You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
21 lines
905 B
21 lines
905 B
'use strict';
|
|
var isCallable = require('../internals/is-callable');
|
|
var isObject = require('../internals/is-object');
|
|
var definePropertyModule = require('../internals/object-define-property');
|
|
var isPrototypeOf = require('../internals/object-is-prototype-of');
|
|
var wellKnownSymbol = require('../internals/well-known-symbol');
|
|
var makeBuiltIn = require('../internals/make-built-in');
|
|
|
|
var HAS_INSTANCE = wellKnownSymbol('hasInstance');
|
|
var FunctionPrototype = Function.prototype;
|
|
|
|
// `Function.prototype[@@hasInstance]` method
|
|
// https://tc39.es/ecma262/#sec-function.prototype-@@hasinstance
|
|
if (!(HAS_INSTANCE in FunctionPrototype)) {
|
|
definePropertyModule.f(FunctionPrototype, HAS_INSTANCE, { value: makeBuiltIn(function (O) {
|
|
if (!isCallable(this) || !isObject(O)) return false;
|
|
var P = this.prototype;
|
|
return isObject(P) ? isPrototypeOf(P, O) : O instanceof this;
|
|
}, HAS_INSTANCE) });
|
|
}
|