.gitignore added
[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / core-js / modules / es.function.has-instance.js
1 'use strict';
2 var isObject = require('../internals/is-object');
3 var definePropertyModule = require('../internals/object-define-property');
4 var getPrototypeOf = require('../internals/object-get-prototype-of');
5 var wellKnownSymbol = require('../internals/well-known-symbol');
6
7 var HAS_INSTANCE = wellKnownSymbol('hasInstance');
8 var FunctionPrototype = Function.prototype;
9
10 // `Function.prototype[@@hasInstance]` method
11 // https://tc39.es/ecma262/#sec-function.prototype-@@hasinstance
12 if (!(HAS_INSTANCE in FunctionPrototype)) {
13   definePropertyModule.f(FunctionPrototype, HAS_INSTANCE, { value: function (O) {
14     if (typeof this != 'function' || !isObject(O)) return false;
15     if (!isObject(this.prototype)) return O instanceof this;
16     // for environment w/o native `@@hasInstance` logic enough `instanceof`, but add this:
17     while (O = getPrototypeOf(O)) if (this.prototype === O) return true;
18     return false;
19   } });
20 }