Spot the Bug: Regex Edition

# Spot the bug - #188: Textbox **URL:** \ **Category:** web dev\ **Created:** [November 6, 2026, 4:05pm UTC](https://forum.kirupa.com/t/spot-the-bug-188-textbox/683958 "2026-11-06T16:05:09Z")\ **Posts on this page:** 1\ **Page:** 1

**Author:** ![sarah\_connor](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/sarah_connor/32/31258_2.png) [@sarah\_connor](https://forum.kirupa.com/u/sarah_connor)\ **Post date:** [November 6, 2026, 4:05pm UTC](https://forum.kirupa.com/t/spot-the-bug-188-textbox/683958/1 "2026-11-06T16:05:09Z")

Tiny regex quest hides a subtle flaw. ```html Spot the Bug: Regex Edition

Enter a simple alphanumeric string (letters or digits only):

``` Reply with what is broken and how you would fix it.