zoukankan      html  css  js  c++  java
  • 6 ways to define javascript function

    There are six ways/contexts in which to create functions:

    1) Standard declarative notation (most familiar to people with C background)

    function foo(){}

    All the rest are function expressions:

    2) As a method of an object literal

    var obj ={
        foo:function(){}};

    3) As a method of an instantiated object (created each time new is exectued)

    varObj=function(){this.foo =function(){};};

    4) As a method of a prototype (created only once, regardless of how many times new is executed)

    varObj=function(){};Obj.prototype.foo =function(){};

    5) As an anonymous function with a reference (same effect as #1) *

    var foo =function(){};

    6) As an immediately executed anonymous function (completely anonymous)

    (function(){})();

    * When I look at this statement, I consider the result. As such, I don't really consider these as anonymous, because a reference is immediately created to the function and is therefore no longer anonymous. But it's all the same to most people.

    see also :

    http://stackoverflow.com/questions/1866084/javascript-function-declaration

    http://shichuan.github.com/javascript-patterns/

  • 相关阅读:
    设置网络
    href
    webpack学习
    那些个像素
    jquery Id选择器与document.getElementByIdy区别
    又一个很垃圾的设计
    卸载QQ,360,迅雷,搜狗
    CheckFail设计很垃圾
    js写法【2】
    require的定义看不懂【2】
  • 原文地址:https://www.cnblogs.com/malaikuangren/p/2956318.html
Copyright © 2011-2022 走看看