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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta http-equiv="X-UA-Compatible" content="IE=edge">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>05.练习二</title>
- </head>
- <body>
- <script>
- function fun(n,o){
- console.log(o)
- return{
- fun:function(m){
- return fun(m,n)
- }
- }
- }
- // var a = fun(0); a.fun(1); a.fun(2); a.fun(3); //undefined 0 0 0
- // var b = fun(0).fun(1).fun(2).fun(3); //undefined 0 1 2
- // var c = fun(0).fun(1); c.fun(2); c.fun(3); //undefined 0 1 1
- </script>
- </body>
- </html>
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