If you don't pick data like a date for pickup in the user form and submit anyways then the page allows you to progress and receive an error. There are tools in HTML5 that could prevent users from continuing to the shopping view without leaving out information.
alexjamesmalcolm
commented
6 years ago 
If you don't pick data like a date for pickup in the user form and submit anyways then the page allows you to progress and receive an error. There are tools in HTML5 that could prevent users from continuing to the shopping view without leaving out information.