User input fields

Hello all,

I would like to know how to purposefully make a field loose focus after a certain amount of time? Or simply once the user clicks out of the input field. Because once I’ve entered text into a field but I no longer want to fill the form out and delete that text, then continue to click done on the keyboard (iPhone 7). When I start to scroll though my page again, it just refocuses the input and it’s highly annoying.

What is the way to go about doing this, if it’s at all possible?