How to prevent submission finish time is before start time

[Robert_Petitto]

If you’re using a “custom form”, you can add this condition to your button block to prevent users from submitting.

However, if you are using a native forum or edit screen, the only way to do this would be to add a hint text that displays when end date is before start date and then use this CSS trick to prevent form submission when that hint text is visible:

Hacking a Form Submit Button using CSS

Hey fellow Gliders! I recently came across this post by @Himaladin, and I was so impressed that I had to create a video that walked through this hack step by step—it’s incredibly clever! Using a visibility condition, a custom class, and the :has() CSS pseudo-class, you can control whether or not users can submit a form regardless of required fields! Yes, you’ll need to be on the Business plan in order to use this hack because it requires the use of CSS, but it’s a great way to control …