javascript复习：JS-Web-API-BOM

BOM (browser object model的缩写，简称浏览器对象模型)

题目：

• 如何识别浏览器的类型
• 分析拆解url各个部分

知识点

• navigator

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

• screen

  console.log(screen.width)    // 2560
  console.log(screen.height)    // 1440

• location

  console.log(location.href);   // https://www.baidu.com/?tn=98050039_dg&ch=1#/name/lxl
  console.log(location.protocol);  // https:
  console.log(location.pathname); // /writer
  console.log(location.search); //  ?tn=98050039_dg&ch=1
  console.log(location.hash);   // #/name/lxl
  console.log(location.host);   // "www.baidu.com"