I want to limit the number of characters allowed in one of the questions in my ODK Xform. The question is about the user's comment so I need the field to accept any number of characters from 0 to 100 including line breaks. Otherwise it must show the proper alert.
<bind nodeset="/widgets/Comment" type="string" constraint="regex(.,'^.{0,100}$')" />
I have the above code, but it does not allow me to have line breaks, I appreciate your help.
Use the s option to make . match any character, including newlines:
<bind nodeset="/widgets/Comment" type="string" constraint="regex(.,'^(?s).{0,100}$')" />