JS get page URL information

Here we give an example of a URL and then get its various components:
Http://i.cnblogs.com/EditPosts.aspx?opt=1

Window.location.href (Sets or gets the entire URL as a string)

var test = window.location.href;alert(test);//  返回：http://i.cnblogs.com/EditPosts.aspx?opt=1

Window.location.protocol (set or get the protocol portion of the URL)

var test = window.location.protocol;alert(test);//返回：http:

Window.location.host (Sets or gets the host portion of the URL)

var test = window.location.host;alert(test);//返回：i.cnblogs.com

Window.location.port (Sets or gets the port number associated with the URL)

var test = window.location.port;alert(test);//返回：空字符(如果采用默认的80端口 (update:即使添加了:80)，那么返回值并不是默认的80而是空字符)

Window.location.pathname (Sets or gets the path portion of the URL (that is, the file address))

var test = window.location.pathname;alert(test);//返回：/EditPosts.aspx

Window.location.search (Sets or gets the portion of the HREF attribute that follows the question mark)

var test = window.location.search;alert(test);//返回：?opt=1（PS：获得查询（参数）部分，除了给动态语言赋值以外，我们同样可以给静态页面，并使用javascript来获得相信应的参数值。）

Window.location.hash (Sets or gets the fragment behind the pound sign "#" in the href attribute)

var test = window.location.hash;alert(test);//返回：空字符(因为url中没有)

JS gets the parameter value in the URL * Regular method

function getQueryString(name) {          var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');          var r = window.location.search.substr(1).match(reg);          if (r != null) {             return unescape(r[2]);          }          return null;  }// 这样调用：alert(GetQueryString("参数名1"));alert(GetQueryString("参数名2"));alert(GetQueryString("参数名3"));

Split Splitting method

function GetRequest() {         var url = location.search; //获取url中"?"符后的字串         var theRequest = new Object();         if (url.indexOf("?") != -1) {                 var str = url.substr(1);                 strs = str.split("&");              for(var i = 0; i < strs.length; i ++) {                      theRequest[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);               }         }     return theRequest; }var Request = new Object();Request = GetRequest();<br>// var id=Request["id"]; // var 参数1,参数2,参数3,参数N;// 参数1 = Request['参数1'];// 参数2 = Request['参数2'];// 参数3 = Request['参数3'];// 参数N = Request['参数N'];

Specify a Fetch

For example a url:http://i.cnblogs.com/?j=js, we want the value of the parameter J, which can be called by the following function.

function GetQueryString(name) {          var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");          var r = window.location.search.substr(1).match(reg); //获取url中"?"符后的字符串并正则匹配         var context = "";      if (r != null)      context = r[2];     reg = null;     r = null;     return context == null || context == "" || context == "undefined" ? "" : context;  }alert(GetQueryString("j"));

How to get a single parameter

function GetRequest() {         var url = location.search; //获取url中"?"符后的字串         if (url.indexOf("?") != -1) {? //判断是否有参数                  var str = url.substr(1); //从第一个字符开始 因为第0个是?号 获取所有除问号的所有符串                  strs = str.split("=");? //用等号进行分隔 （因为知道只有一个参数                                           //所以直接用等号进分隔 如果有多个参数 要用&号分隔 再用等号进行分隔）                  alert(strs[1]);???? //直接弹出第一个参数 （如果有多个参数 还要进行循环的）         }  }

Reprinted from: https://www.jianshu.com/p/073f79c5e438

JS get page URL information