如何在JavaScript中判断变量是否为整数,如果不是,如何抛出alert ?我试过了,但没用:
<html>
<head>
<script type="text/javascript">
var data = 22;
alert(NaN(data));
</script>
</head>
</html>
如何在JavaScript中判断变量是否为整数,如果不是,如何抛出alert ?我试过了,但没用:
<html>
<head>
<script type="text/javascript">
var data = 22;
alert(NaN(data));
</script>
</head>
</html>
使用===运算符(strict equality),如下所示:,
if (data === parseInt(data, 10))
alert("data is integer")
else
alert("data is not an integer")