Github https://github.com/epoberezkin/fast-deep-equal
https://github.com/epoberezkin/fast-deep-equal
image.png
https://bundlephobia.com/package/fast-deep-equal@3.1.3
lodash.isEqual
image.png

最快的对象深度相等对比，支持

  • Date
  • RegExp
  • ES6 Map、Set
  • 数组
  • 对象 ```jsx yarn add fast-deep-equal

import equal from ‘fast-deep-equal’;

const equal = require(‘fast-deep-equal/react’); const equal = require(‘fast-deep-equal/es6/react’);

  3. <a name="sGLwQ"></a>
  4. ## fastEqual
  5. ```javascript
  6. module.exports = function equal(a, b) {
  7.   if (a === b) return true;
  9.   if (a && b && typeof a == 'object' && typeof b == 'object') {
  10.     if (a.constructor !== b.constructor) return false;
  12.     var length, i, keys;
  13.     if (Array.isArray(a)) {
  14.       length = a.length;
  15.       if (length != b.length) return false;
  16.       for (i = length; i-- !== 0;)
  17.         if (!equal(a[i], b[i])) return false;
  18.       return true;
  19.     }
  22.     if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
  23.     if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
  24.     if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
  26.     keys = Object.keys(a);
  27.     length = keys.length;
  28.     if (length !== Object.keys(b).length) return false;
  30.     for (i = length; i-- !== 0;)
  31.       if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
  33.     for (i = length; i-- !== 0;) {
  34.       var key = keys[i];
  36.       if (!equal(a[key], b[key])) return false;
  37.     }
  39.     return true;
  40.   }
  42.   // true if both NaN, false otherwise
  43.   return a!==a && b!==b;
  44. };

es6

  1. var envHasBigInt64Array = typeof BigInt64Array !== 'undefined';
  3. module.exports = function equal(a, b) {
  4.   if (a === b) return true;
  6.   if (a && b && typeof a == 'object' && typeof b == 'object') {
  7.     if (a.constructor !== b.constructor) return false;
  9.     var length, i, keys;
  10.     if (Array.isArray(a)) {
  11.       length = a.length;
  12.       if (length != b.length) return false;
  13.       for (i = length; i-- !== 0;)
  14.         if (!equal(a[i], b[i])) return false;
  15.       return true;
  16.     }
  19.     if ((a instanceof Map) && (b instanceof Map)) {
  20.       if (a.size !== b.size) return false;
  21.       for (i of a.entries())
  22.         if (!b.has(i[0])) return false;
  23.       for (i of a.entries())
  24.         if (!equal(i[1], b.get(i[0]))) return false;
  25.       return true;
  26.     }
  28.     if ((a instanceof Set) && (b instanceof Set)) {
  29.       if (a.size !== b.size) return false;
  30.       for (i of a.entries())
  31.         if (!b.has(i[0])) return false;
  32.       return true;
  33.     }
  35.     if (ArrayBuffer.isView(a) && ArrayBuffer.isView(b)) {
  36.       length = a.length;
  37.       if (length != b.length) return false;
  38.       for (i = length; i-- !== 0;)
  39.         if (a[i] !== b[i]) return false;
  40.       return true;
  41.     }
  44.     if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
  45.     if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
  46.     if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
  48.     keys = Object.keys(a);
  49.     length = keys.length;
  50.     if (length !== Object.keys(b).length) return false;
  52.     for (i = length; i-- !== 0;)
  53.       if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
  55.     for (i = length; i-- !== 0;) {
  56.       var key = keys[i];
  58.       if (!equal(a[key], b[key])) return false;
  59.     }
  61.     return true;
  62.   }
  64.   // true if both NaN, false otherwise
  65.   return a!==a && b!==b;
  66. };