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Last change
on this file since ceaed42 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
1002 bytes
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| 1 | /* eslint-disable no-proto -- safe */
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| 2 | var anObject = require('../internals/an-object');
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| 3 | var aPossiblePrototype = require('../internals/a-possible-prototype');
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| 4 |
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| 5 | // `Object.setPrototypeOf` method
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| 6 | // https://tc39.es/ecma262/#sec-object.setprototypeof
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| 7 | // Works with __proto__ only. Old v8 can't work with null proto objects.
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| 8 | // eslint-disable-next-line es/no-object-setprototypeof -- safe
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| 9 | module.exports = Object.setPrototypeOf || ('__proto__' in {} ? function () {
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| 10 | var CORRECT_SETTER = false;
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| 11 | var test = {};
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| 12 | var setter;
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| 13 | try {
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| 14 | // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
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| 15 | setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
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| 16 | setter.call(test, []);
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| 17 | CORRECT_SETTER = test instanceof Array;
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| 18 | } catch (error) { /* empty */ }
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| 19 | return function setPrototypeOf(O, proto) {
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| 20 | anObject(O);
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| 21 | aPossiblePrototype(proto);
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| 22 | if (CORRECT_SETTER) setter.call(O, proto);
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| 23 | else O.__proto__ = proto;
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| 24 | return O;
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| 25 | };
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| 26 | }() : undefined);
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