScrolling="smooth",h?.(this)},onUpdate:(t,e)=>{this.isScrolling="smooth",this.lastVelocity=this.velocity,this.velocity=t-this.animatedScroll,this.direction=Math.sign(this.velocity),this.animatedScroll=t,this.setScroll(this.scroll),p&&(this.targetScroll=t),e||this.emit(),e&&(this.reset(),this.emit(),a?.(this),this.userData={},requestAnimationFrame((()=>{this.dispatchScrollendEvent()})),this.preventNextNativeScrollEvent())}})}}}preventNextNativeScrollEvent(){this._preventNextNativeScrollEvent=!0,requestAnimationFrame((()=>{this._preventNextNativeScrollEvent=!1}))}checkNestedScroll(t,{deltaX:e,deltaY:i}){const s=Date.now(),o=t._lenis??={};let n,r,l,h,a,c,p,d;const u=this.options.gestureOrientation;if(s-(o.time??0)>2e3){o.time=Date.now();const e=window.getComputedStyle(t);o.computedStyle=e;const i=e.overflowX,s=e.overflowY;if(n=["auto","overlay","scroll"].includes(i),r=["auto","overlay","scroll"].includes(s),o.hasOverflowX=n,o.hasOverflowY=r,!n&&!r)return!1;if("vertical"===u&&!r)return!1;if("horizontal"===u&&!n)return!1;a=t.scrollWidth,c=t.scrollHeight,p=t.clientWidth,d=t.clientHeight,l=a>p,h=c>d,o.isScrollableX=l,o.isScrollableY=h,o.scrollWidth=a,o.scrollHeight=c,o.clientWidth=p,o.clientHeight=d}else l=o.isScrollableX,h=o.isScrollableY,n=o.hasOverflowX,r=o.hasOverflowY,a=o.scrollWidth,c=o.scrollHeight,p=o.clientWidth,d=o.clientHeight;if(!n&&!r||!l&&!h)return!1;if(!("vertical"!==u||r&&h))return!1;if(!("horizontal"!==u||n&&l))return!1;let m,v,g,w,S,f;if("horizontal"===u)m="x";else if("vertical"===u)m="y";else{0!==e&&n&&l&&(m="x"),0!==i&&r&&h&&(m="y")}if(!m)return!1;if("x"===m)v=t.scrollLeft,g=a-p,w=e,S=n,f=l;else{if("y"!==m)return!1;v=t.scrollTop,g=c-d,w=i,S=r,f=h}return(w>0?v0)&&S&&f}get rootElement(){return this.options.wrapper===window?document.documentElement:this.options.wrapper}get limit(){return this.options.__experimental__naiveDimensions?this.isHorizontal?this.rootElement.scrollWidth-this.rootElement.clientWidth:this.rootElement.scrollHeight-this.rootElement.clientHeight:this.dimensions.limit[this.isHorizontal?"x":"y"]}get isHorizontal(){return"horizontal"===this.options.orientation}get actualScroll(){const t=this.options.wrapper;return this.isHorizontal?t.scrollX??t.scrollLeft:t.scrollY??t.scrollTop}get scroll(){return this.options.infinite?(t=this.animatedScroll,e=this.limit,(t%e+e)%e):this.animatedScroll;var t,e}get progress(){return 0===this.limit?1:this.scroll/this.limit}get isScrolling(){return this._isScrolling}set isScrolling(t){this._isScrolling!==t&&(this._isScrolling=t,this.updateClassName())}get isStopped(){return this._isStopped}set isStopped(t){this._isStopped!==t&&(this._isStopped=t,this.updateClassName())}get isLocked(){return this._isLocked}set isLocked(t){this._isLocked!==t&&(this._isLocked=t,this.updateClassName())}get isSmooth(){return"smooth"===this.isScrolling}get className(){let t="lenis";return this.options.autoToggle&&(t+=" lenis-autoToggle"),this.isStopped&&(t+=" lenis-stopped"),this.isLocked&&(t+=" lenis-locked"),this.isScrolling&&(t+=" lenis-scrolling"),"smooth"===this.isScrolling&&(t+=" lenis-smooth"),t}updateClassName(){this.cleanUpClassName(),this.rootElement.className=`${this.rootElement.className} ${this.className}`.trim()}cleanUpClassName(){this.rootElement.className=this.rootElement.className.replace(/lenis(-\w+)?/g,"").trim()}};class h{static instances=[];constructor(t={}){this.wrapper=t.wrapper||document.documentElement,this.content=t.content||document.body,this.lenis=new l({wrapper:this.wrapper,content:this.content,smooth:t.smooth??!0,duration:t.duration??1.2,easing:t.easing??(t=>1-Math.pow(1-t,3)),direction:t.direction??"vertical",gestureDirection:t.gestureDirection??"both",wheelMultiplier:t.mouseSenstivity??1,touchMultiplier:t.touchSenstivity??2,infinite:t.infinite??!1}),this.scrollDirection="down",this.lastScroll=0,this.stickyElements=[...this.content.querySelectorAll("[data-scroll-sticky]")],this.parallaxElements=[...this.content.querySelectorAll("[data-scroll-speed]")],this.parallaxElements.forEach((t=>{const e=t.getBoundingClientRect();t.dataset.initialTop=e.top+window.scrollY,t.dataset.initialLeft=e.left+window.scrollX})),this.initStickyElements(),this.trackScrollDirection(),this.startRAF(),h.instances.push(this),window.ScrollTrigger&&this.setupScrollTrigger(),this.observeBodyOverflow()}startRAF(){const t=e=>{this.lenis.raf(e),this.updateStickyElements(),this.updateParallax(),requestAnimationFrame(t)};requestAnimationFrame(t)}trackScrollDirection(){this.lenis.on("scroll",(({scroll:t})=>{const e=t>this.lastScroll?"down":"up";e!==this.scrollDirection&&(this.scrollDirection=e),this.lastScroll=t}))}observeBodyOverflow(){new MutationObserver((()=>{"hidden"===window.getComputedStyle(document.body).overflowY?this.lenis.stop():this.lenis.start()})).observe(document.body,{attributes:!0,attributeFilter:["style"]});"hidden"===window.getComputedStyle(document.body).overflowY&&this.lenis.stop()}getScrollDirection(){return this.scrollDirection||"down"}initStickyElements(){this.stickyElements.forEach((t=>{const e=t.parentElement,i=t.getBoundingClientRect();t.dataset.stickyStart=e.offsetTop,t.dataset.stickyEnd=e.offsetTop+e.offsetHeight,t.dataset.originalWidth=`${i.width}px`,t.dataset.originalHeight=`${i.height}px`}))}updateStickyElements(){const t=this.lenis.scroll,e=window.innerHeight;this.stickyElements.forEach((i=>{const s=i.parentElement,o=s.nextElementSibling;if(!o)return;const n=parseFloat(i.dataset.stickyStart),r=parseFloat(i.dataset.stickyEnd),l=s.getBoundingClientRect(),h=o.getBoundingClientRect().top<.5*e;t>=n&&t{const i=parseFloat(e.getAttribute("data-scroll-speed"))||1,s=e.getAttribute("data-scroll-direction")||"vertical",o=parseFloat(e.dataset.initialTop);parseFloat(e.dataset.initialLeft);let n=0,r=0;"horizontal"===s?n=(t-o)*i*.1:"vertical"===s?r=(t-o)*i*.1:"both"===s&&(n=(t-o)*i*.1,r=(t-o)*i*.1);let l=0,h=0;window.gsap&&(l=gsap.getProperty(e,"x")||0,h=gsap.getProperty(e,"y")||0),e.style.transform=`translate3d(${n+l}px, ${r+h}px, 0)`}))}setupScrollTrigger(){this.lenis.on("scroll",(()=>{ScrollTrigger.update()}))}scrollTo(t,e={}){this.lenis.scrollTo(t,e)}start(){this.lenis.start()}stop(){this.lenis.stop()}destroy(){this.lenis.destroy(),h.instances=h.instances.filter((t=>t!==this))}getScrollPosition(){return this.lenis.scroll}updateOptions(t){Object.assign(this.lenis.options,t)}}return"undefined"!=typeof window&&(window.FeatherScroll=h),h}(); 2 | //# sourceMappingURL=featherScroll.min.js.map 3 | -------------------------------------------------------------------------------- /dist/featherScroll.min.js.map: -------------------------------------------------------------------------------- 1 | {"version":3,"file":"featherScroll.min.js","sources":["../node_modules/lenis/dist/lenis.mjs","../src/featherScroll.js"],"sourcesContent":["// package.json\nvar version = \"1.3.1\";\n\n// packages/core/src/maths.ts\nfunction clamp(min, input, max) {\n return Math.max(min, Math.min(input, max));\n}\nfunction lerp(x, y, t) {\n return (1 - t) * x + t * y;\n}\nfunction damp(x, y, lambda, deltaTime) {\n return lerp(x, y, 1 - Math.exp(-lambda * deltaTime));\n}\nfunction modulo(n, d) {\n return (n % d + d) % d;\n}\n\n// packages/core/src/animate.ts\nvar Animate = class {\n isRunning = false;\n value = 0;\n from = 0;\n to = 0;\n currentTime = 0;\n // These are instanciated in the fromTo method\n lerp;\n duration;\n easing;\n onUpdate;\n /**\n * Advance the animation by the given delta time\n *\n * @param deltaTime - The time in seconds to advance the animation\n */\n advance(deltaTime) {\n if (!this.isRunning) return;\n let completed = false;\n if (this.duration && this.easing) {\n this.currentTime += deltaTime;\n const linearProgress = clamp(0, this.currentTime / this.duration, 1);\n completed = linearProgress >= 1;\n const easedProgress = completed ? 1 : this.easing(linearProgress);\n this.value = this.from + (this.to - this.from) * easedProgress;\n } else if (this.lerp) {\n this.value = damp(this.value, this.to, this.lerp * 60, deltaTime);\n if (Math.round(this.value) === this.to) {\n this.value = this.to;\n completed = true;\n }\n } else {\n this.value = this.to;\n completed = true;\n }\n if (completed) {\n this.stop();\n }\n this.onUpdate?.(this.value, completed);\n }\n /** Stop the animation */\n stop() {\n this.isRunning = false;\n }\n /**\n * Set up the animation from a starting value to an ending value\n * with optional parameters for lerping, duration, easing, and onUpdate callback\n *\n * @param from - The starting value\n * @param to - The ending value\n * @param options - Options for the animation\n */\n fromTo(from, to, { lerp: lerp2, duration, easing, onStart, onUpdate }) {\n this.from = this.value = from;\n this.to = to;\n this.lerp = lerp2;\n this.duration = duration;\n this.easing = easing;\n this.currentTime = 0;\n this.isRunning = true;\n onStart?.();\n this.onUpdate = onUpdate;\n }\n};\n\n// packages/core/src/debounce.ts\nfunction debounce(callback, delay) {\n let timer;\n return function(...args) {\n let context = this;\n clearTimeout(timer);\n timer = setTimeout(() => {\n timer = void 0;\n callback.apply(context, args);\n }, delay);\n };\n}\n\n// packages/core/src/dimensions.ts\nvar Dimensions = class {\n constructor(wrapper, content, { autoResize = true, debounce: debounceValue = 250 } = {}) {\n this.wrapper = wrapper;\n this.content = content;\n if (autoResize) {\n this.debouncedResize = debounce(this.resize, debounceValue);\n if (this.wrapper instanceof Window) {\n window.addEventListener(\"resize\", this.debouncedResize, false);\n } else {\n this.wrapperResizeObserver = new ResizeObserver(this.debouncedResize);\n this.wrapperResizeObserver.observe(this.wrapper);\n }\n this.contentResizeObserver = new ResizeObserver(this.debouncedResize);\n this.contentResizeObserver.observe(this.content);\n }\n this.resize();\n }\n width = 0;\n height = 0;\n scrollHeight = 0;\n scrollWidth = 0;\n // These are instanciated in the constructor as they need information from the options\n debouncedResize;\n wrapperResizeObserver;\n contentResizeObserver;\n destroy() {\n this.wrapperResizeObserver?.disconnect();\n this.contentResizeObserver?.disconnect();\n if (this.wrapper === window && this.debouncedResize) {\n window.removeEventListener(\"resize\", this.debouncedResize, false);\n }\n }\n resize = () => {\n this.onWrapperResize();\n this.onContentResize();\n };\n onWrapperResize = () => {\n if (this.wrapper instanceof Window) {\n this.width = window.innerWidth;\n this.height = window.innerHeight;\n } else {\n this.width = this.wrapper.clientWidth;\n this.height = this.wrapper.clientHeight;\n }\n };\n onContentResize = () => {\n if (this.wrapper instanceof Window) {\n this.scrollHeight = this.content.scrollHeight;\n this.scrollWidth = this.content.scrollWidth;\n } else {\n this.scrollHeight = this.wrapper.scrollHeight;\n this.scrollWidth = this.wrapper.scrollWidth;\n }\n };\n get limit() {\n return {\n x: this.scrollWidth - this.width,\n y: this.scrollHeight - this.height\n };\n }\n};\n\n// packages/core/src/emitter.ts\nvar Emitter = class {\n events = {};\n /**\n * Emit an event with the given data\n * @param event Event name\n * @param args Data to pass to the event handlers\n */\n emit(event, ...args) {\n let callbacks = this.events[event] || [];\n for (let i = 0, length = callbacks.length; i < length; i++) {\n callbacks[i]?.(...args);\n }\n }\n /**\n * Add a callback to the event\n * @param event Event name\n * @param cb Callback function\n * @returns Unsubscribe function\n */\n on(event, cb) {\n this.events[event]?.push(cb) || (this.events[event] = [cb]);\n return () => {\n this.events[event] = this.events[event]?.filter((i) => cb !== i);\n };\n }\n /**\n * Remove a callback from the event\n * @param event Event name\n * @param callback Callback function\n */\n off(event, callback) {\n this.events[event] = this.events[event]?.filter((i) => callback !== i);\n }\n /**\n * Remove all event listeners and clean up\n */\n destroy() {\n this.events = {};\n }\n};\n\n// packages/core/src/virtual-scroll.ts\nvar LINE_HEIGHT = 100 / 6;\nvar listenerOptions = { passive: false };\nvar VirtualScroll = class {\n constructor(element, options = { wheelMultiplier: 1, touchMultiplier: 1 }) {\n this.element = element;\n this.options = options;\n window.addEventListener(\"resize\", this.onWindowResize, false);\n this.onWindowResize();\n this.element.addEventListener(\"wheel\", this.onWheel, listenerOptions);\n this.element.addEventListener(\n \"touchstart\",\n this.onTouchStart,\n listenerOptions\n );\n this.element.addEventListener(\n \"touchmove\",\n this.onTouchMove,\n listenerOptions\n );\n this.element.addEventListener(\"touchend\", this.onTouchEnd, listenerOptions);\n }\n touchStart = {\n x: 0,\n y: 0\n };\n lastDelta = {\n x: 0,\n y: 0\n };\n window = {\n width: 0,\n height: 0\n };\n emitter = new Emitter();\n /**\n * Add an event listener for the given event and callback\n *\n * @param event Event name\n * @param callback Callback function\n */\n on(event, callback) {\n return this.emitter.on(event, callback);\n }\n /** Remove all event listeners and clean up */\n destroy() {\n this.emitter.destroy();\n window.removeEventListener(\"resize\", this.onWindowResize, false);\n this.element.removeEventListener(\"wheel\", this.onWheel, listenerOptions);\n this.element.removeEventListener(\n \"touchstart\",\n this.onTouchStart,\n listenerOptions\n );\n this.element.removeEventListener(\n \"touchmove\",\n this.onTouchMove,\n listenerOptions\n );\n this.element.removeEventListener(\n \"touchend\",\n this.onTouchEnd,\n listenerOptions\n );\n }\n /**\n * Event handler for 'touchstart' event\n *\n * @param event Touch event\n */\n onTouchStart = (event) => {\n const { clientX, clientY } = event.targetTouches ? event.targetTouches[0] : event;\n this.touchStart.x = clientX;\n this.touchStart.y = clientY;\n this.lastDelta = {\n x: 0,\n y: 0\n };\n this.emitter.emit(\"scroll\", {\n deltaX: 0,\n deltaY: 0,\n event\n });\n };\n /** Event handler for 'touchmove' event */\n onTouchMove = (event) => {\n const { clientX, clientY } = event.targetTouches ? event.targetTouches[0] : event;\n const deltaX = -(clientX - this.touchStart.x) * this.options.touchMultiplier;\n const deltaY = -(clientY - this.touchStart.y) * this.options.touchMultiplier;\n this.touchStart.x = clientX;\n this.touchStart.y = clientY;\n this.lastDelta = {\n x: deltaX,\n y: deltaY\n };\n this.emitter.emit(\"scroll\", {\n deltaX,\n deltaY,\n event\n });\n };\n onTouchEnd = (event) => {\n this.emitter.emit(\"scroll\", {\n deltaX: this.lastDelta.x,\n deltaY: this.lastDelta.y,\n event\n });\n };\n /** Event handler for 'wheel' event */\n onWheel = (event) => {\n let { deltaX, deltaY, deltaMode } = event;\n const multiplierX = deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.window.width : 1;\n const multiplierY = deltaMode === 1 ? LINE_HEIGHT : deltaMode === 2 ? this.window.height : 1;\n deltaX *= multiplierX;\n deltaY *= multiplierY;\n deltaX *= this.options.wheelMultiplier;\n deltaY *= this.options.wheelMultiplier;\n this.emitter.emit(\"scroll\", { deltaX, deltaY, event });\n };\n onWindowResize = () => {\n this.window = {\n width: window.innerWidth,\n height: window.innerHeight\n };\n };\n};\n\n// packages/core/src/lenis.ts\nvar Lenis = class {\n _isScrolling = false;\n // true when scroll is animating\n _isStopped = false;\n // true if user should not be able to scroll - enable/disable programmatically\n _isLocked = false;\n // same as isStopped but enabled/disabled when scroll reaches target\n _preventNextNativeScrollEvent = false;\n _resetVelocityTimeout = null;\n __rafID = null;\n /**\n * Whether or not the user is touching the screen\n */\n isTouching;\n /**\n * The time in ms since the lenis instance was created\n */\n time = 0;\n /**\n * User data that will be forwarded through the scroll event\n *\n * @example\n * lenis.scrollTo(100, {\n * userData: {\n * foo: 'bar'\n * }\n * })\n */\n userData = {};\n /**\n * The last velocity of the scroll\n */\n lastVelocity = 0;\n /**\n * The current velocity of the scroll\n */\n velocity = 0;\n /**\n * The direction of the scroll\n */\n direction = 0;\n /**\n * The options passed to the lenis instance\n */\n options;\n /**\n * The target scroll value\n */\n targetScroll;\n /**\n * The animated scroll value\n */\n animatedScroll;\n // These are instanciated here as they don't need information from the options\n animate = new Animate();\n emitter = new Emitter();\n // These are instanciated in the constructor as they need information from the options\n dimensions;\n // This is not private because it's used in the Snap class\n virtualScroll;\n constructor({\n wrapper = window,\n content = document.documentElement,\n eventsTarget = wrapper,\n smoothWheel = true,\n syncTouch = false,\n syncTouchLerp = 0.075,\n touchInertiaMultiplier = 35,\n duration,\n // in seconds\n easing = (t) => Math.min(1, 1.001 - Math.pow(2, -10 * t)),\n lerp: lerp2 = 0.1,\n infinite = false,\n orientation = \"vertical\",\n // vertical, horizontal\n gestureOrientation = \"vertical\",\n // vertical, horizontal, both\n touchMultiplier = 1,\n wheelMultiplier = 1,\n autoResize = true,\n prevent,\n virtualScroll,\n overscroll = true,\n autoRaf = false,\n anchors = false,\n autoToggle = false,\n // https://caniuse.com/?search=transition-behavior\n allowNestedScroll = false,\n __experimental__naiveDimensions = false\n } = {}) {\n window.lenisVersion = version;\n if (!wrapper || wrapper === document.documentElement) {\n wrapper = window;\n }\n this.options = {\n wrapper,\n content,\n eventsTarget,\n smoothWheel,\n syncTouch,\n syncTouchLerp,\n touchInertiaMultiplier,\n duration,\n easing,\n lerp: lerp2,\n infinite,\n gestureOrientation,\n orientation,\n touchMultiplier,\n wheelMultiplier,\n autoResize,\n prevent,\n virtualScroll,\n overscroll,\n autoRaf,\n anchors,\n autoToggle,\n allowNestedScroll,\n __experimental__naiveDimensions\n };\n this.dimensions = new Dimensions(wrapper, content, { autoResize });\n this.updateClassName();\n this.targetScroll = this.animatedScroll = this.actualScroll;\n this.options.wrapper.addEventListener(\"scroll\", this.onNativeScroll, false);\n this.options.wrapper.addEventListener(\"scrollend\", this.onScrollEnd, {\n capture: true\n });\n if (this.options.anchors && this.options.wrapper === window) {\n this.options.wrapper.addEventListener(\n \"click\",\n this.onClick,\n false\n );\n }\n this.options.wrapper.addEventListener(\n \"pointerdown\",\n this.onPointerDown,\n false\n );\n this.virtualScroll = new VirtualScroll(eventsTarget, {\n touchMultiplier,\n wheelMultiplier\n });\n this.virtualScroll.on(\"scroll\", this.onVirtualScroll);\n if (this.options.autoToggle) {\n this.rootElement.addEventListener(\"transitionend\", this.onTransitionEnd, {\n passive: true\n });\n }\n if (this.options.autoRaf) {\n this.__rafID = requestAnimationFrame(this.raf);\n }\n }\n /**\n * Destroy the lenis instance, remove all event listeners and clean up the class name\n */\n destroy() {\n this.emitter.destroy();\n this.options.wrapper.removeEventListener(\n \"scroll\",\n this.onNativeScroll,\n false\n );\n this.options.wrapper.removeEventListener(\"scrollend\", this.onScrollEnd, {\n capture: true\n });\n this.options.wrapper.removeEventListener(\n \"pointerdown\",\n this.onPointerDown,\n false\n );\n if (this.options.anchors && this.options.wrapper === window) {\n this.options.wrapper.removeEventListener(\n \"click\",\n this.onClick,\n false\n );\n }\n this.virtualScroll.destroy();\n this.dimensions.destroy();\n this.cleanUpClassName();\n if (this.__rafID) {\n cancelAnimationFrame(this.__rafID);\n }\n }\n on(event, callback) {\n return this.emitter.on(event, callback);\n }\n off(event, callback) {\n return this.emitter.off(event, callback);\n }\n onScrollEnd = (e) => {\n if (!(e instanceof CustomEvent)) {\n if (this.isScrolling === \"smooth\" || this.isScrolling === false) {\n e.stopPropagation();\n }\n }\n };\n dispatchScrollendEvent = () => {\n this.options.wrapper.dispatchEvent(\n new CustomEvent(\"scrollend\", {\n bubbles: this.options.wrapper === window,\n // cancelable: false,\n detail: {\n lenisScrollEnd: true\n }\n })\n );\n };\n onTransitionEnd = (event) => {\n if (event.propertyName.includes(\"overflow\")) {\n const property = this.isHorizontal ? \"overflow-x\" : \"overflow-y\";\n const overflow = getComputedStyle(this.rootElement)[property];\n if ([\"hidden\", \"clip\"].includes(overflow)) {\n this.stop();\n } else {\n this.start();\n }\n }\n };\n setScroll(scroll) {\n if (this.isHorizontal) {\n this.options.wrapper.scrollTo({ left: scroll, behavior: \"instant\" });\n } else {\n this.options.wrapper.scrollTo({ top: scroll, behavior: \"instant\" });\n }\n }\n onClick = (event) => {\n const path = event.composedPath();\n const anchor = path.find(\n (node) => node instanceof HTMLAnchorElement && (node.getAttribute(\"href\")?.startsWith(\"#\") || node.getAttribute(\"href\")?.startsWith(\"/#\") || node.getAttribute(\"href\")?.startsWith(\"./#\"))\n );\n if (anchor) {\n const id = anchor.getAttribute(\"href\");\n if (id) {\n const options = typeof this.options.anchors === \"object\" && this.options.anchors ? this.options.anchors : void 0;\n let target = `#${id.split(\"#\")[1]}`;\n if ([\"#\", \"/#\", \"./#\", \"#top\", \"/#top\", \"./#top\"].includes(id)) {\n target = 0;\n }\n this.scrollTo(target, options);\n }\n }\n };\n onPointerDown = (event) => {\n if (event.button === 1) {\n this.reset();\n }\n };\n onVirtualScroll = (data) => {\n if (typeof this.options.virtualScroll === \"function\" && this.options.virtualScroll(data) === false)\n return;\n const { deltaX, deltaY, event } = data;\n this.emitter.emit(\"virtual-scroll\", { deltaX, deltaY, event });\n if (event.ctrlKey) return;\n if (event.lenisStopPropagation) return;\n const isTouch = event.type.includes(\"touch\");\n const isWheel = event.type.includes(\"wheel\");\n this.isTouching = event.type === \"touchstart\" || event.type === \"touchmove\";\n const isClickOrTap = deltaX === 0 && deltaY === 0;\n const isTapToStop = this.options.syncTouch && isTouch && event.type === \"touchstart\" && isClickOrTap && !this.isStopped && !this.isLocked;\n if (isTapToStop) {\n this.reset();\n return;\n }\n const isUnknownGesture = this.options.gestureOrientation === \"vertical\" && deltaY === 0 || this.options.gestureOrientation === \"horizontal\" && deltaX === 0;\n if (isClickOrTap || isUnknownGesture) {\n return;\n }\n let composedPath = event.composedPath();\n composedPath = composedPath.slice(0, composedPath.indexOf(this.rootElement));\n const prevent = this.options.prevent;\n if (!!composedPath.find(\n (node) => node instanceof HTMLElement && (typeof prevent === \"function\" && prevent?.(node) || node.hasAttribute?.(\"data-lenis-prevent\") || isTouch && node.hasAttribute?.(\"data-lenis-prevent-touch\") || isWheel && node.hasAttribute?.(\"data-lenis-prevent-wheel\") || this.options.allowNestedScroll && this.checkNestedScroll(node, { deltaX, deltaY }))\n ))\n return;\n if (this.isStopped || this.isLocked) {\n event.preventDefault();\n return;\n }\n const isSmooth = this.options.syncTouch && isTouch || this.options.smoothWheel && isWheel;\n if (!isSmooth) {\n this.isScrolling = \"native\";\n this.animate.stop();\n event.lenisStopPropagation = true;\n return;\n }\n let delta = deltaY;\n if (this.options.gestureOrientation === \"both\") {\n delta = Math.abs(deltaY) > Math.abs(deltaX) ? deltaY : deltaX;\n } else if (this.options.gestureOrientation === \"horizontal\") {\n delta = deltaX;\n }\n if (!this.options.overscroll || this.options.infinite || this.options.wrapper !== window && (this.animatedScroll > 0 && this.animatedScroll < this.limit || this.animatedScroll === 0 && deltaY > 0 || this.animatedScroll === this.limit && deltaY < 0)) {\n event.lenisStopPropagation = true;\n }\n event.preventDefault();\n const isSyncTouch = isTouch && this.options.syncTouch;\n const isTouchEnd = isTouch && event.type === \"touchend\";\n const hasTouchInertia = isTouchEnd && Math.abs(delta) > 5;\n if (hasTouchInertia) {\n delta = this.velocity * this.options.touchInertiaMultiplier;\n }\n this.scrollTo(this.targetScroll + delta, {\n programmatic: false,\n ...isSyncTouch ? {\n lerp: hasTouchInertia ? this.options.syncTouchLerp : 1\n // immediate: !hasTouchInertia,\n } : {\n lerp: this.options.lerp,\n duration: this.options.duration,\n easing: this.options.easing\n }\n });\n };\n /**\n * Force lenis to recalculate the dimensions\n */\n resize() {\n this.dimensions.resize();\n this.animatedScroll = this.targetScroll = this.actualScroll;\n this.emit();\n }\n emit() {\n this.emitter.emit(\"scroll\", this);\n }\n onNativeScroll = () => {\n if (this._resetVelocityTimeout !== null) {\n clearTimeout(this._resetVelocityTimeout);\n this._resetVelocityTimeout = null;\n }\n if (this._preventNextNativeScrollEvent) {\n this._preventNextNativeScrollEvent = false;\n return;\n }\n if (this.isScrolling === false || this.isScrolling === \"native\") {\n const lastScroll = this.animatedScroll;\n this.animatedScroll = this.targetScroll = this.actualScroll;\n this.lastVelocity = this.velocity;\n this.velocity = this.animatedScroll - lastScroll;\n this.direction = Math.sign(\n this.animatedScroll - lastScroll\n );\n if (!this.isStopped) {\n this.isScrolling = \"native\";\n }\n this.emit();\n if (this.velocity !== 0) {\n this._resetVelocityTimeout = setTimeout(() => {\n this.lastVelocity = this.velocity;\n this.velocity = 0;\n this.isScrolling = false;\n this.emit();\n }, 400);\n }\n }\n };\n reset() {\n this.isLocked = false;\n this.isScrolling = false;\n this.animatedScroll = this.targetScroll = this.actualScroll;\n this.lastVelocity = this.velocity = 0;\n this.animate.stop();\n }\n /**\n * Start lenis scroll after it has been stopped\n */\n start() {\n if (!this.isStopped) return;\n this.reset();\n this.isStopped = false;\n }\n /**\n * Stop lenis scroll\n */\n stop() {\n if (this.isStopped) return;\n this.reset();\n this.isStopped = true;\n }\n /**\n * RequestAnimationFrame for lenis\n *\n * @param time The time in ms from an external clock like `requestAnimationFrame` or Tempus\n */\n raf = (time) => {\n const deltaTime = time - (this.time || time);\n this.time = time;\n this.animate.advance(deltaTime * 1e-3);\n if (this.options.autoRaf) {\n this.__rafID = requestAnimationFrame(this.raf);\n }\n };\n /**\n * Scroll to a target value\n *\n * @param target The target value to scroll to\n * @param options The options for the scroll\n *\n * @example\n * lenis.scrollTo(100, {\n * offset: 100,\n * duration: 1,\n * easing: (t) => 1 - Math.cos((t * Math.PI) / 2),\n * lerp: 0.1,\n * onStart: () => {\n * console.log('onStart')\n * },\n * onComplete: () => {\n * console.log('onComplete')\n * },\n * })\n */\n scrollTo(target, {\n offset = 0,\n immediate = false,\n lock = false,\n duration = this.options.duration,\n easing = this.options.easing,\n lerp: lerp2 = this.options.lerp,\n onStart,\n onComplete,\n force = false,\n // scroll even if stopped\n programmatic = true,\n // called from outside of the class\n userData\n } = {}) {\n if ((this.isStopped || this.isLocked) && !force) return;\n if (typeof target === \"string\" && [\"top\", \"left\", \"start\"].includes(target)) {\n target = 0;\n } else if (typeof target === \"string\" && [\"bottom\", \"right\", \"end\"].includes(target)) {\n target = this.limit;\n } else {\n let node;\n if (typeof target === \"string\") {\n node = document.querySelector(target);\n } else if (target instanceof HTMLElement && target?.nodeType) {\n node = target;\n }\n if (node) {\n if (this.options.wrapper !== window) {\n const wrapperRect = this.rootElement.getBoundingClientRect();\n offset -= this.isHorizontal ? wrapperRect.left : wrapperRect.top;\n }\n const rect = node.getBoundingClientRect();\n target = (this.isHorizontal ? rect.left : rect.top) + this.animatedScroll;\n }\n }\n if (typeof target !== \"number\") return;\n target += offset;\n target = Math.round(target);\n if (this.options.infinite) {\n if (programmatic) {\n this.targetScroll = this.animatedScroll = this.scroll;\n const distance = target - this.animatedScroll;\n if (distance > this.limit / 2) {\n target = target - this.limit;\n } else if (distance < -this.limit / 2) {\n target = target + this.limit;\n }\n }\n } else {\n target = clamp(0, target, this.limit);\n }\n if (target === this.targetScroll) {\n onStart?.(this);\n onComplete?.(this);\n return;\n }\n this.userData = userData ?? {};\n if (immediate) {\n this.animatedScroll = this.targetScroll = target;\n this.setScroll(this.scroll);\n this.reset();\n this.preventNextNativeScrollEvent();\n this.emit();\n onComplete?.(this);\n this.userData = {};\n requestAnimationFrame(() => {\n this.dispatchScrollendEvent();\n });\n return;\n }\n if (!programmatic) {\n this.targetScroll = target;\n }\n this.animate.fromTo(this.animatedScroll, target, {\n duration,\n easing,\n lerp: lerp2,\n onStart: () => {\n if (lock) this.isLocked = true;\n this.isScrolling = \"smooth\";\n onStart?.(this);\n },\n onUpdate: (value, completed) => {\n this.isScrolling = \"smooth\";\n this.lastVelocity = this.velocity;\n this.velocity = value - this.animatedScroll;\n this.direction = Math.sign(this.velocity);\n this.animatedScroll = value;\n this.setScroll(this.scroll);\n if (programmatic) {\n this.targetScroll = value;\n }\n if (!completed) this.emit();\n if (completed) {\n this.reset();\n this.emit();\n onComplete?.(this);\n this.userData = {};\n requestAnimationFrame(() => {\n this.dispatchScrollendEvent();\n });\n this.preventNextNativeScrollEvent();\n }\n }\n });\n }\n preventNextNativeScrollEvent() {\n this._preventNextNativeScrollEvent = true;\n requestAnimationFrame(() => {\n this._preventNextNativeScrollEvent = false;\n });\n }\n checkNestedScroll(node, { deltaX, deltaY }) {\n const time = Date.now();\n const cache = node._lenis ??= {};\n let hasOverflowX, hasOverflowY, isScrollableX, isScrollableY, scrollWidth, scrollHeight, clientWidth, clientHeight;\n const gestureOrientation = this.options.gestureOrientation;\n if (time - (cache.time ?? 0) > 2e3) {\n cache.time = Date.now();\n const computedStyle = window.getComputedStyle(node);\n cache.computedStyle = computedStyle;\n const overflowXString = computedStyle.overflowX;\n const overflowYString = computedStyle.overflowY;\n hasOverflowX = [\"auto\", \"overlay\", \"scroll\"].includes(overflowXString);\n hasOverflowY = [\"auto\", \"overlay\", \"scroll\"].includes(overflowYString);\n cache.hasOverflowX = hasOverflowX;\n cache.hasOverflowY = hasOverflowY;\n if (!hasOverflowX && !hasOverflowY) return false;\n if (gestureOrientation === \"vertical\" && !hasOverflowY) return false;\n if (gestureOrientation === \"horizontal\" && !hasOverflowX) return false;\n scrollWidth = node.scrollWidth;\n scrollHeight = node.scrollHeight;\n clientWidth = node.clientWidth;\n clientHeight = node.clientHeight;\n isScrollableX = scrollWidth > clientWidth;\n isScrollableY = scrollHeight > clientHeight;\n cache.isScrollableX = isScrollableX;\n cache.isScrollableY = isScrollableY;\n cache.scrollWidth = scrollWidth;\n cache.scrollHeight = scrollHeight;\n cache.clientWidth = clientWidth;\n cache.clientHeight = clientHeight;\n } else {\n isScrollableX = cache.isScrollableX;\n isScrollableY = cache.isScrollableY;\n hasOverflowX = cache.hasOverflowX;\n hasOverflowY = cache.hasOverflowY;\n scrollWidth = cache.scrollWidth;\n scrollHeight = cache.scrollHeight;\n clientWidth = cache.clientWidth;\n clientHeight = cache.clientHeight;\n }\n if (!hasOverflowX && !hasOverflowY || !isScrollableX && !isScrollableY) {\n return false;\n }\n if (gestureOrientation === \"vertical\" && (!hasOverflowY || !isScrollableY))\n return false;\n if (gestureOrientation === \"horizontal\" && (!hasOverflowX || !isScrollableX))\n return false;\n let orientation;\n if (gestureOrientation === \"horizontal\") {\n orientation = \"x\";\n } else if (gestureOrientation === \"vertical\") {\n orientation = \"y\";\n } else {\n const isScrollingX = deltaX !== 0;\n const isScrollingY = deltaY !== 0;\n if (isScrollingX && hasOverflowX && isScrollableX) {\n orientation = \"x\";\n }\n if (isScrollingY && hasOverflowY && isScrollableY) {\n orientation = \"y\";\n }\n }\n if (!orientation) return false;\n let scroll, maxScroll, delta, hasOverflow, isScrollable;\n if (orientation === \"x\") {\n scroll = node.scrollLeft;\n maxScroll = scrollWidth - clientWidth;\n delta = deltaX;\n hasOverflow = hasOverflowX;\n isScrollable = isScrollableX;\n } else if (orientation === \"y\") {\n scroll = node.scrollTop;\n maxScroll = scrollHeight - clientHeight;\n delta = deltaY;\n hasOverflow = hasOverflowY;\n isScrollable = isScrollableY;\n } else {\n return false;\n }\n const willScroll = delta > 0 ? scroll < maxScroll : scroll > 0;\n return willScroll && hasOverflow && isScrollable;\n }\n /**\n * The root element on which lenis is instanced\n */\n get rootElement() {\n return this.options.wrapper === window ? document.documentElement : this.options.wrapper;\n }\n /**\n * The limit which is the maximum scroll value\n */\n get limit() {\n if (this.options.__experimental__naiveDimensions) {\n if (this.isHorizontal) {\n return this.rootElement.scrollWidth - this.rootElement.clientWidth;\n } else {\n return this.rootElement.scrollHeight - this.rootElement.clientHeight;\n }\n } else {\n return this.dimensions.limit[this.isHorizontal ? \"x\" : \"y\"];\n }\n }\n /**\n * Whether or not the scroll is horizontal\n */\n get isHorizontal() {\n return this.options.orientation === \"horizontal\";\n }\n /**\n * The actual scroll value\n */\n get actualScroll() {\n const wrapper = this.options.wrapper;\n return this.isHorizontal ? wrapper.scrollX ?? wrapper.scrollLeft : wrapper.scrollY ?? wrapper.scrollTop;\n }\n /**\n * The current scroll value\n */\n get scroll() {\n return this.options.infinite ? modulo(this.animatedScroll, this.limit) : this.animatedScroll;\n }\n /**\n * The progress of the scroll relative to the limit\n */\n get progress() {\n return this.limit === 0 ? 1 : this.scroll / this.limit;\n }\n /**\n * Current scroll state\n */\n get isScrolling() {\n return this._isScrolling;\n }\n set isScrolling(value) {\n if (this._isScrolling !== value) {\n this._isScrolling = value;\n this.updateClassName();\n }\n }\n /**\n * Check if lenis is stopped\n */\n get isStopped() {\n return this._isStopped;\n }\n set isStopped(value) {\n if (this._isStopped !== value) {\n this._isStopped = value;\n this.updateClassName();\n }\n }\n /**\n * Check if lenis is locked\n */\n get isLocked() {\n return this._isLocked;\n }\n set isLocked(value) {\n if (this._isLocked !== value) {\n this._isLocked = value;\n this.updateClassName();\n }\n }\n /**\n * Check if lenis is smooth scrolling\n */\n get isSmooth() {\n return this.isScrolling === \"smooth\";\n }\n /**\n * The class name applied to the wrapper element\n */\n get className() {\n let className = \"lenis\";\n if (this.options.autoToggle) className += \" lenis-autoToggle\";\n if (this.isStopped) className += \" lenis-stopped\";\n if (this.isLocked) className += \" lenis-locked\";\n if (this.isScrolling) className += \" lenis-scrolling\";\n if (this.isScrolling === \"smooth\") className += \" lenis-smooth\";\n return className;\n }\n updateClassName() {\n this.cleanUpClassName();\n this.rootElement.className = `${this.rootElement.className} ${this.className}`.trim();\n }\n cleanUpClassName() {\n this.rootElement.className = this.rootElement.className.replace(/lenis(-\\w+)?/g, \"\").trim();\n }\n};\nexport {\n Lenis as default\n};\n//# sourceMappingURL=lenis.mjs.map","import Lenis from 'lenis'\r\nclass FeatherScroll {\r\n // Stores all instances of FeatherScroll\r\n static instances = [];\r\n constructor(options = {}) {\r\n this.wrapper = options.wrapper || document.documentElement;\r\n this.content = options.content || document.body;\r\n // Initialize Lenis with custom options or defaults\r\n this.lenis = new Lenis({\r\n wrapper: this.wrapper,\r\n content: this.content,\r\n smooth: options.smooth ?? true,\r\n duration: options.duration ?? 1.2,\r\n easing: options.easing ?? ((t) => 1 - Math.pow(1 - t, 3)),\r\n direction: options.direction ?? 'vertical',\r\n gestureDirection: options.gestureDirection ?? 'both',\r\n wheelMultiplier: options.mouseSenstivity ?? 1,\r\n touchMultiplier: options.touchSenstivity ?? 2,\r\n infinite: options.infinite ?? false\r\n });\r\n // Scroll direction tracking\r\n this.scrollDirection = 'down';\r\n this.lastScroll = 0;\r\n // Elements with sticky and parallax behavior\r\n this.stickyElements = [...this.content.querySelectorAll('[data-scroll-sticky]')];\r\n this.parallaxElements = [...this.content.querySelectorAll('[data-scroll-speed]')];\r\n // Store initial positions for parallax elements\r\n this.parallaxElements.forEach((el) => {\r\n const rect = el.getBoundingClientRect();\r\n el.dataset.initialTop = rect.top + window.scrollY;\r\n el.dataset.initialLeft = rect.left + window.scrollX;\r\n });\r\n // Initialize features\r\n this.initStickyElements();\r\n this.trackScrollDirection();\r\n this.startRAF(); // Start animation loop\r\n FeatherScroll.instances.push(this); // Register instance\r\n if (window.ScrollTrigger) {\r\n this.setupScrollTrigger();\r\n }\r\n // Observe body overflow for automatic disabling\r\n this.observeBodyOverflow();\r\n }\r\n // RAF loop for Lenis + sticky + parallax\r\n startRAF() {\r\n const raf = (time) => {\r\n this.lenis.raf(time);\r\n this.updateStickyElements();\r\n this.updateParallax();\r\n requestAnimationFrame(raf);\r\n };\r\n requestAnimationFrame(raf);\r\n }\r\n // Detect scroll direction: 'up' or 'down'\r\n trackScrollDirection() {\r\n this.lenis.on('scroll', ({ scroll }) => {\r\n const newDirection = scroll > this.lastScroll ? 'down' : 'up';\r\n if (newDirection !== this.scrollDirection) {\r\n this.scrollDirection = newDirection;\r\n }\r\n this.lastScroll = scroll;\r\n });\r\n }\r\n // Observe overflow-y on body, pause/resume Lenis\r\n observeBodyOverflow() {\r\n const observer = new MutationObserver(() => {\r\n const overflowY = window.getComputedStyle(document.body).overflowY;\r\n if (overflowY === 'hidden') {\r\n this.lenis.stop();\r\n } else {\r\n this.lenis.start();\r\n }\r\n });\r\n observer.observe(document.body, {\r\n attributes: true,\r\n attributeFilter: ['style']\r\n });\r\n // Initial check\r\n const initialOverflowY = window.getComputedStyle(document.body).overflowY;\r\n if (initialOverflowY === 'hidden') {\r\n this.lenis.stop();\r\n }\r\n }\r\n // Return current scroll direction\r\n getScrollDirection() {\r\n return this.scrollDirection || 'down';\r\n }\r\n // Set initial positions for sticky elements\r\n initStickyElements() {\r\n this.stickyElements.forEach((el) => {\r\n const parent = el.parentElement;\r\n const rect = el.getBoundingClientRect();\r\n el.dataset.stickyStart = parent.offsetTop;\r\n el.dataset.stickyEnd = parent.offsetTop + parent.offsetHeight;\r\n el.dataset.originalWidth = `${rect.width}px`;\r\n el.dataset.originalHeight = `${rect.height}px`;\r\n });\r\n }\r\n // Update sticky element positions\r\n updateStickyElements() {\r\n const scrollY = this.lenis.scroll;\r\n const viewportHeight = window.innerHeight;\r\n this.stickyElements.forEach((el) => {\r\n const parent = el.parentElement;\r\n const nextSibling = parent.nextElementSibling;\r\n if (!nextSibling) return;\r\n const stickyStart = parseFloat(el.dataset.stickyStart);\r\n const stickyEnd = parseFloat(el.dataset.stickyEnd);\r\n const parentRect = parent.getBoundingClientRect();\r\n const nextRect = nextSibling.getBoundingClientRect();\r\n // If next section enters halfway viewport, stop sticking\r\n const isNextEntering = nextRect.top < viewportHeight * 0.5;\r\n if (scrollY >= stickyStart && 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-------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "dependencies": { 3 | "@rollup/plugin-commonjs": "^28.0.3", 4 | "@rollup/plugin-node-resolve": "^16.0.1", 5 | "@rollup/plugin-terser": "^0.4.4", 6 | "lenis": "^1.3.1", 7 | "rollup": "^4.40.1" 8 | }, 9 | "name": "scrollfeather", 10 | "version": "1.2.9", 11 | "description": "A lightweight and smooth scrolling library. Works for both full-page and container-based scrolling also supports all devices.", 12 | "main": "dist/featherScroll.min.js", 13 | "module": "dist/featherScroll.esm.js", 14 | "unpkg": "dist/featherScroll.min.js", 15 | "scripts": { 16 | "test": "echo \"Error: no test specified\" && exit 1", 17 | "build": "rollup -c" 18 | }, 19 | "repository": { 20 | "type": "git", 21 | "url": "git+https://github.com/ranvijay-raj/Feather-scroll-js.git" 22 | }, 23 | "keywords": [ 24 | "smooth-scroll", 25 | "lenis", 26 | "scroll-library", 27 | "animation", 28 | "featherscroll", 29 | "scrollfeather" 30 | ], 31 | "author": "Ranvijay raj", 32 | "license": "MIT", 33 | "bugs": { 34 | "url": "https://github.com/ranvijay-raj/Feather-scroll-js/issues" 35 | }, 36 | "homepage": "https://github.com/ranvijay-raj/Feather-scroll-js#readme" 37 | } 38 | -------------------------------------------------------------------------------- /src/featherScroll.js: -------------------------------------------------------------------------------- 1 | import Lenis from 'lenis' 2 | class FeatherScroll { 3 | // Stores all instances of FeatherScroll 4 | static instances = []; 5 | constructor(options = {}) { 6 | this.wrapper = options.wrapper || document.documentElement; 7 | this.content = options.content || document.body; 8 | // Initialize Lenis with custom options or defaults 9 | this.lenis = new Lenis({ 10 | wrapper: this.wrapper, 11 | content: this.content, 12 | smooth: options.smooth ?? true, 13 | duration: options.duration ?? 1.2, 14 | easing: options.easing ?? ((t) => 1 - Math.pow(1 - t, 3)), 15 | direction: options.direction ?? 'vertical', 16 | gestureDirection: options.gestureDirection ?? 'both', 17 | wheelMultiplier: options.mouseSenstivity ?? 1, 18 | touchMultiplier: options.touchSenstivity ?? 2, 19 | infinite: options.infinite ?? false 20 | }); 21 | // Scroll direction tracking 22 | this.scrollDirection = 'down'; 23 | this.lastScroll = 0; 24 | // Elements with sticky and parallax behavior 25 | this.stickyElements = [...this.content.querySelectorAll('[data-scroll-sticky]')]; 26 | this.parallaxElements = [...this.content.querySelectorAll('[data-scroll-speed]')]; 27 | // Store initial positions for parallax elements 28 | this.parallaxElements.forEach((el) => { 29 | const rect = el.getBoundingClientRect(); 30 | el.dataset.initialTop = rect.top + window.scrollY; 31 | el.dataset.initialLeft = rect.left + window.scrollX; 32 | }); 33 | // Initialize features 34 | this.initStickyElements(); 35 | this.trackScrollDirection(); 36 | this.startRAF(); // Start animation loop 37 | FeatherScroll.instances.push(this); // Register instance 38 | if (window.ScrollTrigger) { 39 | this.setupScrollTrigger(); 40 | } 41 | // Observe body overflow for automatic disabling 42 | this.observeBodyOverflow(); 43 | } 44 | // RAF loop for Lenis + sticky + parallax 45 | startRAF() { 46 | const raf = (time) => { 47 | this.lenis.raf(time); 48 | this.updateStickyElements(); 49 | this.updateParallax(); 50 | requestAnimationFrame(raf); 51 | }; 52 | requestAnimationFrame(raf); 53 | } 54 | // Detect scroll direction: 'up' or 'down' 55 | trackScrollDirection() { 56 | this.lenis.on('scroll', ({ scroll }) => { 57 | const newDirection = scroll > this.lastScroll ? 'down' : 'up'; 58 | if (newDirection !== this.scrollDirection) { 59 | this.scrollDirection = newDirection; 60 | } 61 | this.lastScroll = scroll; 62 | }); 63 | } 64 | // Observe overflow-y on body, pause/resume Lenis 65 | observeBodyOverflow() { 66 | const observer = new MutationObserver(() => { 67 | const overflowY = window.getComputedStyle(document.body).overflowY; 68 | if (overflowY === 'hidden') { 69 | this.lenis.stop(); 70 | } else { 71 | this.lenis.start(); 72 | } 73 | }); 74 | observer.observe(document.body, { 75 | attributes: true, 76 | attributeFilter: ['style'] 77 | }); 78 | // Initial check 79 | const initialOverflowY = window.getComputedStyle(document.body).overflowY; 80 | if (initialOverflowY === 'hidden') { 81 | this.lenis.stop(); 82 | } 83 | } 84 | // Return current scroll direction 85 | getScrollDirection() { 86 | return this.scrollDirection || 'down'; 87 | } 88 | // Set initial positions for sticky elements 89 | initStickyElements() { 90 | this.stickyElements.forEach((el) => { 91 | const parent = el.parentElement; 92 | const rect = el.getBoundingClientRect(); 93 | el.dataset.stickyStart = parent.offsetTop; 94 | el.dataset.stickyEnd = parent.offsetTop + parent.offsetHeight; 95 | el.dataset.originalWidth = `${rect.width}px`; 96 | el.dataset.originalHeight = `${rect.height}px`; 97 | }); 98 | } 99 | // Update sticky element positions 100 | updateStickyElements() { 101 | const scrollY = this.lenis.scroll; 102 | const viewportHeight = window.innerHeight; 103 | this.stickyElements.forEach((el) => { 104 | const parent = el.parentElement; 105 | const nextSibling = parent.nextElementSibling; 106 | if (!nextSibling) return; 107 | const stickyStart = parseFloat(el.dataset.stickyStart); 108 | const stickyEnd = parseFloat(el.dataset.stickyEnd); 109 | const parentRect = parent.getBoundingClientRect(); 110 | const nextRect = nextSibling.getBoundingClientRect(); 111 | // If next section enters halfway viewport, stop sticking 112 | const isNextEntering = nextRect.top < viewportHeight * 0.5; 113 | if (scrollY >= stickyStart && scrollY < stickyEnd && !isNextEntering) { 114 | el.style.position = 'fixed'; 115 | el.style.top = `${window.innerHeight / 2 - el.offsetHeight / 2}px`; 116 | el.style.left = `${parentRect.left + parentRect.width / 2 - el.offsetWidth / 2}px`; 117 | el.style.opacity = '1'; 118 | } else { 119 | el.style.position = 'relative'; 120 | el.style.opacity = '0'; 121 | } 122 | }); 123 | } 124 | // Apply parallax effect based on data attributes 125 | updateParallax() { 126 | const scrollY = this.lenis.scroll; 127 | this.parallaxElements.forEach((el) => { 128 | const speed = parseFloat(el.getAttribute("data-scroll-speed")) || 1; 129 | const direction = el.getAttribute("data-scroll-direction") || "vertical"; 130 | const initialTop = parseFloat(el.dataset.initialTop); 131 | const initialLeft = parseFloat(el.dataset.initialLeft); 132 | let offsetX = 0, offsetY = 0; 133 | if (direction === "horizontal") { 134 | offsetX = (scrollY - initialTop) * speed * 0.1; 135 | } else if (direction === "vertical") { 136 | offsetY = (scrollY - initialTop) * speed * 0.1; 137 | } else if (direction === "both") { 138 | offsetX = (scrollY - initialTop) * speed * 0.1; 139 | offsetY = (scrollY - initialTop) * speed * 0.1; 140 | } 141 | // If GSAP is present, respect GSAP transforms 142 | let gsapX = 0, gsapY = 0; 143 | if (window.gsap) { 144 | gsapX = gsap.getProperty(el, "x") || 0; 145 | gsapY = gsap.getProperty(el, "y") || 0; 146 | } 147 | el.style.transform = `translate3d(${offsetX + gsapX}px, ${offsetY + gsapY}px, 0)`; 148 | }); 149 | } 150 | // Integration with GSAP ScrollTrigger 151 | setupScrollTrigger() { 152 | this.lenis.on('scroll', () => { 153 | ScrollTrigger.update(); 154 | }); 155 | } 156 | // Public method: Scroll to a target 157 | scrollTo(target, options = {}) { 158 | this.lenis.scrollTo(target, options); 159 | } 160 | // Public method: Start scrolling 161 | start() { 162 | this.lenis.start(); 163 | } 164 | // Public method: Stop scrolling 165 | stop() { 166 | this.lenis.stop(); 167 | } 168 | // Public method: Destroy the instance 169 | destroy() { 170 | this.lenis.destroy(); 171 | FeatherScroll.instances = FeatherScroll.instances.filter((instance) => instance !== this); 172 | } 173 | // Public method: Get scroll position 174 | getScrollPosition() { 175 | return this.lenis.scroll; 176 | } 177 | // Update Lenis options dynamically 178 | updateOptions(newOptions) { 179 | Object.assign(this.lenis.options, newOptions); 180 | } 181 | } 182 | export default FeatherScroll; 183 | 184 | // Also attach to window for CDN users 185 | if (typeof window !== 'undefined') { 186 | window.FeatherScroll = FeatherScroll; 187 | } --------------------------------------------------------------------------------