Js闭包练习2020031801 

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <title></title>
        <script type="text/javascript" src="js/jquery-1.12.4.js" ></script>
    </head>
    <body>

        <script type="text/javascript">
            
            var add = (function(){
                var count = 0;
                return function(){
                    return count += 1;
                };
            })();
            
            var inner = function(count){
                return count += 1;
            };
            
            function test1(){
                return inner(0);
            }
            
            var add2 = (function(){
                var count = 0;
                return function(){
                    count = inner(count);
                    return count;
                };
            })();
            
//            alert(test1());
//            alert(inner(0));
            var n = 0;
            for(var i = 0; i < 5; i++){
                n = add2();
            }
            alert(n);
            
            /*var n = add();
            n = 0;
            for(var i = 0; i < 5; i++){
                n = add();
            }
            alert(n);*/
            
        </script>

    </body>
</html>

 

posted @ 2020-03-18 16:08  ラピスラズリ(Dawn)  阅读(118)  评论(0)    收藏  举报