38 lines
768 B
JavaScript
38 lines
768 B
JavaScript
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// original sourc
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// https://github.com/rackt/react-redux/blob/master/src/utils/shallowEqual.js
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// MIT license
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export default function shallowEqual(objA, objB) {
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if (objA === objB) {
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return true;
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}
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if (
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typeof objA !== 'object' ||
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objA === null ||
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typeof objB !== 'object' ||
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objB === null
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) {
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return false;
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}
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var keysA = Object.keys(objA);
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var keysB = Object.keys(objB);
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if (keysA.length !== keysB.length) {
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return false;
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}
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// Test for A's keys different from B.
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var bHasOwnProperty = Object.prototype.hasOwnProperty.bind(objB);
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for (var i = 0; i < keysA.length; i++) {
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if (
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!bHasOwnProperty(keysA[i]) ||
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objA[keysA[i]] !== objB[keysA[i]]
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) {
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return false;
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}
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}
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return true;
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}
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