在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(cainiaoplay.com)</title>
</head>
<body>

<h2>字符串转换为函数</h2>

<p id="demo"></p>

<script>

var text = '{ "name":"Codexy", "alexa":"function () {return 10000;}", "site":"www.cainiaoplay.com"}';
var obj = JSON.parse(text);
obj.alexa = eval("(" + obj.alexa + ")");

document.getElementById("demo").innerHTML = obj.name + " Alexa 排名：" + obj.alexa(); 

</script>

</body>
</html>

源代码

动行结果