Sha256: 686a8a64bb761c72fc2c2bad015384b02cb4c1fb4bc812e9993bbde569f51fbe
Contents?: true
Size: 623 Bytes
Versions: 40
Compression:
Stored size: 623 Bytes
Contents
'use strict';
var $ = require('./$')
, isObject = require('./$.is-object')
, HAS_INSTANCE = require('./$.wks')('hasInstance')
, FunctionProto = Function.prototype;
// 19.2.3.6 Function.prototype[@@hasInstance](V)
if(!(HAS_INSTANCE in FunctionProto))$.setDesc(FunctionProto, 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 = $.getProto(O))if(this.prototype === O)return true;
return false;
}});
Version data entries
40 entries across 18 versions & 7 rubygems