34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
export function shallowEqual(objA, objB, compare, compareContext) {
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let compareResult = compare ? compare.call(compareContext, objA, objB) : void 0;
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if (compareResult !== void 0) {
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return !!compareResult;
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}
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if (objA === objB) {
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return true;
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}
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if (typeof objA !== 'object' || !objA || typeof objB !== 'object' || !objB) {
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return false;
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}
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const keysA = Object.keys(objA);
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const 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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const bHasOwnProperty = Object.prototype.hasOwnProperty.bind(objB);
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// Test for A's keys different from B.
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for(let idx = 0; idx < keysA.length; idx++){
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const key = keysA[idx];
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if (!bHasOwnProperty(key)) {
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return false;
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}
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const valueA = objA[key];
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const valueB = objB[key];
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compareResult = compare ? compare.call(compareContext, valueA, valueB, key) : void 0;
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if (compareResult === false || compareResult === void 0 && valueA !== valueB) {
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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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//# sourceMappingURL=index.js.map
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