.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/es.function.has-instance.js

   1 'use strict';
   2 var isCallable = require('../internals/is-callable');
   3 var isObject = require('../internals/is-object');
   4 var definePropertyModule = require('../internals/object-define-property');
   5 var getPrototypeOf = require('../internals/object-get-prototype-of');
   6 var wellKnownSymbol = require('../internals/well-known-symbol');
   7
   8 var HAS_INSTANCE = wellKnownSymbol('hasInstance');
   9 var FunctionPrototype = Function.prototype;
  10
  11 // `Function.prototype[@@hasInstance]` method
  12 // https://tc39.es/ecma262/#sec-function.prototype-@@hasinstance
  13 if (!(HAS_INSTANCE in FunctionPrototype)) {
  14   definePropertyModule.f(FunctionPrototype, HAS_INSTANCE, { value: function (O) {
  15     if (!isCallable(this) || !isObject(O)) return false;
  16     var P = this.prototype;
  17     if (!isObject(P)) return O instanceof this;
  18     // for environment w/o native `@@hasInstance` logic enough `instanceof`, but add this:
  19     while (O = getPrototypeOf(O)) if (P === O) return true;
  20     return false;
  21   } });
  22 }