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packages/shared/shallowEqual.js
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Jan Kassens
Flow upgrade to 0.205.1 (#26796)
09 май 2023, 17:45
Не верифицирован
09 май 2023, 17:45
fda1f0b
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/** * Copyright (c) Meta Platforms, Inc. and affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. * * @flow */ import is from './objectIs'; import hasOwnProperty from './hasOwnProperty'; /** * Performs equality by iterating through keys on an object and returning false * when any key has values which are not strictly equal between the arguments. * Returns true when the values of all keys are strictly equal. */ function shallowEqual(objA: mixed, objB: mixed): boolean { if (is(objA, objB)) { return true; } if ( typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null ) { return false; } const keysA = Object.keys(objA); const keysB = Object.keys(objB); if (keysA.length !== keysB.length) { return false; } // Test for A's keys different from B. for (let i = 0; i < keysA.length; i++) { const currentKey = keysA[i]; if ( !hasOwnProperty.call(objB, currentKey) || // $FlowFixMe[incompatible-use] lost refinement of `objB` !is(objA[currentKey], objB[currentKey]) ) { return false; } } return true; } export default shallowEqual;