leak.html

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script>
/*     document.write('object between js and dom');
        function f(ele){
            this.eleref=ele;
            ele.prop=this;
        }
        function leak(){
            for(var i=0;i<1000;i++){
                new f(document.getElementById('a1'))
            }

        }
        window.onload=function(){
            var obj=document.getElementById('a1');
            obj.onclick=function(){
                alert('leak');
            }
            obj.str=new Array(1000).join(new Array(2000).join("==="))
        }*/
var x={
    length:0,
    add:function(num){
       Array.prototype.push.call(this,num)
    },
    addArray:function(ary){
        Array.prototype.push.apply(this,ary)
    }
}
        x.add(1);x.add(2);x.add(3);
x.addArray([4,5,6])
        console.log(x)
    </script>
</head>
<body>
<!--<div id="a1">qqqq</div>-->
</body>
</html>