var isCallable = require('../internals/is-callable');
|
var isObject = require('../internals/is-object');
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var setPrototypeOf = require('../internals/object-set-prototype-of');
|
|
// makes subclassing work correct for wrapped built-ins
|
module.exports = function ($this, dummy, Wrapper) {
|
var NewTarget, NewTargetPrototype;
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if (
|
// it can work only with native `setPrototypeOf`
|
setPrototypeOf &&
|
// we haven't completely correct pre-ES6 way for getting `new.target`, so use this
|
isCallable(NewTarget = dummy.constructor) &&
|
NewTarget !== Wrapper &&
|
isObject(NewTargetPrototype = NewTarget.prototype) &&
|
NewTargetPrototype !== Wrapper.prototype
|
) setPrototypeOf($this, NewTargetPrototype);
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return $this;
|
};
|
