javascript/jquery method to obtain address bar url parameters_javascript skills

Using jquery to obtain url and using jquery to obtain url parameters are operations we often use

1. It is very simple to get the url with jquery. The code is as follows:

Copy the code The code is as follows:

window.location.href;

In fact, it only uses the basic window object of javascript and does not use the knowledge of jquery

2. Getting url parameters with jquery is more complicated and requires the use of regular expressions, so it is important to learn javascript regular expressions

First, let’s look at how to get a certain parameter in the url simply through javascript

Copy the code The code is as follows:

function getUrlParam(name)
{
var reg = new RegExp("(^|&)" name "=([^&]*)(&|$)") ; //Construct a regular expression object containing target parameters
var r = window.location.search.substr(1).match(reg); //Match target parameters
if (r!=null) return unescape(r[2]); return null; //Return parameter value
}

You can get the parameter value by passing the parameter name in the url through this function, for example, the url is
http://www.xxx.loc/admin/write-post.php?cid=79
If we want to get the value of cid, we can write like this:

Copy code The code is as follows:

getUrlParam('cid');

Understand how javascript gets url parameters , we can use this method to extend a method for jquery to obtain url parameters through jquery, the following code

The code extends a getUrlParam() method for jquery

Copy the code The code is as follows:

(function($){
$.getUrlParam
= function(name)
{
var reg
= new RegExp("(^|&)"
name "= ([^&]*)(&|$)");
var r
= window.location.search.substr(1).match(reg);
if (r!=null) return unescape(r[2]); return null;
}
})(jQuery);

After extending this method for jquery, we can obtain it through the following method The value of a certain parameter

Copy code The code is as follows:

$.getUrlParam('cid ');