Javascript-9-1-OOP-5-链式调用

<html lang="en">
<head>
</head>
<body>
<div class="" style="width: 0px;height: 50px;border: 3px solid black" id="div1">
</div>
<script type="text/javascript">
    var i=0;
    function Adder(){
        Adder.prototype.styleAdder=function(divId,width) {
            document.getElementById(divId).style.width = width+"px";
            return this;//this总是指向Adder()的实例，链式调用关键点
        };
    }

    var adder=new Adder();

    adder.styleAdder("div1",50).styleAdder("div1",160).styleAdder("div1",360);
    
</script>
</body>
</html>

posted @ 2016-06-26 22:12 第二天半阅读(141) 评论(0) 收藏举报

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