<!DOCTYPE?html>
<html>
<head>
<meta?charset="{CHARSET}">
<title></title>
</head>
<body>
<script>
function?f(){
var?num=1;
return?function(){
num++;
alert(num);
};
};
var?result1=f();
result1();
result1();
var?result2=f();
result2();
result2();
</script>
</body>
</html>
為什么result1和result2彈出的結果是一樣的？
慕數(shù)據(jù)5775487
2017-01-15 18:14:28
