js implements dynamically obtaining parameters after the address bar

This article mainly shares with you js to dynamically obtain the parameters after the address bar. I hope it can help everyone.

Requirement: js dynamically obtains the parameters behind the address bar

js code:

1. alert(GetQueryString("code"))  
   //获取地址栏后面的参数  
   function GetQueryString(name){  
        var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");  
        var r = window.location.search.substr(1).match(reg);  
        if(r!=null)return  decodeURI(r[2]); return null;  
    }

##When the url The address is http://114.215.84.2/debo/test.html?code=123

Calling the function will directly return 123.

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