To make “Subcategory” choices dependent on the selection of “Category” in ServiceNow catalog items, you should implement a dynamic dependent selection using Catalog Client Scripts or reference qualifiers on your variable set.
Firstly start with Reference Qualifier Setup
Set a reference qualifier for the Subcategory variable based on the selected value in the Category variable.
For Select Box variables, use the Catalog Client Script approach since reference qualifiers are primarily for reference fields.
Then Use Catalog Client Script
Create an ‘onChange’ Catalog Client Script on the ‘Category’ variable. Create a new client script of type "OnChange"
if (isLoading || newValue == '') {
g_form.clearOptions('subcategory');
return;
}
var subcategoryMap = {
'Other': ['System Functionality', 'Creation of local Job Self-Family'],
'Edit Existing Localized Content': ['System Functionality'],
'Creation of localized Job Profile': ['Job Family', 'Role Profile'],
// Add all your mappings here
};
g_form.clearOptions('subcategory');
var subs = subcategoryMap[newValue];
if (subs && subs.length) {
for (var i = 0; i < subs.length; i++) {
g_form.addOption('subcategory', subs[i], subs[i]);
}
}
}
Adjust the `subcategoryMap` definition to match your values as seen in your screenshots.
By following the above steps, the subcategory list will automatically update based on the selected category, as requested.
This is the dynamic solution which will work in your scenario there can be other ways as well to achieve this but this will definitely work in your case. Let me know if you want to try other ways to achieve it or let me know if you want more information on this.
If my answer has helped with your question, please mark my answer as the accepted solution and give a thumbs up.
Best regards,
Madhan
