Migrate from WixFormSubmitEvent to WixFormsV2

As of April 2025, WixFormSubmitEvent is deprecated and any new forms created will only work with WixFormsV2. You can access the functionality of WixFormSubmitEvent using onSubmit() in WixFormsV2.

Old forms will only work with the old APIs: WixForms, WixFormSubmitEvent, WixFormSubmittedErrorEvent, and WixFormSubmittedEvent. You can see which forms are old forms and which are new forms by looking at the forms and submissions page in a site dashboard, where there's a tab for each.