<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>javascript高级语法8-链式调用</title>
</head>
<body>
<div id="box"></div>
<script type="text/javascript">
function demo1(){
(function(){
//创建一个cat类
function Cat(name){
this.name = name;
this.run = function(){
document.write(this.name+" start run"+"<br/>")
}
this.stopRun = function(){
document.write(this.name+" stop run"+"<br/>")
}
this.sing = function(){
document.write(this.name+" start singing"+"<br/>")
}
this.stopSing = function(){
document.write(this.name+" stop sing"+"<br/>")
}
}
//测试
var c = new Cat("maomi");
c.run();
c.sing();
c.stopRun();
c.stopSing();
})()} function demo2(){
(function(){
//创建一个cat类
function Cat(name){
this.name = name;
this.run = function(){
document.write(this.name+" start run"+"<br/>")
return this;
}
this.stopRun = function(){
document.write(this.name+" stop run"+"<br/>")
return this;
}
this.sing = function(){
document.write(this.name+" start singing"+"<br/>")
return this;
}
this.stopSing = function(){
document.write(this.name+" stop sing"+"<br/>")
return this;
}
}
//测试
var c = new Cat("lili");
c.run().sing().stopRun().stopSing(); })()
} //为了给类（Function类）扩展函数，定义一个它的静态函数
Function.prototype.method = function(name,fn){
this.prototype[name] = fn;
return this;
};
(function(){
//模仿jquery链式调用
function _$(els){};
//准备方法
_$.onready = function(fn){
//按需求把对象（_$）注册到window上
window.$ = function(){
return new _$(arguments);
}
fn();
}
//链式的对象增加jquery库提供的操作函数。
_$.method("addEvent",function(type,fn){
fn();
}).method("getEvent",function(fn,e){
fn();
}).method("addClass",function(className,fn){
fn();
}).method("removeClass",function(className,fn){
fn();
}).method("replaceClass",function(oldClass,newClass){
fn();
}).method("getStyle",function(el,fn){
fn();
}).method("setStyle",function(el,fn){
fn();
}).method("load",function(url,fn){
fn();
}) //开始使用
_$.onready(function(){
$("#box").addEvent("click",function(){
alert("click event")
})
})
})()
</script>
</body>
</html>