JS转换为布尔值为false的五个值 

<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Document</title>
</head>
<script>

console.log(Boolean(""));
console.log(Boolean(0));
console.log(Boolean(null));
console.log(Boolean(undefined));
console.log(Boolean(NaN));
</script>
<body>
<h1>标题</h1>
<p id="info"></p>
</body>
</html>

 

posted @ 2020-12-29 16:42  ITWebGirl  阅读(187)  评论(0)    收藏  举报