<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JavaScript：演示typeof的功能和用法</title>
</head>
<body>
<script type="text/javascript">
var x, y, z = 1; //对比：var x=5, y=3, z = 1;
document.write(x);
document.write("<br/>");
document.write(y);
document.write("<br/>");
document.write(z);
document.write("<br/>");
document.write("================>" + "<br/>");
var a, b = 2;
var name = "rose";
var obj = new Date();
document.write(typeof(a) + "<br/>");
document.write(typeof(b) + "<br/>");
document.write(typeof (name) + "<br/>");
document.write(typeof (obj) + "<br/>");
document.write(typeof (null) + "<br/>");
document.write(typeof (true) + "<br/>");
</script>
</body>
</html>JavaScript：演示typeof的功能和用法
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转载自blog.csdn.net/u013101178/article/details/81127067
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