Catalog Client Script not setting the reference variable using URL parameter (value keeps reverting)

[SwethanaB]

Hi team,

I’m working on a Catalog Client Script (onLoad) where I need to populate a reference variable (configuration_item) based on a URL parameter ci=1.

https://<instance>.service-now.com/<catalog_page>?id=sc_cat_item&sys_id=(sys id of CI)&ci=1

OnLoad script:

function onLoad() {

    var ci = g_form.getParameter('ci');

    g_form.clearValue('configuration_item');

    if (ci === '1') {

        g_form.setValue('configuration_item', 'sys_id');

    }

}

The variable still loads the previously used value, even after clearValue().

[vaishali231]

hey @SwethanaB 
In Service Catalog, g_form.getParameter() does not reliably work for URL parameters. Also, reference variables may retain the last selected value due to cart/session caching, which is why clearValue() alone does not resolve the issue.

Instead, use g_request.getParameter() and pass a separate parameter for the CI sys_id (do not reuse sys_id, as that belongs to the catalog item).

URL format:

https://<instance>.service-now.com/<catalog_page>?id=sc_cat_item&sys_id=<catalog_item_sys_id>&ci=1&ci_sys_id=<ci_sys_id>

Catalog Client Script (onLoad):

function onLoad() {

// Always clear first to avoid cached value
g_form.setValue('configuration_item', '');

var ciFlag = g_request.getParameter('ci');
var ciSysId = g_request.getParameter('ci_sys_id');

if (ciFlag == '1' && ciSysId) {

// Small delay ensures it runs after form rendering
setTimeout(function() {
g_form.setValue('configuration_item', ciSysId);
}, 100);
}
}

*********************************************************************************************************************************

If this response helps, please mark it as Accept as Solution and Helpful.

Doing so helps others in the community and encourages me to keep contributing.

Regards

Vaishali Singh

[SwethanaB]

Hello Vaishali,

Thanks for the response!

I have tried the solution you provided but still I am getting the below error and it is taking the previously used data.

There is a JavaScript error in your browser console

Thanks!

[Ankur Bawiskar]

@SwethanaB 

that's not going to work

This will work in portal

function onLoad() {

    var url = top.location.href;
    var sysId = new URLSearchParams(url).get("sys_id");
    alert(sysId);
    g_form.setValue('configuration_item', sysId); // check variable name is correct
}

💡 If my response helped, please mark it as correct ✅ and close the thread 🔒— this helps future readers find the solution faster! 🙏