BOM 解答

如何检测浏览器的类型

var ua = navigator.userAgent
var isChrome = ua.indexOf('Chrome')
console.log(isChrome)

拆解url的各部分

console.log(location.href)
console.log(location.protocol) // 'http:' 'https:'
console.log(location.pathname) // '/learn/199'
console.log(location.search)
console.log(location.hash)