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js基础
1.变量引用
var a = [1,2,3]
若 b = a
修改b中的元素会导致a的元素发生变化
若 b = a
b = [4,5,6]
修改b中的元素不会修改到a
2.闭包，上下文
闭包：函数套函数
上下文：call,apply,bind
3.原型，原型链
jQuery.fn = jQuery.prototype
jQuery.fn.show = function(){}
jQuery('#abc').show()
4.对象
对象克隆
var a = new Obj()
var b = new a.constructor()
for(attr in a){
if(a.hasOwnProperty(p)){
b[attr] = a[attr]
}
}
5.类，继承
function man(){
person.call(this)
this.sex = 'man'
}
man.prototype = new person()
man.prototype.constructor = man
6.轮子
arale - class ,widget,
7.模块化
seajs
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