The example of this article analyzes the usage of the function name.length attribute in Javascript. Share it with everyone for your reference, the details are as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
//函数名.length表示的是函数定义的参数的个数,这里sayHi函数定义了一个参数a,所以输出1
//和arguments.length不一样，arguments.length指的是外部调用时传入的形参的个数
window.onload = function () {
sayHi();
}
function sayHi(a) {
alert(sayHi.length); //打印出1
}
alert(sayHi.length); //也是打印出1
</script>
</head>
<body>
</body>
</html>I hope this article will be helpful to everyone’s JavaScript programming design.
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