├── .gitignore ├── .npmignore ├── .travis.yml ├── LICENSE.txt ├── README.md ├── coverage ├── coverage.json ├── lcov-report │ ├── base.css │ ├── index.html │ ├── introspected │ │ ├── index.html │ │ └── introspected.js.html │ ├── prettify.css │ ├── prettify.js │ ├── sort-arrow-sprite.png │ └── sorter.js └── lcov.info ├── index.html ├── introspected.js ├── min.js ├── package.json └── test ├── class-state.js ├── how-to-diff.js └── introspected.js /.gitignore: -------------------------------------------------------------------------------- 1 | .DS_Store 2 | node_modules/ -------------------------------------------------------------------------------- /.npmignore: -------------------------------------------------------------------------------- 1 | coverage/* 2 | node_modules/* 3 | test 4 | test/* 5 | test/introspected.js 6 | .gitignore 7 | .travis.yml 8 | index.html 9 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: node_js 2 | node_js: 3 | - 6 4 | - 8 5 | git: 6 | depth: 1 7 | branches: 8 | only: 9 | - master 10 | after_success: 11 | - "npm run coveralls" 12 | -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | ISC License 2 | 3 | Copyright (c) 2017, Andrea Giammarchi, @WebReflection 4 | 5 | Permission to use, copy, modify, and/or distribute this software for any 6 | purpose with or without fee is hereby granted, provided that the above 7 | copyright notice and this permission notice appear in all copies. 8 | 9 | THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH 10 | REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 | AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 12 | INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 | LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 | OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 | PERFORMANCE OF THIS SOFTWARE. 16 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Introspected 2 | 3 | [![Build Status](https://travis-ci.org/WebReflection/introspected.svg?branch=master)](https://travis-ci.org/WebReflection/introspected) [![Coverage Status](https://coveralls.io/repos/github/WebReflection/introspected/badge.svg?branch=master)](https://coveralls.io/github/WebReflection/introspected?branch=master) [![donate](https://img.shields.io/badge/$-donate-ff69b4.svg?maxAge=2592000&style=flat)](https://github.com/WebReflection/donate) 4 | 5 | [Medium presentation post](https://medium.com/@WebReflection/introspected-js-objects-without-secrets-55cf0bd3dccc) 6 | - - - 7 | 8 | If you'd like to be notified about any possible change that could happen to a JSON compatible model / data / object / array / structure, 9 | including the possibility to retrieve the exact full path of the object that changed and eventually walk through it, 10 | you've reached your destination. 11 | 12 | ```js 13 | const data = Introspected( 14 | // any object or JSON compatible structure 15 | // even with nested properties, objects, arrays 16 | JSON.parse('{}'), 17 | (root, path) => { 18 | // the root object that changed 19 | console.log(root); 20 | // the path that just changed 21 | console.log(path); 22 | } 23 | ); 24 | 25 | // now try the following in console 26 | data.a.b.c.d.e.f.g = 'whatever'; 27 | data.array.value = [1, 2, 3]; 28 | data.array.value.push(4); 29 | // see all notifications about all changes 🎉 30 | 31 | JSON.stringify(data); 32 | // {"a":{"b":{"c":{"d":{"e":{"f":{"g":"whatever"}}}}}},"array":{"value":[1,2,3,4]}} 33 | ``` 34 | 35 | 36 | # API 37 | 38 | * `Introspected(objectOrArray[, callback])` create a new `Introspected` object capable of having infinite depth without ever throwing errors 39 | * `Introspected.observe(objectOrArray, callback)` crate a `Introspected` with a notifier per each change, or set a notifier per each change to an existent `Introspected` object 40 | * `Introspected.pathValue(objectOrArray, path)` walk through an object via a provided path. A `path` is an `Array` of properties, it is usually the one received through the notifier whenever a `Introspected` object is **observed**. 41 | 42 | 43 | # Compatibility 44 | 45 | Any spec compliant ES2015 JavaScript engine. 46 | 47 | (that means native `WeakMap`, `Proxy` and `Symbol.toPrimitive` too) 48 | 49 | [Live test page](https://webreflection.github.io/introspected/) 50 | 51 | **Working:** NodeJS 6+, Chrome, Safari, GNOME Web, Edge, Firefox, Samsung Internet (Chrome 51) 52 | 53 | **Not there yet:** UC Browser (WebKit 534) 54 | 55 | 56 | ## ISC License 57 | 58 | -------------------------------------------------------------------------------- /coverage/coverage.json: -------------------------------------------------------------------------------- 1 | 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.sorter { 142 | height: 10px; 143 | width: 7px; 144 | display: inline-block; 145 | margin-left: 0.5em; 146 | background: url(sort-arrow-sprite.png) no-repeat scroll 0 0 transparent; 147 | } 148 | .coverage-summary .sorted .sorter { 149 | background-position: 0 -20px; 150 | } 151 | .coverage-summary .sorted-desc .sorter { 152 | background-position: 0 -10px; 153 | } 154 | .status-line { height: 10px; } 155 | /* dark red */ 156 | .red.solid, .status-line.low, .low .cover-fill { background:#C21F39 } 157 | .low .chart { border:1px solid #C21F39 } 158 | /* medium red */ 159 | .cstat-no, .fstat-no, .cbranch-no, .cbranch-no { background:#F6C6CE } 160 | /* light red */ 161 | .low, .cline-no { background:#FCE1E5 } 162 | /* light green */ 163 | .high, .cline-yes { background:rgb(230,245,208) } 164 | /* medium green */ 165 | .cstat-yes { background:rgb(161,215,106) } 166 | /* dark green */ 167 | .status-line.high, .high .cover-fill { background:rgb(77,146,33) } 168 | .high .chart { border:1px solid rgb(77,146,33) } 169 | /* dark yellow (gold) */ 170 | .medium .chart { border:1px solid #f9cd0b; } 171 | .status-line.medium, .medium .cover-fill { background: #f9cd0b; } 172 | /* light yellow */ 173 | .medium { background: #fff4c2; } 174 | /* light gray */ 175 | span.cline-neutral { background: #eaeaea; } 176 | 177 | .cbranch-no { background: yellow !important; color: #111; } 178 | 179 | .cstat-skip { background: #ddd; color: #111; } 180 | .fstat-skip { background: #ddd; color: #111 !important; } 181 | .cbranch-skip { background: #ddd !important; color: #111; } 182 | 183 | 184 | .cover-fill, .cover-empty { 185 | display:inline-block; 186 | height: 12px; 187 | } 188 | .chart { 189 | line-height: 0; 190 | } 191 | .cover-empty { 192 | background: white; 193 | } 194 | .cover-full { 195 | border-right: none !important; 196 | } 197 | pre.prettyprint { 198 | border: none !important; 199 | padding: 0 !important; 200 | margin: 0 !important; 201 | } 202 | .com { color: #999 !important; } 203 | .ignore-none { color: #999; font-weight: normal; } 204 | 205 | .wrapper { 206 | min-height: 100%; 207 | height: auto !important; 208 | height: 100%; 209 | margin: 0 auto -48px; 210 | } 211 | .footer, .push { 212 | height: 48px; 213 | } 214 | -------------------------------------------------------------------------------- /coverage/lcov-report/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Code coverage report for All files 5 | 6 | 7 | 8 | 9 | 14 | 15 | 16 |
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23 | 100% 24 | Statements 25 | 100/100 26 |
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79 | Code coverage 80 | generated by istanbul at Fri Jun 23 2017 15:46:32 GMT+0100 (BST) 81 |
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79 | Code coverage 80 | generated by istanbul at Fri Jun 23 2017 15:46:32 GMT+0100 (BST) 81 |
82 | 83 | 84 | 91 | 92 | 93 | 94 | -------------------------------------------------------------------------------- /coverage/lcov-report/introspected/introspected.js.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Code coverage report for introspected/introspected.js 5 | 6 | 7 | 8 | 9 | 14 | 15 | 16 |
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/*! (c) Andrea Giammarchi - @WebReflection - ISC License */
439 | var Introspected = ((O) => {'use strict';
440 |  
441 |   // commonly needed shortcuts
442 |   const SProto = Introspected.prototype;
443 |   const toString = O.prototype.toString;
444 |   const create = O.create;
445 |   const defineProperties = O.defineProperties;
446 |   const emptyArray = [];
447 |   const emptyString = () => '';
448 |   const getPrototypeOf = O.getPrototypeOf;
449 |   const isArray = Array.isArray;
450 |   const keys = O.keys;
451 |   const toPrimitive = Symbol.toPrimitive;
452 |  
453 |   // weakly holds all known references
454 |   // avoid useless Proxies when already known
455 |   const known = new WeakMap();
456 |  
457 |   // triggered on Array changes
458 |   const ArrayHandler = [
459 |     'copyWithin',
460 |     'fill',
461 |     'pop',
462 |     'push',
463 |     'reverse',
464 |     'shift',
465 |     'sort',
466 |     'splice',
467 |     'unshift'
468 |   ].reduce((properties, method) => {
469 |     const fn = emptyArray[method];
470 |     if (fn) properties[method] = {
471 |       value() {
472 |         const result = fn.apply(this, arguments);
473 |         const length = this.length;
474 |         const info = known.get(this);
475 |         for (let i = 0; i < length; i++) {
476 |           const value = this[i];
477 |           if (typeof value === 'object' && value != null) {
478 |             setValue(info.O, this, info.$, i, value);
479 |           }
480 |         }
481 |         info.O(emptyArray);
482 |         return result;
483 |       }
484 |     };
485 |     return properties;
486 |   }, {});
487 |  
488 |   // each Introspected is proxied through this handler
489 |   const IntrospectedHandler = {
490 |     // notify if necessary
491 |     deleteProperty(target, prop) {
492 |       if (prop in target && delete target[prop] && known.has(target)) {
493 |         known.get(target).O(prop);
494 |       }
495 |       return true;
496 |     },
497 |     // return the correct prototype
498 |     getPrototypeOf() {
499 |         return SProto;
500 |     },
501 |     // the check to do to know if a path exists
502 |     has(target, prop) {
503 |         return prop in target;
504 |     },
505 |     // returns proxied model or create an empty one
506 |     get(target, prop) {
507 |       switch (true) {
508 |         case prop in target:
509 |           return target[prop];
510 |         case prop === toPrimitive:
511 |         case prop === 'toString':
512 |           return emptyString;
513 |         case prop === 'toJSON':
514 |           return () => target;
515 |         default:
516 |           const info = known.get(target);
517 |           return (target[prop] = register(
518 |             info.O,
519 |             create(null),
520 |             info.$.concat(prop)
521 |           )._);
522 |       }
523 |     },
524 |     // triggers only on actual changes
525 |     set(target, prop, value) {
526 |       if ((prop in target ? target[prop] : void 0) !== value) {
527 |         const info = known.get(target);
528 |         setValue(info.O, target, info.$, prop, value);
529 |         info.O(prop);
530 |       }
531 |       return true;
532 |     }
533 |   };
534 |  
535 |   function importArray(observer, value, path) {
536 |     const length = value.length;
537 |     const target = Array(length);
538 |     for (let i = 0; i < length; i++) {
539 |       setValue(observer, target, path, i, value[i]);
540 |     }
541 |     return register(observer, target, path);
542 |   }
543 |  
544 |   function importObject(observer, value, path) {
545 |     const properties = keys(value);
546 |     const length = properties.length;
547 |     const target = create(null);
548 |     for (let prop, i = 0; i < length; i++) {
549 |       prop = properties[i];
550 |       setValue(observer, target, path, prop, value[prop]);
551 |     }
552 |     return register(observer, target, path);
553 |   }
554 |  
555 |   function register(observer, target, paths) {
556 |     const info = {
557 |       _: wrap(target),
558 |       $: paths,
559 |       O: observer
560 |     };
561 |     known.set(target, info);
562 |     return info;
563 |   }
564 |  
565 |   function setValue(observer, target, path, prop, value) {
566 |     if (isArray(value)) {
567 |       target[prop] = (
568 |         known.get(value) ||
569 |         importArray(observer, value, path.concat(prop))
570 |       )._;
571 |     } else if(typeof value === 'object' && value != null) {
572 |       const object = getPrototypeOf(value) === SProto ?
573 |                       value.toJSON() : value;
574 |       target[prop] = toString.call(object) === '[object Date]' ?
575 |         object : (
576 |           known.get(object) ||
577 |           importObject(observer, object, path.concat(prop))
578 |         )._;
579 |     } else {
580 |       target[prop] = value;
581 |     }
582 |   }
583 |  
584 |   function wrap(target) {
585 |     return isArray(target) ?
586 |       defineProperties(target, ArrayHandler) :
587 |       new Proxy(target, IntrospectedHandler);
588 |   }
589 |  
590 |   function Introspected(target, callback) {
591 |     const isNull = target == null;
592 |     if (isNull || (
593 |       getPrototypeOf(target) !== SProto &&
594 |       !known.has(target)
595 |     )) {
596 |       const root = isNull || !isArray(target) ? create(null) : [];
597 |       const info = register(
598 |         function (path) {
599 |           const paths = this.$.concat(path);
600 |           info.O.$.forEach(fn => fn(info._, paths));
601 |         },
602 |         root,
603 |         emptyArray
604 |       );
605 |       info.O.$ = new Set();
606 |       if (!isNull) keys(target).forEach(
607 |         prop => setValue(info.O, root, emptyArray, prop, target[prop])
608 |       );
609 |       if (callback) {
610 |         info.O.$.add(callback);
611 |         callback(info._, []);
612 |       }
613 |       return info._;
614 |     } else {
615 |       if (callback) {
616 |         known.get(target.toJSON()).O.$.add(callback);
617 |         // don't notify other callbacks since no change was made
618 |         callback(target, []);
619 |       }
620 |       return target;
621 |     }
622 |   }
623 |  
624 |   Introspected.observe = Introspected;
625 |  
626 |   Introspected.pathValue = (model, path) =>
627 |     path.reduce((m, p) => (m && p in m) ? m[p] : void 0, model);
628 |  
629 |   return Introspected;
630 |  
631 | })(Object);
632 |  
633 | try { module.exports = Introspected; } catch(o_O) {}
634 |  
636 |
637 |
638 |
639 | Code coverage 640 | generated by istanbul at Fri Jun 23 2017 15:46:32 GMT+0100 (BST) 641 |
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-------------------------------------------------------------------------------- /coverage/lcov-report/sort-arrow-sprite.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/WebReflection/introspected/7ded3ce371534f55f2a09736d94666c7e04937b3/coverage/lcov-report/sort-arrow-sprite.png -------------------------------------------------------------------------------- /coverage/lcov-report/sorter.js: -------------------------------------------------------------------------------- 1 | var addSorting = (function () { 2 | "use strict"; 3 | var cols, 4 | currentSort = { 5 | index: 0, 6 | desc: false 7 | }; 8 | 9 | // returns the summary table element 10 | function getTable() { return document.querySelector('.coverage-summary'); } 11 | // returns the thead element of the summary table 12 | function getTableHeader() { return getTable().querySelector('thead tr'); } 13 | // returns the tbody element of the summary table 14 | function getTableBody() { return getTable().querySelector('tbody'); } 15 | // returns the th element for nth column 16 | function getNthColumn(n) { return getTableHeader().querySelectorAll('th')[n]; } 17 | 18 | // loads all columns 19 | function loadColumns() { 20 | var colNodes = getTableHeader().querySelectorAll('th'), 21 | colNode, 22 | cols = [], 23 | col, 24 | i; 25 | 26 | for (i = 0; i < colNodes.length; i += 1) { 27 | colNode = colNodes[i]; 28 | col = { 29 | key: colNode.getAttribute('data-col'), 30 | sortable: !colNode.getAttribute('data-nosort'), 31 | type: colNode.getAttribute('data-type') || 'string' 32 | }; 33 | cols.push(col); 34 | if (col.sortable) { 35 | col.defaultDescSort = col.type === 'number'; 36 | colNode.innerHTML = colNode.innerHTML + ''; 37 | } 38 | } 39 | return cols; 40 | } 41 | // attaches a data attribute to every tr element with an object 42 | // of data values keyed by column name 43 | function loadRowData(tableRow) { 44 | var tableCols = tableRow.querySelectorAll('td'), 45 | colNode, 46 | col, 47 | data = {}, 48 | i, 49 | val; 50 | for (i = 0; i < tableCols.length; i += 1) { 51 | colNode = tableCols[i]; 52 | col = cols[i]; 53 | val = colNode.getAttribute('data-value'); 54 | if (col.type === 'number') { 55 | val = Number(val); 56 | } 57 | data[col.key] = val; 58 | } 59 | return data; 60 | } 61 | // loads all row data 62 | function loadData() { 63 | var rows = getTableBody().querySelectorAll('tr'), 64 | i; 65 | 66 | for (i = 0; i < rows.length; i += 1) { 67 | rows[i].data = loadRowData(rows[i]); 68 | } 69 | } 70 | // sorts the table using the data for the ith column 71 | function sortByIndex(index, desc) { 72 | var key = cols[index].key, 73 | sorter = function (a, b) { 74 | a = a.data[key]; 75 | b = b.data[key]; 76 | return a < b ? -1 : a > b ? 1 : 0; 77 | }, 78 | finalSorter = sorter, 79 | tableBody = document.querySelector('.coverage-summary tbody'), 80 | rowNodes = tableBody.querySelectorAll('tr'), 81 | rows = [], 82 | i; 83 | 84 | if (desc) { 85 | finalSorter = function (a, b) { 86 | return -1 * sorter(a, b); 87 | }; 88 | } 89 | 90 | for (i = 0; i < rowNodes.length; i += 1) { 91 | rows.push(rowNodes[i]); 92 | tableBody.removeChild(rowNodes[i]); 93 | } 94 | 95 | rows.sort(finalSorter); 96 | 97 | for (i = 0; i < rows.length; i += 1) { 98 | tableBody.appendChild(rows[i]); 99 | } 100 | } 101 | // removes sort indicators for current column being sorted 102 | function removeSortIndicators() { 103 | var col = getNthColumn(currentSort.index), 104 | cls = col.className; 105 | 106 | cls = cls.replace(/ sorted$/, '').replace(/ sorted-desc$/, ''); 107 | col.className = cls; 108 | } 109 | // adds sort indicators for current column being sorted 110 | function addSortIndicators() { 111 | getNthColumn(currentSort.index).className += currentSort.desc ? ' sorted-desc' : ' sorted'; 112 | } 113 | // adds event listeners for all sorter widgets 114 | function enableUI() { 115 | var i, 116 | el, 117 | ithSorter = function ithSorter(i) { 118 | var col = cols[i]; 119 | 120 | return function () { 121 | var desc = col.defaultDescSort; 122 | 123 | if (currentSort.index === i) { 124 | desc = !currentSort.desc; 125 | } 126 | sortByIndex(i, desc); 127 | removeSortIndicators(); 128 | currentSort.index = i; 129 | currentSort.desc = desc; 130 | addSortIndicators(); 131 | }; 132 | }; 133 | for (i =0 ; i < cols.length; i += 1) { 134 | if (cols[i].sortable) { 135 | // add the click event handler on the th so users 136 | // dont have to click on those tiny arrows 137 | el = getNthColumn(i).querySelector('.sorter').parentElement; 138 | if (el.addEventListener) { 139 | el.addEventListener('click', ithSorter(i)); 140 | } else { 141 | el.attachEvent('onclick', ithSorter(i)); 142 | } 143 | } 144 | } 145 | } 146 | // adds sorting functionality to the UI 147 | return function () { 148 | if (!getTable()) { 149 | return; 150 | } 151 | cols = loadColumns(); 152 | loadData(cols); 153 | addSortIndicators(); 154 | enableUI(); 155 | }; 156 | })(); 157 | 158 | window.addEventListener('load', addSorting); 159 | -------------------------------------------------------------------------------- /coverage/lcov.info: -------------------------------------------------------------------------------- 1 | TN: 2 | SF:/home/webreflection/code/introspected/introspected.js 3 | FN:34,(anonymous_1) 4 | FN:54,(anonymous_2) 5 | FN:61,(anonymous_3) 6 | FN:65,(anonymous_4) 7 | FN:69,(anonymous_5) 8 | FN:88,(anonymous_6) 9 | FN:98,importArray 10 | FN:107,importObject 11 | FN:118,register 12 | FN:128,setValue 13 | FN:147,wrap 14 | FN:153,Introspected 15 | FN:161,(anonymous_13) 16 | FNF:13 17 | FNH:13 18 | FNDA:6,(anonymous_1) 19 | FNDA:2,(anonymous_2) 20 | FNDA:16,(anonymous_3) 21 | FNDA:3,(anonymous_4) 22 | FNDA:96,(anonymous_5) 23 | FNDA:16,(anonymous_6) 24 | FNDA:9,importArray 25 | FNDA:15,importObject 26 | FNDA:61,register 27 | FNDA:63,setValue 28 | FNDA:61,wrap 29 | FNDA:18,Introspected 30 | FNDA:22,(anonymous_13) 31 | DA:2,1 32 | DA:5,1 33 | DA:6,1 34 | DA:7,1 35 | DA:8,1 36 | DA:9,1 37 | DA:10,4 38 | DA:11,1 39 | DA:12,1 40 | DA:13,1 41 | DA:14,1 42 | DA:18,1 43 | DA:21,1 44 | DA:32,9 45 | DA:33,9 46 | DA:35,6 47 | DA:36,6 48 | DA:37,6 49 | DA:38,6 50 | DA:39,21 51 | DA:40,21 52 | DA:41,6 53 | DA:44,6 54 | DA:45,6 55 | DA:48,9 56 | DA:52,1 57 | DA:55,2 58 | DA:56,1 59 | DA:58,2 60 | DA:62,16 61 | DA:66,3 62 | DA:70,96 63 | DA:72,30 64 | DA:75,4 65 | DA:77,41 66 | DA:79,21 67 | DA:80,21 68 | DA:89,16 69 | DA:90,15 70 | DA:91,15 71 | DA:92,15 72 | DA:94,16 73 | DA:98,1 74 | DA:99,9 75 | DA:100,9 76 | DA:101,9 77 | DA:102,22 78 | DA:104,9 79 | DA:107,1 80 | DA:108,15 81 | DA:109,15 82 | DA:110,15 83 | DA:111,15 84 | DA:112,12 85 | DA:113,12 86 | DA:115,15 87 | DA:118,1 88 | DA:119,61 89 | DA:124,61 90 | DA:125,61 91 | DA:128,1 92 | DA:129,63 93 | DA:130,10 94 | DA:134,53 95 | DA:135,21 96 | DA:137,21 97 | DA:143,32 98 | DA:147,1 99 | DA:148,61 100 | DA:153,1 101 | DA:154,18 102 | DA:155,18 103 | DA:159,16 104 | DA:160,16 105 | DA:162,22 106 | DA:163,22 107 | DA:168,16 108 | DA:169,16 109 | DA:170,8 110 | DA:172,16 111 | DA:173,5 112 | DA:174,5 113 | DA:176,16 114 | DA:178,2 115 | DA:179,1 116 | DA:181,1 117 | DA:183,2 118 | DA:187,1 119 | DA:189,1 120 | DA:190,7 121 | DA:192,1 122 | DA:196,1 123 | LF:92 124 | LH:92 125 | BRDA:33,1,0,8 126 | BRDA:33,1,1,1 127 | BRDA:40,2,0,6 128 | BRDA:40,2,1,15 129 | BRDA:40,3,0,21 130 | BRDA:40,3,1,6 131 | BRDA:55,4,0,1 132 | BRDA:55,4,1,1 133 | BRDA:55,5,0,2 134 | BRDA:55,5,1,1 135 | BRDA:55,5,2,1 136 | BRDA:70,6,0,30 137 | BRDA:70,6,1,2 138 | BRDA:70,6,2,4 139 | BRDA:70,6,3,41 140 | BRDA:70,6,4,21 141 | BRDA:89,7,0,15 142 | BRDA:89,7,1,1 143 | BRDA:89,8,0,2 144 | BRDA:89,8,1,14 145 | BRDA:129,9,0,10 146 | BRDA:129,9,1,53 147 | BRDA:131,10,0,10 148 | BRDA:131,10,1,9 149 | BRDA:134,11,0,21 150 | BRDA:134,11,1,32 151 | BRDA:134,12,0,53 152 | BRDA:134,12,1,21 153 | BRDA:135,13,0,5 154 | BRDA:135,13,1,16 155 | BRDA:137,14,0,1 156 | BRDA:137,14,1,20 157 | BRDA:139,15,0,20 158 | BRDA:139,15,1,15 159 | BRDA:148,16,0,13 160 | BRDA:148,16,1,48 161 | BRDA:155,17,0,16 162 | BRDA:155,17,1,2 163 | BRDA:155,18,0,18 164 | BRDA:155,18,1,16 165 | BRDA:155,18,2,14 166 | BRDA:159,19,0,12 167 | BRDA:159,19,1,4 168 | BRDA:159,20,0,16 169 | BRDA:159,20,1,14 170 | BRDA:169,21,0,14 171 | BRDA:169,21,1,2 172 | BRDA:172,22,0,5 173 | BRDA:172,22,1,11 174 | BRDA:178,23,0,1 175 | BRDA:178,23,1,1 176 | BRDA:190,24,0,3 177 | BRDA:190,24,1,4 178 | BRDA:190,25,0,7 179 | BRDA:190,25,1,4 180 | BRF:55 181 | BRH:55 182 | end_of_record 183 | -------------------------------------------------------------------------------- /index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 11 | 12 | 13 |

results in console

14 |
green background: all good
15 | 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /introspected.js: -------------------------------------------------------------------------------- 1 | /*! (c) Andrea Giammarchi - @WebReflection - ISC License */ 2 | var Introspected = ((O) => {'use strict'; 3 | 4 | // commonly needed shortcuts 5 | const SProto = Introspected.prototype; 6 | const toString = O.prototype.toString; 7 | const create = O.create; 8 | const defineProperties = O.defineProperties; 9 | const emptyArray = []; 10 | const emptyString = () => ''; 11 | const getPrototypeOf = O.getPrototypeOf; 12 | const isArray = Array.isArray; 13 | const keys = O.keys; 14 | const toPrimitive = Symbol.toPrimitive; 15 | 16 | // weakly holds all known references 17 | // avoid useless Proxies when already known 18 | const known = new WeakMap(); 19 | 20 | // triggered on Array changes 21 | const ArrayHandler = [ 22 | 'copyWithin', 23 | 'fill', 24 | 'pop', 25 | 'push', 26 | 'reverse', 27 | 'shift', 28 | 'sort', 29 | 'splice', 30 | 'unshift' 31 | ].reduce((properties, method) => { 32 | const fn = emptyArray[method]; 33 | if (fn) properties[method] = { 34 | value() { 35 | const result = fn.apply(this, arguments); 36 | const length = this.length; 37 | const info = known.get(this); 38 | for (let i = 0; i < length; i++) { 39 | const value = this[i]; 40 | if (typeof value === 'object' && value != null) { 41 | setValue(info.O, this, info.$, i, value); 42 | } 43 | } 44 | info.O(emptyArray); 45 | return result; 46 | } 47 | }; 48 | return properties; 49 | }, {}); 50 | 51 | // each Introspected is proxied through this handler 52 | const IntrospectedHandler = { 53 | // notify if necessary 54 | deleteProperty(target, prop) { 55 | if (prop in target && delete target[prop] && known.has(target)) { 56 | known.get(target).O(prop); 57 | } 58 | return true; 59 | }, 60 | // return the correct prototype 61 | getPrototypeOf() { 62 | return SProto; 63 | }, 64 | // the check to do to know if a path exists 65 | has(target, prop) { 66 | return prop in target; 67 | }, 68 | // returns proxied model or create an empty one 69 | get(target, prop) { 70 | switch (true) { 71 | case prop in target: 72 | return target[prop]; 73 | case prop === toPrimitive: 74 | case prop === 'toString': 75 | return emptyString; 76 | case prop === 'toJSON': 77 | return () => target; 78 | default: 79 | const info = known.get(target); 80 | return (target[prop] = register( 81 | info.O, 82 | create(null), 83 | info.$.concat(prop) 84 | )._); 85 | } 86 | }, 87 | // triggers only on actual changes 88 | set(target, prop, value) { 89 | if ((prop in target ? target[prop] : void 0) !== value) { 90 | const info = known.get(target); 91 | setValue(info.O, target, info.$, prop, value); 92 | info.O(prop); 93 | } 94 | return true; 95 | } 96 | }; 97 | 98 | function importArray(observer, value, path) { 99 | const length = value.length; 100 | const target = Array(length); 101 | for (let i = 0; i < length; i++) { 102 | setValue(observer, target, path, i, value[i]); 103 | } 104 | return register(observer, target, path); 105 | } 106 | 107 | function importObject(observer, value, path) { 108 | const properties = keys(value); 109 | const length = properties.length; 110 | const target = create(null); 111 | for (let prop, i = 0; i < length; i++) { 112 | prop = properties[i]; 113 | setValue(observer, target, path, prop, value[prop]); 114 | } 115 | return register(observer, target, path); 116 | } 117 | 118 | function register(observer, target, paths) { 119 | const info = { 120 | _: wrap(target), 121 | $: paths, 122 | O: observer 123 | }; 124 | known.set(target, info); 125 | return info; 126 | } 127 | 128 | function setValue(observer, target, path, prop, value) { 129 | if (isArray(value)) { 130 | target[prop] = ( 131 | known.get(value) || 132 | importArray(observer, value, path.concat(prop)) 133 | )._; 134 | } else if(typeof value === 'object' && value != null) { 135 | const object = getPrototypeOf(value) === SProto ? 136 | value.toJSON() : value; 137 | target[prop] = toString.call(object) === '[object Date]' ? 138 | object : ( 139 | known.get(object) || 140 | importObject(observer, object, path.concat(prop)) 141 | )._; 142 | } else { 143 | target[prop] = value; 144 | } 145 | } 146 | 147 | function wrap(target) { 148 | return isArray(target) ? 149 | defineProperties(target, ArrayHandler) : 150 | new Proxy(target, IntrospectedHandler); 151 | } 152 | 153 | function Introspected(target, callback) { 154 | const isNull = target == null; 155 | if (isNull || ( 156 | getPrototypeOf(target) !== SProto && 157 | !known.has(target) 158 | )) { 159 | const root = isNull || !isArray(target) ? create(null) : []; 160 | const info = register( 161 | function (path) { 162 | const paths = this.$.concat(path); 163 | info.O.$.forEach(fn => fn(info._, paths)); 164 | }, 165 | root, 166 | emptyArray 167 | ); 168 | info.O.$ = new Set(); 169 | if (!isNull) keys(target).forEach( 170 | prop => setValue(info.O, root, emptyArray, prop, target[prop]) 171 | ); 172 | if (callback) { 173 | info.O.$.add(callback); 174 | callback(info._, []); 175 | } 176 | return info._; 177 | } else { 178 | if (callback) { 179 | known.get(target.toJSON()).O.$.add(callback); 180 | // don't notify other callbacks since no change was made 181 | callback(target, []); 182 | } 183 | return target; 184 | } 185 | } 186 | 187 | Introspected.observe = Introspected; 188 | 189 | Introspected.pathValue = (model, path) => 190 | path.reduce((m, p) => (m && p in m) ? m[p] : void 0, model); 191 | 192 | return Introspected; 193 | 194 | })(Object); 195 | 196 | try { module.exports = Introspected; } catch(o_O) {} 197 | -------------------------------------------------------------------------------- /min.js: -------------------------------------------------------------------------------- 1 | /*! (c) Andrea Giammarchi - @WebReflection - ISC License */ 2 | var Introspected=(t=>{"use strict";function n(t,n,o){const r=n.length,s=Array(r);for(let e=0;et(s._,n))},r,l);return s.O.$=new Set,o||d(t).forEach(n=>c(s.O,r,l,n,t[n])),n&&(s.O.$.add(n),n(s._,[])),s._}return n&&(g.get(t.toJSON()).O.$.add(n),n(t,[])),t}const i=s.prototype;const u=t.prototype.toString;const f=t.create;const a=t.defineProperties;const l=[];const h=()=>"";const p=t.getPrototypeOf;const O=Array.isArray;const d=t.keys;const y=Symbol.toPrimitive;const g=new WeakMap;const $=["copyWithin","fill","pop","push","reverse","shift","sort","splice","unshift"].reduce((t,n)=>{const o=l[n];o&&(t[n]={value(){const t=o.apply(this,arguments),n=this.length,e=g.get(this);for(let t=0;tt;default:const o=g.get(t);return t[n]=e(o.O,f(null),o.$.concat(n))._}},set(t,n,o){if((n in t?t[n]:void 0)!==o){const e=g.get(t);c(e.O,t,e.$,n,o),e.O(n)}return!0}};s.observe=s;s.pathValue=((t,n)=>n.reduce((t,n)=>t&&n in t?t[n]:void 0,t));return s})(Object);try{module.exports=Introspected}catch(t){} -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "introspected", 3 | "version": "0.2.6", 4 | "description": "Introspection for serializable arrays and JSON like objects.", 5 | "main": "./introspected.js", 6 | "unpkg": "min.js", 7 | "repository": { 8 | "type": "git", 9 | "url": "git+https://github.com/WebReflection/introspected.git" 10 | }, 11 | "keywords": [ 12 | "observe", 13 | "JSON", 14 | "object", 15 | "array", 16 | "change", 17 | "subscribe", 18 | "notify" 19 | ], 20 | "author": "Andrea Giammarchi", 21 | "license": "ISC", 22 | "bugs": { 23 | "url": "https://github.com/WebReflection/introspected/issues" 24 | }, 25 | "homepage": "https://github.com/WebReflection/introspected#readme", 26 | "scripts": { 27 | "build": "npm run minify && npm test && npm run size", 28 | "coveralls": "cat ./coverage/lcov.info | coveralls", 29 | "minify": "uglifyjs introspected.js --comments=/^!/ --compress --mangle -o min.js", 30 | "size": "cat introspected.js | wc -c;cat min.js | wc -c;gzip -c min.js | wc -c", 31 | "test": "istanbul cover test/introspected.js", 32 | "web": "$(sleep 2 && open http://0.0.0.0:7151/) & tiny-cdn run ./" 33 | }, 34 | "devDependencies": { 35 | "coveralls": "^2.13.0", 36 | "istanbul": "^0.4.5", 37 | "tiny-cdn": "^0.7.0", 38 | "tressa": "^0.3.1", 39 | "uglify-es": "^3.0.4" 40 | } 41 | } 42 | -------------------------------------------------------------------------------- /test/class-state.js: -------------------------------------------------------------------------------- 1 | "use strict"; 2 | 3 | // grab from the live test page or require in node 4 | var Introspected = Introspected || require('../introspected.js'); 5 | 6 | class Foo { 7 | constructor() { 8 | this.state = Introspected({}, console.log); 9 | this.state.items = [ 10 | {id: 1, text: "foo"}, 11 | {id: 2, text: "bar"}, 12 | {id: 3, text: "baz"} 13 | ]; 14 | } 15 | add(newItem) { 16 | this.state.items.push(newItem); 17 | } 18 | } 19 | 20 | const foo = new Foo(); 21 | foo.add({ id: 4, text: "minions" }); 22 | 23 | console.log(foo.state); 24 | 25 | -------------------------------------------------------------------------------- /test/how-to-diff.js: -------------------------------------------------------------------------------- 1 | // grab from the live test page or require in node 2 | var Introspected = Introspected || require('../introspected.js'); 3 | 4 | // any JSON compliant data structure 5 | const source = { 6 | name: 'anonymous', 7 | age: 0, 8 | address: { 9 | street: '', 10 | city: '', 11 | country: '' 12 | } 13 | }; 14 | 15 | // an Introspected version of the same data 16 | // any operation will be known, no way to hide changes! 17 | const intr = Introspected(source, (intr, path) => { 18 | 19 | // walk through the source 20 | let src = source; 21 | 22 | // ensure objects/dictionaries won't throw 23 | let hOP = {}.hasOwnProperty; 24 | 25 | // loop over the whole path 26 | for (let sub = [], i = 0; i < path.length; i++) { 27 | 28 | // grab current property, add it to sub-path 29 | let prop = (sub[i] = path[i]); 30 | 31 | // if the property is unknown 32 | if (!hOP.call(src, prop)) { 33 | 34 | // this means it was added 35 | console.log('added ' + sub.join('.')); 36 | 37 | // assign it from the intr 38 | src[prop] = intr[prop]; 39 | } 40 | // if the prop is in the current intr object 41 | else if (prop in intr) { 42 | // this means it was changed 43 | console.log('changed ' + sub.join('.')); 44 | // There is no need to check src[prop] === intr[prop] 45 | // because Introspected notifies changes *only* when 46 | // the new value is different from the previous one. 47 | } 48 | // if property is not in the intr object 49 | else { 50 | // it means it was removed 51 | delete src[prop]; 52 | console.log('removed ' + sub.join('.')); 53 | // no need to keep walking through 54 | // or accessing intr[prop] will set it again 55 | break; // or return; 56 | } 57 | src = src[prop]; 58 | intr = intr[prop]; 59 | } 60 | }); 61 | 62 | // change few fields 63 | intr.name = 'Andrea'; 64 | intr.age = 39; 65 | 66 | // change a nested group 67 | intr.address = { 68 | street: 'Wenlock', 69 | city: 'London', 70 | country: 'UK' 71 | }; 72 | 73 | // add new field 74 | intr.nationality = 'italian'; 75 | 76 | // add nested property 77 | intr.address.postcode = 'N1'; 78 | 79 | // remove a property 80 | delete intr.address.street; 81 | 82 | // no notification will happen 83 | // because it's the same value 84 | intr.age = 39; 85 | 86 | // re set removed field 87 | intr.address.street = 'Archway'; 88 | -------------------------------------------------------------------------------- /test/introspected.js: -------------------------------------------------------------------------------- 1 | var tressa = tressa || require('tressa'); 2 | 3 | const fill = Array.prototype.fill; 4 | delete Array.prototype.fill; 5 | var Introspected = Introspected || require('../introspected.js'); 6 | Array.prototype.fill = fill; 7 | 8 | tressa.title('Introspected'); 9 | 10 | tressa.assert(Object.getPrototypeOf(Introspected({})) === Introspected.prototype, 'is an Introspected object'); 11 | tressa.assert(typeof Introspected({}), 'is an object'); 12 | tressa.assert(Array.isArray(Introspected([])), 'is an array'); 13 | tressa.assert('' == Introspected({}).any, 'is an empty string'); 14 | tressa.assert(typeof Introspected({}, console.log), 'is an observable object'); 15 | tressa.assert(typeof Introspected([], console.log), 'is an observable array'); 16 | 17 | const abusedObject = (o) => { 18 | o.a.b.c = {}; 19 | o.a.b.c.d = 'd'; 20 | o.b = 123; 21 | o.c = [1, 2, 3]; 22 | o.d = [{a: 'a'}, [1, 2]]; 23 | o.d[0].b = 'b'; 24 | o.d[1].push(3); 25 | return o; 26 | }; 27 | 28 | let o = abusedObject(Introspected({})); 29 | let oStringified = '{"a":{"b":{"c":{"d":"d"}}},"b":123,"c":[1,2,3],"d":[{"a":"a","b":"b"},[1,2,3]]}'; 30 | tressa.assert(JSON.stringify(o) === oStringified, 'JSON.stringify(object)'); 31 | tressa.assert(JSON.stringify(o.toJSON()) === oStringified, 'JSON.stringify(object.toJSON())'); 32 | 33 | o = abusedObject(Introspected({gotcha: {}}, () => {})); 34 | oStringified = '{"gotcha":{},"a":{"b":{"c":{"d":"d"}}},"b":123,"c":[1,2,3],"d":[{"a":"a","b":"b"},[1,2,3]]}'; 35 | tressa.assert(JSON.stringify(o) === oStringified, 'JSON.stringify(object)'); 36 | tressa.assert(JSON.stringify(o.toJSON()) === oStringified, 'JSON.stringify(object.toJSON())'); 37 | tressa.assert(o.gotcha.a.b.c.toString() === '', 'initial objects promoted'); 38 | 39 | tressa.assert(Introspected.pathValue(o, ['d', 1, 1]) === 2, 'path can be retrieved'); 40 | tressa.assert(Introspected.pathValue(o, ['n', 'o', 'p', 'e']) === void 0, 'path can be undefined'); 41 | tressa.assert(o.d[1].push(4) === 4, 'nested arrays notify'); 42 | const d = o.d; 43 | o.d = o.d; 44 | tressa.assert(o.d === d, 'same value no effect'); 45 | tressa.assert(o.a.b.c.z + '' === '', 'non set values are empty strings'); 46 | tressa.assert(o.a.b.c.z.toString() === '', 'toString() is always usable'); 47 | tressa.assert('nope' in o === false, 'if not there, it is a false'); 48 | 49 | const empty = Introspected(); 50 | tressa.assert(JSON.stringify(empty) === '{}', 'empty Introspecteds are allowed'); 51 | tressa.assert(Introspected.observe(empty) === empty, 'if observed was a Introspected no wrap'); 52 | 53 | const abusedArray = (a) => { 54 | a.push({a: {b: {c: 'c'}}}, 1, 2, [1, 2, 3]); 55 | a[0].d = 'd'; 56 | a[3].push({a: 'a'}); 57 | return a; 58 | }; 59 | 60 | let a = abusedArray(Introspected([])); 61 | tressa.assert(JSON.stringify(a) === '[{"a":{"b":{"c":"c"}},"d":"d"},1,2,[1,2,3,{"a":"a"}]]'); 62 | 63 | o = Introspected({a: a, empty: empty}); 64 | tressa.assert(o.a === a, 'a was not wrapped'); 65 | tressa.assert(o.empty === empty, 'neither was empty'); 66 | 67 | o = Introspected({any: 123}, (root, path) => { 68 | // only on deleted paths 69 | if (path.length) { 70 | tressa.assert(path.join('') === 'any', 'deleted path'); 71 | } 72 | }); 73 | delete o.any; 74 | delete o.nope; 75 | 76 | let calls = 0; 77 | let double = Introspected(null, () => calls++); 78 | tressa.assert( 79 | double === Introspected(double, () => calls++), 80 | 'same introspected passed twice is same' 81 | ); 82 | tressa.assert(calls === 2, 'callbacks are invoked once ready'); 83 | double.any = 'value'; 84 | tressa.assert(calls === 4, 'callbacks are re-invoked on changes'); 85 | 86 | let withSameChildren = Introspected([{a: 1}, {b: 2}]); 87 | let wscA = withSameChildren[0]; 88 | let wscB = withSameChildren[1]; 89 | withSameChildren.push({c: 3}); 90 | tressa.assert( 91 | wscA === withSameChildren[0] && 92 | wscB === withSameChildren[1], 93 | 'previously mapped objects are not changed' 94 | ); 95 | tressa.assert( 96 | JSON.stringify(withSameChildren) === '[{"a":1},{"b":2},{"c":3}]', 97 | 'expected JSON with known objects' 98 | ); 99 | 100 | withSameChildren = Introspected({items: [{a: 1}, {b: 2}]}); 101 | wscA = withSameChildren.items[0]; 102 | wscB = withSameChildren.items[1]; 103 | withSameChildren.items = withSameChildren.items.concat({c: 3}); 104 | tressa.assert( 105 | wscA === withSameChildren.items[0] && 106 | wscB === withSameChildren.items[1], 107 | 'not changed even if reassigned' 108 | ); 109 | tressa.assert( 110 | JSON.stringify(withSameChildren) === '{"items":[{"a":1},{"b":2},{"c":3}]}', 111 | 'expected JSON with reassigned objects' 112 | ); 113 | 114 | tressa.assert( 115 | JSON.stringify(Introspected({d: new Date(1352505600000)})) === '{"d":"2012-11-10T00:00:00.000Z"}', 116 | 'expected JSON with a stringified date' 117 | ); 118 | 119 | tressa.end(); 120 | 121 | if (!tressa.exitCode && typeof document !== 'undefined') { 122 | document.body.style.backgroundColor = '#0FA'; 123 | } --------------------------------------------------------------------------------