Masking custom field input

Is there a way to assign an input mask for a custom field?

For example, I want a field that is always letter-letter-(automated slash)-number-number-number

like AB/998

but I want user to only introduce AB and then 998, and of course when in the number area it will only be sensible to number entry.

Hi,

By default we can't create a mask, but it's possible to achieve that by editing the view "product / show_block_custom_item".
Add a if condition to apply the changes only on the desired custom field, and add some javascript to apply a mask.

It require some php and javascript knowledges.