22 lines
906 B
JavaScript
Executable file
22 lines
906 B
JavaScript
Executable file
var global = require('../internals/global');
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var hasOwn = require('../internals/has-own-property');
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var isCallable = require('../internals/is-callable');
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var toObject = require('../internals/to-object');
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var sharedKey = require('../internals/shared-key');
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var CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');
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var IE_PROTO = sharedKey('IE_PROTO');
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var Object = global.Object;
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var ObjectPrototype = Object.prototype;
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// `Object.getPrototypeOf` method
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// https://tc39.es/ecma262/#sec-object.getprototypeof
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module.exports = CORRECT_PROTOTYPE_GETTER ? Object.getPrototypeOf : function (O) {
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var object = toObject(O);
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if (hasOwn(object, IE_PROTO)) return object[IE_PROTO];
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var constructor = object.constructor;
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if (isCallable(constructor) && object instanceof constructor) {
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return constructor.prototype;
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} return object instanceof Object ? ObjectPrototype : null;
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};
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