+++ /dev/null
-'use strict';
-var isObject = require('../internals/is-object');
-var definePropertyModule = require('../internals/object-define-property');
-var getPrototypeOf = require('../internals/object-get-prototype-of');
-var wellKnownSymbol = require('../internals/well-known-symbol');
-
-var HAS_INSTANCE = wellKnownSymbol('hasInstance');
-var FunctionPrototype = Function.prototype;
-
-// `Function.prototype[@@hasInstance]` method
-// https://tc39.github.io/ecma262/#sec-function.prototype-@@hasinstance
-if (!(HAS_INSTANCE in FunctionPrototype)) {
- definePropertyModule.f(FunctionPrototype, HAS_INSTANCE, { value: function (O) {
- if (typeof this != 'function' || !isObject(O)) return false;
- if (!isObject(this.prototype)) return O instanceof this;
- // for environment w/o native `@@hasInstance` logic enough `instanceof`, but add this:
- while (O = getPrototypeOf(O)) if (this.prototype === O) return true;
- return false;
- } });
-}