也就是懒加载。页面拖到新地方就加载。html
把多个参数的函数返回成单1参数的函数
编程
链式编程函数
<script> function classA(){ this.lian = ""; this.zui = ""; this.tui = ""; } classA.prototype = { setLian:function(){ this.lian = "脸"; return this; }, setZui:function(){ this.zui = "嘴"; return this; }, setTui:function(){ this.tui = "腿"; return this; } }; var person = new classA(); person.setLian().setZui().setTui(); alert(person); </script>