Unless you're somehow still rocking UI15 and do most of your development on a Commodore 64, there's a good chance that by now you're at least vaguely familiar with ServiceNow's new(-ish) Angularized end-user front-end feature: the Service Portal.
If you've tried to implement your Service catalog in the Service Portal, there's also a good chance that you've wept openly over your keyboard, trying to find an effective and non-hackey way to replicate functionality that was readily available using out-of-box APIs in the old Jelly-based CMS and catalog form. Stuff you'd think would be really basic, especially two full major releases later, it just not possible in the Service Portal. g_form APIs like getControl() and getElement() (and gel()) don't exist in Service Portal. Neither does any synchronous GlideRecord query or GlideAjax call, meaning that if you want to check something on the server in an onSubmit() script, you're out of luck.
One of the biggest annoyances resulting from this, is that there is no good way to check if a catalog item has attachments as the user submits the form. This means that you cannot make attachments required on a specific catalog item.
Oh sure, there are sort of ways to do it, such as modifying the catalog item widget just for that catalog item, so that the client controller and server script work together to check for attachments. Or you could embed the whole CMS or ITIL UI catalog item form in an iframe. Unfortunately, both of those have major downsides.
I've made this solution, in order to restore some basic functionality, with a mind toward the specific problem of checking for attachments in the Service Portal.
Here is a basic feature-list of the below functionality:
- Require attachments on submission, using sp_form.getAttachments()
- Require attachments of a specific type
- Require a specific number of attachments
- Require a specific number of attachments of various types
- Access DOM element of variable field input box and div element, using sp_form.getElement() and sp_form.getControl()
- Access variable names, sys_ids, and question text, using sp_form.variables or sp_form.getVariables().
- Iterate over each variable on the page, or otherwise retrieve variable sys_IDs, names, and question text without having prior knowledge of each within your catalog client script.
The article which explains this functionality, how it works, and how to use it, can be found here.