Question Detecting button press (not click) from code

Essentially, I'm working for mobile (touchscreen) and want to use DoTween for the UI animations.

The issue is while I can detect OnClick(), I want to animate when eg a button has been pressed (finger has touched screen but not yet left) - so they can tell something has happened before they release their finger.

But I can't for the life of me find a way to do this! I've tried seeing if I can access the button trigger that is sent to the animator, and various other ideas but all to no avail. Would love some help!

 

not sure if it works exactly like that with touch but GetMouseButtonDown triggers in the moment you click/ push down. i didn't develop for mobile in a long time but it could be that depending on the platform mouse button functions just work for touch too.
if you want to control it with the button i think its OnPointerDown, but check out the docs for buttons.