Hi
I used a call to this input like that :
<txp:com_connect_text class="form-control" name="nom" label="nom" placeholder="Nom du 1er Responsable " required break="" pattern="^[ A-Za-z0-9_@./,#&+-]$"/>
The browswer dont comlained about the pattern but when submitted i got errors from the plugin :
Tag error: <txp:com_connect_text class="form-control" name="raison" label="raison" placeholder="Raison Sociale " required break="" pattern="[ A-Za-z0-9_@./,#&+-]"/> -> Warning: preg_match(): Unknown modifier ',' while parsing form inscription on page default
I tested the pattern on this live preg_match : https://www.phpliveregex.com/#tab-preg-match and there is no complain.