This feature in miniExtensions form for Airtable allows you to set special requirements for certain fields. When the user tries to submit the form, this will check if the data input is valid before sending it to Airtable. A simple example, only accept phone numbers that are exactly 10 digits.

Demo for Airtable

Here’s an embedded form that checks if the number of characters in the ID is valid or not.

Direct link to the form

If you click on the sample view below, you’ll see the table that’s used for the demo above.