Textfield in upper or lower case

In most applications you would like to keep some text fields in upper case. For example: car license plates, ID numbers, passport numbers etc.

We can achieve this with a simple javascript in the custom attributes of the field.

onKeyUp="this.value=this.value.toUpperCase();"

Or similarly for lower case:

 onKeyUp="this.value=this.value.toLowerCase();"

See example here.

EDIT 24-apr-2018:
Alternatively we could also use CSS to display textfields in upper or lower case with:

 u-textUpper u-textLower

Be advised though, this only changes the display.