Obtain URL parameters using Javascript

In the Asp.net background code, it is very easy to obtain the URL parameter. You can use Request. QueryString ["paramName. Sometimes I want to get URL parameters in Javascript, but I did not find them in the built-in Javascript method, so I wrote a method myself:Copy to ClipboardReference: [www.bkjia.com] function getQueryString (paramName ){

ParamName = paramName. replace (/[\ []/, "\ ["). replace (/[\]/, "\]"). toLowerCase ();

Var reg = "[\\? &] "+ ParamName +" = ([^ & #] *) ";

Var regex = new RegExp (reg );

Var regResults = regex.exe c (window. location. href. toLowerCase ());

If (regResults = null) return "";

Else return regResults [1];

} Here, a regular expression is used to search for matched parameter values in the current url (window. location. href) based on the parameter name paramName.