When Gravity Forms is in No-Conflict mode, along with enqueuing JS using wp_enqueue_script() you also need to specifically register scripts so they are loaded on Gravity Forms pages.
We've ensured any enqueued scripts with a handle beginning with "gfpdf_js" are automatically registered, but you may need to register other WordPress scripts. This filter allows you to easily register a WordPress JS handler so it's included on No Conflict Gravity Form pages.
$items | array
: The list of JS handlers currently being registered with Gravity Form's No-Conflict mode.
: By default any JS handler beginning with "gfpdf_js", and already enqueued, are registered on Gravity Forms pages. The following WordPress scripts are also registered on Gravity PDF pages: