一个debugger就知道了this.__proto__ === ko.constructor.prototype;this.__proto__ === AppViewModel.prototype; 有用 回复 Even_Yu 1.4k934 发布于 2018-06-22 兄弟那个函数叫自执行函数 格式为(function(){})()这是一般格式 现在有es6了 所以也可以写成: (()=>{})()箭头函数。 至于你说的有关...
我回一个没有文档时怎么判断吧,毕竟this和函数call apply bind也有关一个debugger就知道了this.__proto__ === ko.constructor.prototype;this.__proto__ === AppViewModel.prototype; 反对 回复 2019-04-08 7 回答 0 关注 793 浏览 关注 慕课专栏更多 数据结构与算法(前端版) 共24小节 492人已购买 ¥...
Sub.prototype = Object.create(Super.prototype); Sub.prototype.constructor = Sub; Sub.cid = cid++; Sub.options = mergeOptions( Super.options, extendOptions ); Sub['super'] = Super; ASSET_TYPES.forEach(function (type) { Sub[type] = Super[type]; }); if (name) { Sub.options.components...
The Prototype parameter is the name of this prototype function. Function Specifies the function being called. This can be the name of the function (preferably qualified with a module name), or any other expression that evaluates to the function address. If you need to call a constructor or ...
和Set的区别二: 对对象的引用都是弱引用 // 3.WeakSet的应用 const pWeakSet = new WeakSet() class Person { constructor() { pWeakSet.add(this) } running() { if (!pWeakSet.has(this)) { console.log("Type error: 调用的方式不对") return } console.log("running~") } } let p = new ...
实际上,Array.prototype中的函数并不限制只能对数组对象来使用。这些函数本身是通用的。比较典型的是在函数中对arguments对象的处理。arguments对象本身不是数组类型的,但是一样可以使用Array.prototype的函数来进行处理。 JSON 在ECMAScript 代码中,经常会需要与 JSON 格式的数据进行交换。JSON 也通常被用来作为客户端与...
You can also define functions using theFunctionconstructor and afunction expression. Syntax functionname([param[,param,[...,param]]]) { [statements] } name The function name. paramOptional The name of an argument to be passed to the function. Maximum number of arguments varies in different ...
TypeError: "x" is not a constructor [Translate] TypeError: "x" is not a function [Translate] TypeError: "x" is read-only [Translate] TypeError: More arguments needed [Translate] TypeError: invalid Array.prototype.sort argument [Translate] TypeError: property "x" is non-configurable and can'...
prototype setTimeout(() =>log(`zero`),1000);// 204// zerowindow[204];// undefinedclearInterval;// ƒ clearInterval() { [native code] }clearInterval.__proto__;// ƒ () { [native code] }clearInterval.__proto__.prototype;// undefinedclearInterval.__proto__.constructor;// ƒ ...
Map.prototype.forEach()andSet.prototype.forEach() Examples A typo in the function name In this case, which happens way too often, there is a typo in the method name: var x = document.getElementByID("foo"); // TypeError: document.getElementByID is not a function ...