Force caps as the user inputs value into a custom attribute text field

Summary

How can we change the entered to all caps automatically as the user inputs the value

Content

Hello,

We have a requirement to change the text entered in a custom attribute text field to all caps.
Its a Contact custom attribute field.

Using a mask will restrict the user from entering small letters, but the requirement is to automatically change the text to all caps.

Is there a way we can achieve this?

Thanks,

Viji