1 如何检测浏览器的类型？

    var ua = navigator.userAgent;
    var isChrome = ua.indexOf('Chrome');
    console.log('is Chrome?', isChrome > 0, navigator.userAgent);
    console.log('电脑屏幕大小：', screen.width, screen.height)

2 如何拆解URL的各个部分？

// location
    console.log(location.href);                 // 完整的url地址，http://localhost:8080/JS-Professional/begin/02-%E5%9F%BA%E7%A1%80%E8%BF%9B%E9%98%B6/01-%E4%BB%8E%E5%9F%BA%E7%A1%80%E5%88%B0%E8%BF%9B%E9%98%B6.html?_ijt=i8ctmkc87dvh03tdaf51rn5v1i
    console.log(location.protocol)              // http/https
    console.log(location.host, location.hostname)                  // www.52tech.tech
    console.log(location.pathname);             // host之后的全部内容，JS-Professional/begin/02-%E5%9F%BA%E7%A1%80%E8%BF%9B%E9%98%B6/01-%E4%BB%8E%E5%9F%BA%E7%A1%80%E5%88%B0%E8%BF%9B%E9%98%B6.html
    console.log(location.search);               // search就是？之后的全部内容，?_ijt=i8ctmkc87dvh03tdaf51rn5v1i（包括？）
    console.log(location.hash);                 // #后面的内容（包括#）