Created
April 8, 2022 19:17
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JavaScript to compare two things as equal (client-side)
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| 'use strict' | |
| export function deepEqual (object1, object2) { | |
| // check for falsy values | |
| if (!object1 && !object2) return true | |
| if (!object1 && object2) return false | |
| if (object1 && !object2) return false | |
| const keys1 = Object.keys(object1) | |
| const keys2 = Object.keys(object2) | |
| if (keys1.length !== keys2.length) { | |
| return false | |
| } | |
| for (const key of keys1) { | |
| const val1 = object1[ key ] | |
| const val2 = object2[ key ] | |
| const areObjects = isObject(val1) && isObject(val2) | |
| if ( | |
| (areObjects && !deepEqual(val1, val2)) | |
| || (!areObjects && val1 !== val2) | |
| ) { | |
| return false | |
| } | |
| } | |
| return true | |
| } | |
| function isObject (object) { | |
| return object != null && typeof object === 'object' | |
| } | |
| export default deepEqual |
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