How to change the size of a formfield when it gets the focus
Changing the size of any form component on any interaction state (hover/focus/etc.) is not a good UI practice to say the least. FormField sizing option is not available out of the box as it is also not available for the other input components. What is it exactly that you want to achieve by changing the size on focus?
I am developing a scanner software with a very small screen (360 * 530). The input field should be enlarged so that the user can read the input easily