25 lines
675 B
TypeScript
25 lines
675 B
TypeScript
import isObjectLike from './is-object-like';
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import isType from './is-type';
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const isPlainObject = function(value: any): value is object {
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/**
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* isObjectLike(new Foo) => false
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* isObjectLike([1, 2, 3]) => false
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* isObjectLike({ x: 0, y: 0 }) => true
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* isObjectLike(Object.create(null)) => true
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*/
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if (!isObjectLike(value) || !isType(value, 'Object')) {
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return false;
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}
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if (Object.getPrototypeOf(value) === null) {
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return true;
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}
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let proto = value;
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while (Object.getPrototypeOf(proto) !== null) {
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proto = Object.getPrototypeOf(proto);
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}
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return Object.getPrototypeOf(value) === proto;
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};
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export default isPlainObject;
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