├── .gitignore ├── CHANGELOG.md ├── CONTRIBUTING.md ├── LICENSE ├── README.md ├── dist ├── lifecycle.es5.js ├── lifecycle.es5.js.map ├── lifecycle.mjs ├── lifecycle.mjs.map ├── lifecycle.native.mjs └── lifecycle.native.mjs.map ├── package-lock.json ├── package.json ├── rollup.config.js ├── src ├── Lifecycle.mjs ├── StateChangeEvent.mjs ├── export.mjs ├── natives │ ├── Event.mjs │ └── EventTarget.mjs └── shims │ ├── Event.mjs │ ├── EventTarget.mjs │ └── support.mjs └── test ├── Lifecycle-test.mjs ├── export-test.mjs └── index.html /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | npm-debug.log 3 | .DS_Store 4 | 5 | test/test-bundle.js 6 | test/test-bundle.js.map 7 | 8 | demo 9 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Changelog 2 | 3 | ### 0.1.2 (2019-08-27) 4 | 5 | - Fix security issues in dependencies via npm audit 6 | 7 | ### 0.1.1 (2018-08-03) 8 | 9 | - Fix a bug due to Safari not dispatching the pagehide or visibilitychange events (#3) 10 | - Simplify the logic for `getCurrentState()` (#1) 11 | 12 | ### 0.1.0 (2018-06-27) 13 | 14 | - Initial public release 15 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # How to Contribute 2 | 3 | We'd love to accept your patches and contributions to this project. 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The text should be enclosed in the appropriate 185 | comment syntax for the file format. We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright 2018 Google, Inc. 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # PageLifecycle.js 2 | 3 | - [Overview](#overview) 4 | - [Installation](#installation) 5 | - [Usage](#usage) 6 | - [API](#api) 7 | - [Properties](#properties) 8 | - [Methods](#methods) 9 | - [Events](#events) 10 | - [Browser Support](#browser-support) 11 | 12 | 13 | ## Overview 14 | 15 | PageLifecycle.js is a tiny JavaScript library (<1K gzipped) that allows developers to easily observe [Page Lifecycle API](https://developers.google.com/web/updates/2018/07/page-lifecycle-api) state changes and implement [Page Lifecycle best practices](https://developers.google.com/web/updates/2018/07/page-lifecycle-api#developer-recommendations-for-each-state) consistently across all browsers. 16 | 17 | **▶️ View demo: [page-lifecycle.glitch.me](https://page-lifecycle.glitch.me/) 👀** 18 | 19 | ## Installation 20 | 21 | You can install this library from npm by running: 22 | 23 | ```sh 24 | npm install --save-dev page-lifecycle 25 | ``` 26 | 27 | ## Usage 28 | 29 | Releases of this library include three minified, production-ready versions: 30 | 31 | **1. ES5: [`dist/lifecycle.es5.js`](/dist/lifecycle.es5.js)** (UMD) ⭐ 32 | 33 | Use this version for maximum compatibility with legacy browsers (that can't run ES2015+ code). 34 | 35 | As a UMD bundle, it can be required in CommonJS or AMD environments, or it can be loaded with a script tag as the browser global `lifecycle`. 36 | 37 | ```html 38 | 39 | 44 | ``` 45 | 46 | **2. ES2015: [`dist/lifecycle.mjs`](/dist/lifecycle.mjs)** (ESM) 🔥 47 | 48 | Use this version if you only support ES module-capable browsers or if you're using ` 58 | ``` 59 | 60 | 61 | **3. ES2015 (native): [`dist/lifecycle.native.mjs`](/dist/lifecycle.native.mjs)** (ESM w/o `EventTarget` and `Event` shims) ⚠️ 62 | 63 | Use this version if you're only targeting browsers that [support extending `EventTarget` and `Event` constructors](https://www.chromestatus.com/features/5721972856061952). 64 | 65 | *Note: this version is the smallest but will only work in some browsers. The implementation instructions are the same as the ES2015 version above.* 66 | 67 | ## API 68 | 69 | The PageLifecycle.js library exports a `lifecycle` object, which is a singleton instance of the [`Lifecycle`](/src/Lifecycle.mjs) class. The `Lifecycle` class has the following properties, methods, and events: 70 | 71 | ### Properties 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 85 | 86 | 87 | 88 | 89 | 92 | 93 |
NameTypeDescription
statestring 83 | Returns the current Page Lifecycle state. 84 |
pageWasDiscardedboolean 90 | Returns the value of document.wasDiscarded (or false if not present). 91 |
94 | 95 | ### Methods 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 112 | 113 | 114 | 115 | 123 | 124 | 125 | 126 | 135 | 136 | 137 | 138 | 145 | 146 |
NameDescription
addEventListener 105 |

Parameters:

106 |
    107 |
  • type: string
    • 108 |
  • listener: function(Event)
    • 109 |
110 |

Adds a callback function to be invoked whenever the passed event type is detected. (Note: at the moment only the "statechange" event type is supported.)

111 |
removeEventListener 116 |

Parameters:

117 |
    118 |
  • type: string
    • 119 |
  • listener: function(Event)
    • 120 |
121 |

Removes a function from the current list of listeners for the passed event type. (Note: at the moment only the "statechange" event type is supported.)

122 |
addUnsavedChanges 127 |

Parameters:

128 |
    129 |
  • id: Object|Symbol
    • 130 |
131 |

Adds an item to an internal pending-changes stack. Calling this method adds a generic beforeunload listener to the window (if one isn't already added).

132 |

The argument passed should be unique to this state, as it can only be removed by passing the same argument to removeUnsavedChanges(). 133 |

134 |
removeUnsavedChanges 139 |

Parameters:

140 |
    141 |
  • id: Object|Symbol
    • 142 |
143 |

Removes an item matching the passed argument from an internal pending-changes stack. If the stack is empty, the generic beforeunload listener is removed from the window.

144 |
147 | 148 | ### Events 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 166 | 167 |
NameDescription
statechange 158 |

Properties:

159 |
    160 |
  • newState: string The current lifecycle state the page just transitioned to.
    • 161 |
  • oldState: string The previous lifecycle state the page just transitioned from.
    • 162 |
  • originalEvent: Event the DOM event that triggered the state change.
    • 163 |
164 |

The statechange event is fired whenever the page's lifecycle state changes.

165 |
168 | 169 | 170 | ## Browser Support 171 | 172 | 173 | 174 | 178 | 182 | 186 | 190 | 194 | 198 | 199 |
175 | Chrome
176 | ✔ 177 | 		179 | Firefox
180 | ✔ 181 | 		183 | Safari
184 | ✔ 185 | 		187 | Edge
188 | ✔ 189 | 		191 | Internet Explorer
192 | 9+ 193 | 		195 | Opera
196 | ✔ 197 |
200 | 201 | PageLifecycle.js has been tested and known to work in the above browsers. 202 | -------------------------------------------------------------------------------- /dist/lifecycle.es5.js: -------------------------------------------------------------------------------- 1 | /*! 2 | Copyright 2018 Google Inc. All Rights Reserved. 3 | Licensed under the Apache License, Version 2.0 (the "License"); 4 | you may not use this file except in compliance with the License. 5 | You may obtain a copy of the License at 6 | 7 | http://www.apache.org/licenses/LICENSE-2.0 8 | 9 | Unless required by applicable law or agreed to in writing, software 10 | distributed under the License is distributed on an "AS IS" BASIS, 11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | See the License for the specific language governing permissions and 13 | limitations under the License. 14 | */ 15 | /*! lifecycle.es5.js v0.1.1 */ 16 | !function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.lifecycle=t()}(this,function(){"use strict";var e=void 0;try{new EventTarget,e=!1}catch(t){e=!1}var t="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},n=function(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")},i=function(){function e(e,t){for(var n=0;n-1&&n.splice(i,1)}},{key:"dispatchEvent",value:function(e){return e.target=this,Object.freeze(e),this._getRegistry(e.type).forEach(function(t){return t(e)}),!0}},{key:"_getRegistry",value:function(e){return this._registry[e]=this._registry[e]||[]}}]),e}(),o=e?EventTarget:s,u=e?Event:function e(t){n(this,e),this.type=t},f=function(e){function t(e,i){n(this,t);var r=a(this,(t.__proto__||Object.getPrototypeOf(t)).call(this,e));return r.newState=i.newState,r.oldState=i.oldState,r.originalEvent=i.originalEvent,r}return r(t,u),t}(),c="active",h="passive",d="hidden",l="frozen",p="terminated",v="object"===("undefined"==typeof safari?"undefined":t(safari))&&safari.pushNotification,y=["focus","blur","visibilitychange","freeze","resume","pageshow","onpageshow"in self?"pagehide":"unload"],g=function(e){return e.preventDefault(),e.returnValue="Are you sure?"},_=[[c,h,d,p],[c,h,d,l],[d,h,c],[l,d],[l,c],[l,h]].map(function(e){return e.reduce(function(e,t,n){return e[t]=n,e},{})}),b=function(){return document.visibilityState===d?d:document.hasFocus()?c:h};return new(function(e){function t(){n(this,t);var e=a(this,(t.__proto__||Object.getPrototypeOf(t)).call(this)),i=b();return e._state=i,e._unsavedChanges=[],e._handleEvents=e._handleEvents.bind(e),y.forEach(function(t){return addEventListener(t,e._handleEvents,!0)}),v&&addEventListener("beforeunload",function(t){e._safariBeforeUnloadTimeout=setTimeout(function(){t.defaultPrevented||t.returnValue.length>0||e._dispatchChangesIfNeeded(t,d)},0)}),e}return r(t,o),i(t,[{key:"addUnsavedChanges",value:function(e){!this._unsavedChanges.indexOf(e)>-1&&(0===this._unsavedChanges.length&&addEventListener("beforeunload",g),this._unsavedChanges.push(e))}},{key:"removeUnsavedChanges",value:function(e){var t=this._unsavedChanges.indexOf(e);t>-1&&(this._unsavedChanges.splice(t,1),0===this._unsavedChanges.length&&removeEventListener("beforeunload",g))}},{key:"_dispatchChangesIfNeeded",value:function(e,t){if(t!==this._state)for(var n=function(e,t){for(var n,i=0;n=_[i];++i){var r=n[e],a=n[t];if(r>=0&&a>=0&&a>r)return Object.keys(n).slice(r,a+1)}return[]}(this._state,t),i=0;i -1) {\n typeRegistry.splice(handlerIndex, 1);\n }\n }\n\n /**\n * @param {!Event|!EventShim} evt\n * @return {boolean}\n * @see https://dom.spec.whatwg.org/#dom-eventtarget-dispatchevent\n */\n dispatchEvent(evt) {\n // Set the target then freeze the event object to prevent modification.\n evt.target = this;\n Object.freeze(evt);\n\n this._getRegistry(evt.type).forEach((listener) => listener(evt));\n return true;\n }\n\n /**\n * Returns an array of handlers associated with the passed event type.\n * If no handlers have been registered, an empty array is returned.\n * @private\n * @param {string} type The event type.\n * @return {!Array} An array of handler functions.\n */\n _getRegistry(type) {\n return this._registry[type] = (this._registry[type] || []);\n }\n}\n\nexport default supportsConstructableEventTarget ? EventTarget : EventTargetShim;\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport {supportsConstructableEventTarget} from './support.mjs';\n\n/**\n * A minimal Event class shim.\n * This is used if the browser doesn't natively support constructable\n * EventTarget objects.\n */\nclass EventShim {\n /**\n * @param {string} type\n */\n constructor(type) {\n this.type = type;\n }\n}\n\nexport default supportsConstructableEventTarget ? Event : EventShim;\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport Event from './shims/Event.mjs';\n\n/**\n * implements {IStateChangeEvent}\n */\nexport default class StateChangeEvent extends Event {\n /**\n * @param {string} type\n * @param {!Object} initDict\n */\n constructor(type, initDict) {\n super(type);\n this.newState = initDict.newState;\n this.oldState = initDict.oldState;\n this.originalEvent = initDict.originalEvent;\n }\n}\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport EventTarget from './shims/EventTarget.mjs';\nimport StateChangeEvent from './StateChangeEvent.mjs';\n\nconst ACTIVE = 'active';\nconst PASSIVE = 'passive';\nconst HIDDEN = 'hidden';\nconst FROZEN = 'frozen';\n// const DISCARDED = 'discarded'; Not used but show to completeness.\nconst TERMINATED = 'terminated';\n\n// Detect Safari to work around Safari-specific bugs.\nconst IS_SAFARI = typeof safari === 'object' && safari.pushNotification;\n\nconst SUPPORTS_PAGE_TRANSITION_EVENTS = 'onpageshow' in self;\n\nconst EVENTS = [\n 'focus',\n 'blur',\n 'visibilitychange',\n 'freeze',\n 'resume',\n 'pageshow',\n // IE9-10 do not support the pagehide event, so we fall back to unload\n // Note: unload *MUST ONLY* be added conditionally, otherwise it will\n // prevent page navigation caching (a.k.a bfcache).\n SUPPORTS_PAGE_TRANSITION_EVENTS ? 'pagehide' : 'unload',\n];\n\n/**\n * @param {!Event} evt\n * @return {string}\n */\nconst onbeforeunload = (evt) => {\n evt.preventDefault();\n return evt.returnValue = 'Are you sure?';\n};\n\n/**\n * Converts an array of states into an object where the state is the key\n * and the value is the index.\n * @param {!Array} arr\n * @return {!Object}\n */\nconst toIndexedObject = (arr) => arr.reduce((acc, val, idx) => {\n acc[val] = idx;\n return acc;\n}, {});\n\n/**\n * @type {!Array}\n */\nconst LEGAL_STATE_TRANSITIONS = [\n // The normal unload process (bfcache process is addressed above).\n [ACTIVE, PASSIVE, HIDDEN, TERMINATED],\n\n // An active page transitioning to frozen,\n // or an unloading page going into the bfcache.\n [ACTIVE, PASSIVE, HIDDEN, FROZEN],\n\n // A hidden page transitioning back to active.\n [HIDDEN, PASSIVE, ACTIVE],\n\n // A frozen page being resumed\n [FROZEN, HIDDEN],\n\n // A frozen (bfcached) page navigated back to\n // Note: [FROZEN, HIDDEN] can happen here, but it's already covered above.\n [FROZEN, ACTIVE],\n [FROZEN, PASSIVE],\n].map(toIndexedObject);\n\n/**\n * Accepts a current state and a future state and returns an array of legal\n * state transition paths. This is needed to normalize behavior across browsers\n * since some browsers do not fire events in certain cases and thus skip\n * states.\n * @param {string} oldState\n * @param {string} newState\n * @return {!Array}\n */\nconst getLegalStateTransitionPath = (oldState, newState) => {\n // We're intentionally not using for...of here so when we transpile to ES5\n // we don't need to include the Symbol polyfills.\n for (let order, i = 0; order = LEGAL_STATE_TRANSITIONS[i]; ++i) {\n const oldIndex = order[oldState];\n const newIndex = order[newState];\n\n if (oldIndex >= 0 &&\n newIndex >= 0 &&\n newIndex > oldIndex) {\n // Differences greater than one should be reported\n // because it means a state was skipped.\n return Object.keys(order).slice(oldIndex, newIndex + 1);\n }\n }\n return [];\n // TODO(philipwalton): it shouldn't be possible to get here, but\n // consider some kind of warning or call to action if it happens.\n // console.warn(`Invalid state change detected: ${oldState} > ${newState}`);\n};\n\n/**\n * Returns the current state based on the document's visibility and\n * in input focus states. Note this method is only used to determine\n * active vs passive vs hidden states, as other states require listening\n * for events.\n * @return {string}\n */\nconst getCurrentState = () => {\n if (document.visibilityState === HIDDEN) {\n return HIDDEN;\n }\n if (document.hasFocus()) {\n return ACTIVE;\n }\n return PASSIVE;\n};\n\n/**\n * Class definition for the exported, singleton lifecycle instance.\n */\nexport default class Lifecycle extends EventTarget {\n /**\n * Initializes state, state history, and adds event listeners to monitor\n * state changes.\n */\n constructor() {\n super();\n\n const state = getCurrentState();\n\n this._state = state;\n this._unsavedChanges = [];\n\n // Bind the callback and add event listeners.\n this._handleEvents = this._handleEvents.bind(this);\n\n // Add capturing events on window so they run immediately.\n EVENTS.forEach((evt) => addEventListener(evt, this._handleEvents, true));\n\n // Safari does not reliably fire the `pagehide` or `visibilitychange`\n // events when closing a tab, so we have to use `beforeunload` with a\n // timeout to check whether the default action was prevented.\n // NOTE: we only add this to Safari because adding it to Firefox would\n // prevent the page from being eligible for bfcache.\n if (IS_SAFARI) {\n addEventListener('beforeunload', (evt) => {\n this._safariBeforeUnloadTimeout = setTimeout(() => {\n if (!(evt.defaultPrevented || evt.returnValue.length > 0)) {\n this._dispatchChangesIfNeeded(evt, HIDDEN);\n }\n }, 0);\n });\n }\n }\n\n /**\n * @return {string}\n */\n get state() {\n return this._state;\n }\n\n /**\n * Returns the value of document.wasDiscarded. This is arguably unnecessary\n * but I think there's value in having the entire API in one place and\n * consistent across browsers.\n * @return {boolean}\n */\n get pageWasDiscarded() {\n return document.wasDiscarded || false;\n }\n\n /**\n * @param {Symbol|Object} id A unique symbol or object identifying the\n *. pending state. This ID is required when removing the state later.\n */\n addUnsavedChanges(id) {\n // Don't add duplicate state. Note: ideall this would be a set, but for\n // better browser compatibility we're using an array.\n if (!this._unsavedChanges.indexOf(id) > -1) {\n // If this is the first state being added,\n // also add a beforeunload listener.\n if (this._unsavedChanges.length === 0) {\n addEventListener('beforeunload', onbeforeunload);\n }\n this._unsavedChanges.push(id);\n }\n }\n\n /**\n * @param {Symbol|Object} id A unique symbol or object identifying the\n *. pending state. This ID is required when removing the state later.\n */\n removeUnsavedChanges(id) {\n const idIndex = this._unsavedChanges.indexOf(id);\n\n if (idIndex > -1) {\n this._unsavedChanges.splice(idIndex, 1);\n\n // If there's no more pending state, remove the event listener.\n if (this._unsavedChanges.length === 0) {\n removeEventListener('beforeunload', onbeforeunload);\n }\n }\n }\n\n /**\n * @private\n * @param {!Event} originalEvent\n * @param {string} newState\n */\n _dispatchChangesIfNeeded(originalEvent, newState) {\n if (newState !== this._state) {\n const oldState = this._state;\n const path = getLegalStateTransitionPath(oldState, newState);\n\n for (let i = 0; i < path.length - 1; ++i) {\n const oldState = path[i];\n const newState = path[i + 1];\n\n this._state = newState;\n this.dispatchEvent(new StateChangeEvent('statechange', {\n oldState,\n newState,\n originalEvent,\n }));\n }\n }\n }\n\n /**\n * @private\n * @param {!Event} evt\n */\n _handleEvents(evt) {\n if (IS_SAFARI) {\n clearTimeout(this._safariBeforeUnloadTimeout);\n }\n\n switch (evt.type) {\n case 'pageshow':\n case 'resume':\n this._dispatchChangesIfNeeded(evt, getCurrentState());\n break;\n case 'focus':\n this._dispatchChangesIfNeeded(evt, ACTIVE);\n break;\n case 'blur':\n // The `blur` event can fire while the page is being unloaded, so we\n // only need to update the state if the current state is \"active\".\n if (this._state === ACTIVE) {\n this._dispatchChangesIfNeeded(evt, getCurrentState());\n }\n break;\n case 'pagehide':\n case 'unload':\n this._dispatchChangesIfNeeded(evt, evt.persisted ? FROZEN : TERMINATED);\n break;\n case 'visibilitychange':\n // The document's `visibilityState` will change to hidden as the page\n // is being unloaded, but in such cases the lifecycle state shouldn't\n // change.\n if (this._state !== FROZEN &&\n this._state !== TERMINATED) {\n this._dispatchChangesIfNeeded(evt, getCurrentState());\n }\n break;\n case 'freeze':\n this._dispatchChangesIfNeeded(evt, FROZEN);\n break;\n }\n }\n}\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport Lifecycle from './Lifecycle.mjs';\n\nexport default new Lifecycle();\n"],"names":["supportsConstructableEventTarget","EventTarget","err","EventTargetShim","_registry","type","listener","_getRegistry","push","typeRegistry","this","handlerIndex","indexOf","splice","evt","target","freeze","forEach","Event","StateChangeEvent","initDict","newState","oldState","originalEvent","ACTIVE","PASSIVE","HIDDEN","FROZEN","TERMINATED","IS_SAFARI","safari","pushNotification","EVENTS","self","onbeforeunload","preventDefault","returnValue","LEGAL_STATE_TRANSITIONS","map","arr","reduce","acc","val","idx","getCurrentState","document","visibilityState","hasFocus","state","_state","_unsavedChanges","_handleEvents","_this","bind","addEventListener","_safariBeforeUnloadTimeout","setTimeout","defaultPrevented","length","_dispatchChangesIfNeeded","id","idIndex","path","order","i","oldIndex","newIndex","Object","keys","slice","getLegalStateTransitionPath","dispatchEvent","persisted","wasDiscarded"],"mappings":";;;;;;;;;;;;;;;qLAeA,IAAIA,SAEJ,QACMC,eAK+B,EACnC,MAAOC,MAC4B,sgCCF/BC,yCAKGC,gEAUUC,EAAMC,QAChBC,aAAaF,GAAMG,KAAKF,+CAUXD,EAAMC,OAClBG,EAAeC,KAAKH,aAAaF,GACjCM,EAAeF,EAAaG,QAAQN,GACtCK,GAAgB,KACLE,OAAOF,EAAc,yCASxBG,YAERC,OAASL,YACNM,OAAOF,QAETP,aAAaO,EAAIT,MAAMY,QAAQ,SAACX,UAAaA,EAASQ,MACpD,uCAUIT,UACJK,KAAKN,UAAUC,GAASK,KAAKN,UAAUC,kBAInCL,EAAmCC,YAAcE,ICpDjDH,EAAmCkB,MALhD,WAAYb,kBACLA,KAAOA,GCPKc,yBAKPd,EAAMe,4EACVf,aACDgB,SAAWD,EAASC,WACpBC,SAAWF,EAASE,WACpBC,cAAgBH,EAASG,2BATYL,QCFxCM,EAAS,SACTC,EAAU,UACVC,EAAS,SACTC,EAAS,SAETC,EAAa,aAGbC,EAA8B,gCAAXC,qBAAAA,UAAuBA,OAAOC,iBAIjDC,GACJ,QACA,OACA,mBACA,SACA,SACA,WARsC,eAAgBC,KAYpB,WAAa,UAO3CC,EAAiB,SAACpB,YAClBqB,iBACGrB,EAAIsB,YAAc,iBAiBrBC,IAEHb,EAAQC,EAASC,EAAQE,IAIzBJ,EAAQC,EAASC,EAAQC,IAGzBD,EAAQD,EAASD,IAGjBG,EAAQD,IAIRC,EAAQH,IACRG,EAAQF,IACTa,IA1BsB,SAACC,UAAQA,EAAIC,OAAO,SAACC,EAAKC,EAAKC,YACjDD,GAAOC,EACJF,SA+DHG,EAAkB,kBAClBC,SAASC,kBAAoBpB,EACxBA,EAELmB,SAASE,WACJvB,EAEFC,UCjHM,wGD+HLuB,EAAQJ,aAETK,OAASD,IACTE,qBAGAC,cAAgBC,EAAKD,cAAcE,UAGjCpC,QAAQ,SAACH,UAAQwC,iBAAiBxC,EAAKsC,EAAKD,eAAe,KAO9DtB,oBACe,eAAgB,SAACf,KAC3ByC,2BAA6BC,WAAW,WACrC1C,EAAI2C,kBAAoB3C,EAAIsB,YAAYsB,OAAS,KAChDC,yBAAyB7C,EAAKY,IAEpC,kBA9B4BzB,gDAwDnB2D,IAGXlD,KAAKwC,gBAAgBtC,QAAQgD,IAAO,IAGH,IAAhClD,KAAKwC,gBAAgBQ,yBACN,eAAgBxB,QAE9BgB,gBAAgB1C,KAAKoD,iDAQTA,OACbC,EAAUnD,KAAKwC,gBAAgBtC,QAAQgD,GAEzCC,GAAW,SACRX,gBAAgBrC,OAAOgD,EAAS,GAGD,IAAhCnD,KAAKwC,gBAAgBQ,4BACH,eAAgBxB,qDAUjBX,EAAeF,MAClCA,IAAaX,KAAKuC,eAEda,EAvIwB,SAACxC,EAAUD,OAGxC,IAAI0C,EAAOC,EAAI,EAAGD,EAAQ1B,EAAwB2B,KAAMA,EAAG,KACxDC,EAAWF,EAAMzC,GACjB4C,EAAWH,EAAM1C,MAEnB4C,GAAY,GACZC,GAAY,GACZA,EAAWD,SAGNE,OAAOC,KAAKL,GAAOM,MAAMJ,EAAUC,EAAW,YA2HxCI,CADI5D,KAAKuC,OAC6B5B,GAE1C2C,EAAI,EAAGA,EAAIF,EAAKJ,OAAS,IAAKM,EAAG,KAClC1C,EAAWwC,EAAKE,GAChB3C,EAAWyC,EAAKE,EAAI,QAErBf,OAAS5B,OACTkD,cAAc,IAAIpD,EAAiB,+FAahCL,UACRe,gBACWnB,KAAK6C,4BAGZzC,EAAIT,UACL,eACA,cACEsD,yBAAyB7C,EAAK8B,eAEhC,aACEe,yBAAyB7C,EAAKU,aAEhC,OAGCd,KAAKuC,SAAWzB,QACbmC,yBAAyB7C,EAAK8B,eAGlC,eACA,cACEe,yBAAyB7C,EAAKA,EAAI0D,UAAY7C,EAASC,aAEzD,mBAIClB,KAAKuC,SAAWtB,GAChBjB,KAAKuC,SAAWrB,QACb+B,yBAAyB7C,EAAK8B,eAGlC,cACEe,yBAAyB7C,EAAKa,yCA7GhCjB,KAAKuC,uDAULJ,SAAS4B,eAAgB"} -------------------------------------------------------------------------------- /dist/lifecycle.mjs: -------------------------------------------------------------------------------- 1 | /*! 2 | Copyright 2018 Google Inc. All Rights Reserved. 3 | Licensed under the Apache License, Version 2.0 (the "License"); 4 | you may not use this file except in compliance with the License. 5 | You may obtain a copy of the License at 6 | 7 | http://www.apache.org/licenses/LICENSE-2.0 8 | 9 | Unless required by applicable law or agreed to in writing, software 10 | distributed under the License is distributed on an "AS IS" BASIS, 11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | See the License for the specific language governing permissions and 13 | limitations under the License. 14 | */ 15 | /*! lifecycle.mjs v0.1.1 */ 16 | let e;try{new EventTarget,e=!0}catch(t){e=!1}class t{constructor(){this.e={}}addEventListener(e,t,s=!1){this.t(e).push(t)}removeEventListener(e,t,s=!1){const i=this.t(e),a=i.indexOf(t);a>-1&&i.splice(a,1)}dispatchEvent(e){return e.target=this,Object.freeze(e),this.t(e.type).forEach(t=>t(e)),!0}t(e){return this.e[e]=this.e[e]||[]}}var s=e?EventTarget:t;class i{constructor(e){this.type=e}}var a=e?Event:i;class n extends a{constructor(e,t){super(e),this.newState=t.newState,this.oldState=t.oldState,this.originalEvent=t.originalEvent}}const r="active",h="passive",c="hidden",o="frozen",d="terminated",u="object"==typeof safari&&safari.pushNotification,v="onpageshow"in self,l=["focus","blur","visibilitychange","freeze","resume","pageshow",v?"pagehide":"unload"],g=e=>(e.preventDefault(),e.returnValue="Are you sure?"),f=e=>e.reduce((e,t,s)=>(e[t]=s,e),{}),b=[[r,h,c,d],[r,h,c,o],[c,h,r],[o,c],[o,r],[o,h]].map(f),p=(e,t)=>{for(let s,i=0;s=b[i];++i){const i=s[e],a=s[t];if(i>=0&&a>=0&&a>i)return Object.keys(s).slice(i,a+1)}return[]},E=()=>document.visibilityState===c?c:document.hasFocus()?r:h;class m extends s{constructor(){super();const e=E();this.s=e,this.i=[],this.a=this.a.bind(this),l.forEach(e=>addEventListener(e,this.a,!0)),u&&addEventListener("beforeunload",e=>{this.n=setTimeout(()=>{e.defaultPrevented||e.returnValue.length>0||this.r(e,c)},0)})}get state(){return this.s}get pageWasDiscarded(){return document.wasDiscarded||!1}addUnsavedChanges(e){!this.i.indexOf(e)>-1&&(0===this.i.length&&addEventListener("beforeunload",g),this.i.push(e))}removeUnsavedChanges(e){const t=this.i.indexOf(e);t>-1&&(this.i.splice(t,1),0===this.i.length&&removeEventListener("beforeunload",g))}r(e,t){if(t!==this.s){const s=this.s,i=p(s,t);for(let t=0;t -1) {\n typeRegistry.splice(handlerIndex, 1);\n }\n }\n\n /**\n * @param {!Event|!EventShim} evt\n * @return {boolean}\n * @see https://dom.spec.whatwg.org/#dom-eventtarget-dispatchevent\n */\n dispatchEvent(evt) {\n // Set the target then freeze the event object to prevent modification.\n evt.target = this;\n Object.freeze(evt);\n\n this._getRegistry(evt.type).forEach((listener) => listener(evt));\n return true;\n }\n\n /**\n * Returns an array of handlers associated with the passed event type.\n * If no handlers have been registered, an empty array is returned.\n * @private\n * @param {string} type The event type.\n * @return {!Array} An array of handler functions.\n */\n _getRegistry(type) {\n return this._registry[type] = (this._registry[type] || []);\n }\n}\n\nexport default supportsConstructableEventTarget ? EventTarget : EventTargetShim;\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport {supportsConstructableEventTarget} from './support.mjs';\n\n/**\n * A minimal Event class shim.\n * This is used if the browser doesn't natively support constructable\n * EventTarget objects.\n */\nclass EventShim {\n /**\n * @param {string} type\n */\n constructor(type) {\n this.type = type;\n }\n}\n\nexport default supportsConstructableEventTarget ? Event : EventShim;\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport Event from './shims/Event.mjs';\n\n/**\n * implements {IStateChangeEvent}\n */\nexport default class StateChangeEvent extends Event {\n /**\n * @param {string} type\n * @param {!Object} initDict\n */\n constructor(type, initDict) {\n super(type);\n this.newState = initDict.newState;\n this.oldState = initDict.oldState;\n this.originalEvent = initDict.originalEvent;\n }\n}\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport EventTarget from './shims/EventTarget.mjs';\nimport StateChangeEvent from './StateChangeEvent.mjs';\n\nconst ACTIVE = 'active';\nconst PASSIVE = 'passive';\nconst HIDDEN = 'hidden';\nconst FROZEN = 'frozen';\n// const DISCARDED = 'discarded'; Not used but show to completeness.\nconst TERMINATED = 'terminated';\n\n// Detect Safari to work around Safari-specific bugs.\nconst IS_SAFARI = typeof safari === 'object' && safari.pushNotification;\n\nconst SUPPORTS_PAGE_TRANSITION_EVENTS = 'onpageshow' in self;\n\nconst EVENTS = [\n 'focus',\n 'blur',\n 'visibilitychange',\n 'freeze',\n 'resume',\n 'pageshow',\n // IE9-10 do not support the pagehide event, so we fall back to unload\n // Note: unload *MUST ONLY* be added conditionally, otherwise it will\n // prevent page navigation caching (a.k.a bfcache).\n SUPPORTS_PAGE_TRANSITION_EVENTS ? 'pagehide' : 'unload',\n];\n\n/**\n * @param {!Event} evt\n * @return {string}\n */\nconst onbeforeunload = (evt) => {\n evt.preventDefault();\n return evt.returnValue = 'Are you sure?';\n};\n\n/**\n * Converts an array of states into an object where the state is the key\n * and the value is the index.\n * @param {!Array} arr\n * @return {!Object}\n */\nconst toIndexedObject = (arr) => arr.reduce((acc, val, idx) => {\n acc[val] = idx;\n return acc;\n}, {});\n\n/**\n * @type {!Array}\n */\nconst LEGAL_STATE_TRANSITIONS = [\n // The normal unload process (bfcache process is addressed above).\n [ACTIVE, PASSIVE, HIDDEN, TERMINATED],\n\n // An active page transitioning to frozen,\n // or an unloading page going into the bfcache.\n [ACTIVE, PASSIVE, HIDDEN, FROZEN],\n\n // A hidden page transitioning back to active.\n [HIDDEN, PASSIVE, ACTIVE],\n\n // A frozen page being resumed\n [FROZEN, HIDDEN],\n\n // A frozen (bfcached) page navigated back to\n // Note: [FROZEN, HIDDEN] can happen here, but it's already covered above.\n [FROZEN, ACTIVE],\n [FROZEN, PASSIVE],\n].map(toIndexedObject);\n\n/**\n * Accepts a current state and a future state and returns an array of legal\n * state transition paths. This is needed to normalize behavior across browsers\n * since some browsers do not fire events in certain cases and thus skip\n * states.\n * @param {string} oldState\n * @param {string} newState\n * @return {!Array}\n */\nconst getLegalStateTransitionPath = (oldState, newState) => {\n // We're intentionally not using for...of here so when we transpile to ES5\n // we don't need to include the Symbol polyfills.\n for (let order, i = 0; order = LEGAL_STATE_TRANSITIONS[i]; ++i) {\n const oldIndex = order[oldState];\n const newIndex = order[newState];\n\n if (oldIndex >= 0 &&\n newIndex >= 0 &&\n newIndex > oldIndex) {\n // Differences greater than one should be reported\n // because it means a state was skipped.\n return Object.keys(order).slice(oldIndex, newIndex + 1);\n }\n }\n return [];\n // TODO(philipwalton): it shouldn't be possible to get here, but\n // consider some kind of warning or call to action if it happens.\n // console.warn(`Invalid state change detected: ${oldState} > ${newState}`);\n};\n\n/**\n * Returns the current state based on the document's visibility and\n * in input focus states. Note this method is only used to determine\n * active vs passive vs hidden states, as other states require listening\n * for events.\n * @return {string}\n */\nconst getCurrentState = () => {\n if (document.visibilityState === HIDDEN) {\n return HIDDEN;\n }\n if (document.hasFocus()) {\n return ACTIVE;\n }\n return PASSIVE;\n};\n\n/**\n * Class definition for the exported, singleton lifecycle instance.\n */\nexport default class Lifecycle extends EventTarget {\n /**\n * Initializes state, state history, and adds event listeners to monitor\n * state changes.\n */\n constructor() {\n super();\n\n const state = getCurrentState();\n\n this._state = state;\n this._unsavedChanges = [];\n\n // Bind the callback and add event listeners.\n this._handleEvents = this._handleEvents.bind(this);\n\n // Add capturing events on window so they run immediately.\n EVENTS.forEach((evt) => addEventListener(evt, this._handleEvents, true));\n\n // Safari does not reliably fire the `pagehide` or `visibilitychange`\n // events when closing a tab, so we have to use `beforeunload` with a\n // timeout to check whether the default action was prevented.\n // NOTE: we only add this to Safari because adding it to Firefox would\n // prevent the page from being eligible for bfcache.\n if (IS_SAFARI) {\n addEventListener('beforeunload', (evt) => {\n this._safariBeforeUnloadTimeout = setTimeout(() => {\n if (!(evt.defaultPrevented || evt.returnValue.length > 0)) {\n this._dispatchChangesIfNeeded(evt, HIDDEN);\n }\n }, 0);\n });\n }\n }\n\n /**\n * @return {string}\n */\n get state() {\n return this._state;\n }\n\n /**\n * Returns the value of document.wasDiscarded. This is arguably unnecessary\n * but I think there's value in having the entire API in one place and\n * consistent across browsers.\n * @return {boolean}\n */\n get pageWasDiscarded() {\n return document.wasDiscarded || false;\n }\n\n /**\n * @param {Symbol|Object} id A unique symbol or object identifying the\n *. pending state. This ID is required when removing the state later.\n */\n addUnsavedChanges(id) {\n // Don't add duplicate state. Note: ideall this would be a set, but for\n // better browser compatibility we're using an array.\n if (!this._unsavedChanges.indexOf(id) > -1) {\n // If this is the first state being added,\n // also add a beforeunload listener.\n if (this._unsavedChanges.length === 0) {\n addEventListener('beforeunload', onbeforeunload);\n }\n this._unsavedChanges.push(id);\n }\n }\n\n /**\n * @param {Symbol|Object} id A unique symbol or object identifying the\n *. pending state. This ID is required when removing the state later.\n */\n removeUnsavedChanges(id) {\n const idIndex = this._unsavedChanges.indexOf(id);\n\n if (idIndex > -1) {\n this._unsavedChanges.splice(idIndex, 1);\n\n // If there's no more pending state, remove the event listener.\n if (this._unsavedChanges.length === 0) {\n removeEventListener('beforeunload', onbeforeunload);\n }\n }\n }\n\n /**\n * @private\n * @param {!Event} originalEvent\n * @param {string} newState\n */\n _dispatchChangesIfNeeded(originalEvent, newState) {\n if (newState !== this._state) {\n const oldState = this._state;\n const path = getLegalStateTransitionPath(oldState, newState);\n\n for (let i = 0; i < path.length - 1; ++i) {\n const oldState = path[i];\n const newState = path[i + 1];\n\n this._state = newState;\n this.dispatchEvent(new StateChangeEvent('statechange', {\n oldState,\n newState,\n originalEvent,\n }));\n }\n }\n }\n\n /**\n * @private\n * @param {!Event} evt\n */\n _handleEvents(evt) {\n if (IS_SAFARI) {\n clearTimeout(this._safariBeforeUnloadTimeout);\n }\n\n switch (evt.type) {\n case 'pageshow':\n case 'resume':\n this._dispatchChangesIfNeeded(evt, getCurrentState());\n break;\n case 'focus':\n this._dispatchChangesIfNeeded(evt, ACTIVE);\n break;\n case 'blur':\n // The `blur` event can fire while the page is being unloaded, so we\n // only need to update the state if the current state is \"active\".\n if (this._state === ACTIVE) {\n this._dispatchChangesIfNeeded(evt, getCurrentState());\n }\n break;\n case 'pagehide':\n case 'unload':\n this._dispatchChangesIfNeeded(evt, evt.persisted ? FROZEN : TERMINATED);\n break;\n case 'visibilitychange':\n // The document's `visibilityState` will change to hidden as the page\n // is being unloaded, but in such cases the lifecycle state shouldn't\n // change.\n if (this._state !== FROZEN &&\n this._state !== TERMINATED) {\n this._dispatchChangesIfNeeded(evt, getCurrentState());\n }\n break;\n case 'freeze':\n this._dispatchChangesIfNeeded(evt, FROZEN);\n break;\n }\n }\n}\n","/*\n Copyright 2018 Google Inc. All Rights Reserved.\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\n\nimport Lifecycle from './Lifecycle.mjs';\n\nexport default new Lifecycle();\n"],"names":["supportsConstructableEventTarget","EventTarget","err","EventTargetShim","[object Object]","this","_registry","type","listener","opts","_getRegistry","push","typeRegistry","handlerIndex","indexOf","splice","evt","target","Object","freeze","forEach","EventShim","Event","StateChangeEvent","initDict","super","newState","oldState","originalEvent","ACTIVE","PASSIVE","HIDDEN","FROZEN","TERMINATED","IS_SAFARI","safari","pushNotification","SUPPORTS_PAGE_TRANSITION_EVENTS","self","EVENTS","onbeforeunload","preventDefault","returnValue","toIndexedObject","arr","reduce","acc","val","idx","LEGAL_STATE_TRANSITIONS","map","getLegalStateTransitionPath","order","i","oldIndex","newIndex","keys","slice","getCurrentState","document","visibilityState","hasFocus","Lifecycle","state","_state","_unsavedChanges","_handleEvents","bind","addEventListener","_safariBeforeUnloadTimeout","setTimeout","defaultPrevented","length","_dispatchChangesIfNeeded","pageWasDiscarded","wasDiscarded","id","idIndex","removeEventListener","path","dispatchEvent","clearTimeout","persisted"],"mappings":";;;;;;;;;;;;;;;AAeA,IAAIA,EAEJ,IACE,IAAIC,YAKJD,GAAmC,EACnC,MAAOE,GACPF,GAAmC,QCF/BG,EAIJC,cACEC,KAAKC,KAUPF,iBAAiBG,EAAMC,EAAUC,GAAO,GACtCJ,KAAKK,EAAaH,GAAMI,KAAKH,GAU/BJ,oBAAoBG,EAAMC,EAAUC,GAAO,GACzC,MAAMG,EAAeP,KAAKK,EAAaH,GACjCM,EAAeD,EAAaE,QAAQN,GACtCK,GAAgB,GAClBD,EAAaG,OAAOF,EAAc,GAStCT,cAAcY,GAMZ,OAJAA,EAAIC,OAASZ,KACba,OAAOC,OAAOH,GAEdX,KAAKK,EAAaM,EAAIT,MAAMa,QAASZ,GAAaA,EAASQ,KACpD,EAUTZ,EAAaG,GACX,OAAOF,KAAKC,EAAUC,GAASF,KAAKC,EAAUC,QAIlD,MAAeP,EAAmCC,YAAcE,QC7D1DkB,EAIJjB,YAAYG,GACVF,KAAKE,KAAOA,GAIhB,MAAeP,EAAmCsB,MAAQD,QCXrCE,UAAyBD,EAK5ClB,YAAYG,EAAMiB,GAChBC,MAAMlB,GACNF,KAAKqB,SAAWF,EAASE,SACzBrB,KAAKsB,SAAWH,EAASG,SACzBtB,KAAKuB,cAAgBJ,EAASI,eCXlC,MAAMC,EAAS,SACTC,EAAU,UACVC,EAAS,SACTC,EAAS,SAETC,EAAa,aAGbC,EAA8B,iBAAXC,QAAuBA,OAAOC,iBAEjDC,EAAkC,eAAgBC,KAElDC,GACJ,QACA,OACA,mBACA,SACA,SACA,WAIAF,EAAkC,WAAa,UAO3CG,EAAkBxB,IACtBA,EAAIyB,iBACGzB,EAAI0B,YAAc,iBASrBC,EAAmBC,GAAQA,EAAIC,OAAO,CAACC,EAAKC,EAAKC,KACrDF,EAAIC,GAAOC,EACJF,OAMHG,IAEHpB,EAAQC,EAASC,EAAQE,IAIzBJ,EAAQC,EAASC,EAAQC,IAGzBD,EAAQD,EAASD,IAGjBG,EAAQD,IAIRC,EAAQH,IACRG,EAAQF,IACToB,IAAIP,GAWAQ,EAA8B,CAACxB,EAAUD,KAG7C,IAAK,IAAI0B,EAAOC,EAAI,EAAGD,EAAQH,EAAwBI,KAAMA,EAAG,CAC9D,MAAMC,EAAWF,EAAMzB,GACjB4B,EAAWH,EAAM1B,GAEvB,GAAI4B,GAAY,GACZC,GAAY,GACZA,EAAWD,EAGb,OAAOpC,OAAOsC,KAAKJ,GAAOK,MAAMH,EAAUC,EAAW,GAGzD,UAaIG,EAAkB,IAClBC,SAASC,kBAAoB7B,EACxBA,EAEL4B,SAASE,WACJhC,EAEFC,QAMYgC,UAAkB7D,EAKrCG,cACEqB,QAEA,MAAMsC,EAAQL,IAEdrD,KAAK2D,EAASD,EACd1D,KAAK4D,KAGL5D,KAAK6D,EAAgB7D,KAAK6D,EAAcC,KAAK9D,MAG7CkC,EAAOnB,QAASJ,GAAQoD,iBAAiBpD,EAAKX,KAAK6D,GAAe,IAO9DhC,GACFkC,iBAAiB,eAAiBpD,IAChCX,KAAKgE,EAA6BC,WAAW,KACrCtD,EAAIuD,kBAAoBvD,EAAI0B,YAAY8B,OAAS,GACrDnE,KAAKoE,EAAyBzD,EAAKe,IAEpC,KAQTgC,YACE,OAAO1D,KAAK2D,EASdU,uBACE,OAAOf,SAASgB,eAAgB,EAOlCvE,kBAAkBwE,IAGXvE,KAAK4D,EAAgBnD,QAAQ8D,IAAO,IAGH,IAAhCvE,KAAK4D,EAAgBO,QACvBJ,iBAAiB,eAAgB5B,GAEnCnC,KAAK4D,EAAgBtD,KAAKiE,IAQ9BxE,qBAAqBwE,GACnB,MAAMC,EAAUxE,KAAK4D,EAAgBnD,QAAQ8D,GAEzCC,GAAW,IACbxE,KAAK4D,EAAgBlD,OAAO8D,EAAS,GAGD,IAAhCxE,KAAK4D,EAAgBO,QACvBM,oBAAoB,eAAgBtC,IAU1CpC,EAAyBwB,EAAeF,GACtC,GAAIA,IAAarB,KAAK2D,EAAQ,CAC5B,MAAMrC,EAAWtB,KAAK2D,EAChBe,EAAO5B,EAA4BxB,EAAUD,GAEnD,IAAK,IAAI2B,EAAI,EAAGA,EAAI0B,EAAKP,OAAS,IAAKnB,EAAG,CACxC,MAAM1B,EAAWoD,EAAK1B,GAChB3B,EAAWqD,EAAK1B,EAAI,GAE1BhD,KAAK2D,EAAStC,EACdrB,KAAK2E,cAAc,IAAIzD,EAAiB,eACtCI,SAAAA,EACAD,SAAAA,EACAE,cAAAA,OAURxB,EAAcY,GAKZ,OAJIkB,GACF+C,aAAa5E,KAAKgE,GAGZrD,EAAIT,MACV,IAAK,WACL,IAAK,SACHF,KAAKoE,EAAyBzD,EAAK0C,KACnC,MACF,IAAK,QACHrD,KAAKoE,EAAyBzD,EAAKa,GACnC,MACF,IAAK,OAGCxB,KAAK2D,IAAWnC,GAClBxB,KAAKoE,EAAyBzD,EAAK0C,KAErC,MACF,IAAK,WACL,IAAK,SACHrD,KAAKoE,EAAyBzD,EAAKA,EAAIkE,UAAYlD,EAASC,GAC5D,MACF,IAAK,mBAIC5B,KAAK2D,IAAWhC,GAChB3B,KAAK2D,IAAW/B,GAClB5B,KAAKoE,EAAyBzD,EAAK0C,KAErC,MACF,IAAK,SACHrD,KAAKoE,EAAyBzD,EAAKgB,KC3Q3C,MAAe,IAAI8B"} -------------------------------------------------------------------------------- /dist/lifecycle.native.mjs: -------------------------------------------------------------------------------- 1 | /*! 2 | Copyright 2018 Google Inc. All Rights Reserved. 3 | Licensed under the Apache License, Version 2.0 (the "License"); 4 | you may not use this file except in compliance with the License. 5 | You may obtain a copy of the License at 6 | 7 | http://www.apache.org/licenses/LICENSE-2.0 8 | 9 | Unless required by applicable law or agreed to in writing, software 10 | distributed under the License is distributed on an "AS IS" BASIS, 11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 | See the License for the specific language governing permissions and 13 | limitations under the License. 14 | */ 15 | /*! lifecycle.native.mjs v0.1.1 */ 16 | class e extends Event{constructor(e,t){super(e),this.newState=t.newState,this.oldState=t.oldState,this.originalEvent=t.originalEvent}}const t="active",s="passive",i="hidden",a="frozen",n="terminated",r="object"==typeof safari&&safari.pushNotification,h="onpageshow"in self,o=["focus","blur","visibilitychange","freeze","resume","pageshow",h?"pagehide":"unload"],c=e=>(e.preventDefault(),e.returnValue="Are you sure?"),d=e=>e.reduce((e,t,s)=>(e[t]=s,e),{}),u=[[t,s,i,n],[t,s,i,a],[i,s,t],[a,i],[a,t],[a,s]].map(d),l=(e,t)=>{for(let s,i=0;s=u[i];++i){const i=s[e],a=s[t];if(i>=0&&a>=0&&a>i)return Object.keys(s).slice(i,a+1)}return[]},f=()=>document.visibilityState===i?i:document.hasFocus()?t:s;class v extends EventTarget{constructor(){super();const e=f();this.e=e,this.t=[],this.s=this.s.bind(this),o.forEach(e=>addEventListener(e,this.s,!0)),r&&addEventListener("beforeunload",e=>{this.i=setTimeout(()=>{e.defaultPrevented||e.returnValue.length>0||this.a(e,i)},0)})}get state(){return this.e}get pageWasDiscarded(){return document.wasDiscarded||!1}addUnsavedChanges(e){!this.t.indexOf(e)>-1&&(0===this.t.length&&addEventListener("beforeunload",c),this.t.push(e))}removeUnsavedChanges(e){const t=this.t.indexOf(e);t>-1&&(this.t.splice(t,1),0===this.t.length&&removeEventListener("beforeunload",c))}a(t,s){if(s!==this.e){const i=this.e,a=l(i,s);for(let s=0;s