URLSearchParams and custom Service Catalog URL parameters with sysparm_ prefix

[GLewis5]

I have seen a lot posts regarding the use of URLSearchParams in Catalog Client Scripts to extract custom parameter values from a URL. In all the examples, the names of the custom parameters start with "sysparm_".  As best I can tell, this prefix is not required when introducing a custom URL parameter. Why does everyone use a "sysparm_" prefix?

[Community Alums · Accepted solution]

Hello @GLewis5 

Exactly, one doesn't need to use sysparm. PFB below example - 

    //Use the 'getParameterValue' function below to get the parameter values from the URL   
var par = getParameterValue('name of paramter in URL');

function getParameterValue(name) {
    name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
    var regexS = "[\\?&]" + name + "=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(top.location);  
    if (results == null) {
        return "";
    } else {
        return unescape(results[1]);
    }
}