39 lines
877 B
JavaScript
39 lines
877 B
JavaScript
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'use strict';
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function valueOf(obj) {
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return obj.valueOf ? obj.valueOf() : Object.prototype.valueOf.call(obj);
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}
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function valueEqual(a, b) {
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// Test for strict equality first.
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if (a === b) return true;
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// Otherwise, if either of them == null they are not equal.
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if (a == null || b == null) return false;
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if (Array.isArray(a)) {
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return (
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Array.isArray(b) &&
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a.length === b.length &&
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a.every(function(item, index) {
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return valueEqual(item, b[index]);
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})
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);
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}
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if (typeof a === 'object' || typeof b === 'object') {
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var aValue = valueOf(a);
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var bValue = valueOf(b);
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if (aValue !== a || bValue !== b) return valueEqual(aValue, bValue);
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return Object.keys(Object.assign({}, a, b)).every(function(key) {
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return valueEqual(a[key], b[key]);
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});
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}
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return false;
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}
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module.exports = valueEqual;
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