# Format of Session Key Event RegEx

**URL:** <https://forum.inductiveautomation.com/t/format-of-session-key-event-regex/61086>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [June 22, 2022, 9:53pm UTC](https://forum.inductiveautomation.com/t/format-of-session-key-event-regex/61086 "2022-06-22T21:53:45Z")\
**Posts on this page:** 1\
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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [June 22, 2022, 10:02pm UTC](https://forum.inductiveautomation.com/t/format-of-session-key-event-regex/61086/2 "2022-06-22T22:02:24Z")

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The key event regex is being executed on the frontend, so start your research from “Javascript regex” or “EMCAScript regex”. For a practical starting point, I can’t recommend `regex101.com` highly enough. E.G. for your example, I’d probably start from something like this:

> **[regex101: build, test, and debug regex](https://regex101.com/r/8tjIwh/1)**
>
> Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET.

Do note that for…complicated reasons, if you want to detect an enter keypress, you need to literally capture `Enter` in your pattern. More on that here: [Perspective Key Event Regex New Line](https://forum.inductiveautomation.com/t/perspective-key-event-regex-new-line/51553)

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