I'm trying to create a mask in an HTML form field for functional registration, though I'm not getting it. I'm using the pattern tag in HTML5. In input I put the tag this way, pattern="[c]{1}+[0-9]{6}+$" , and would expect the first character to always be a "c" followed by 6 numeric characters ("C999999"). I have read several articles and saw some more standardized models working, what am I doing wrong in this example?
Creating validation with the pattern
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asked by anonymous 25.11.2017 / 14:40
1 answer
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Well in this case it happens because% of your pattern is lowercase and what you want to validate is c uppercase.
For this you need a capture group containing the letter C insensitive case followed by exact 6 numbers.
It would look like this:
c
25.11.2017 / 15:53