一、JS Web API-BOM

BOM(Browser Object Model)

• 如何识别浏览器的类型
• 分解拆解url各个部分

1. navigator history screen location

• navigator

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

• screen

    console.log(screen.width)
    console.log(screen.height)

• location

    console.log(location.href) //网址
    console.log(location.protocol) //协议
    console.log(location.host) //域名
    console.log(location.search) //取网址中的参数，一般是？后面的符号

• history

    history.back() //后退
    history.forward() //前进