<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>BOM常用的和知识点</title>
</head>
<body>
<script type="text/javascript">
//navigator (浏览器)
//screen (屏幕)
//location (地址)
//history (历史)
//navigator
var ua = navigator.userAgent;
console.log(ua);
var isChrome = ua.indexOf("Chrome");
console.log(isChrome);
//screen
console.log(screen.width);
console.log(screen.height);
//location 拆解url各部分
console.log(location.href);//整个URL
console.log(location.protocol);//协议 http: https
console.log(location.host);//域名
console.log(location.pathname);//路径
console.log(location.search);//参数
console.log(location.hash);//#号和#号后面
//history
history.back();//后退
history.forward();//前进
</script>
</body>
</html>