RE2JS regular expression engine FAQs
What happens if I don’t update my regex by April 21, 2025?
After this date, entries containing unsupported regex validation rules will fail to publish. A warning message will be displayed in the web app prompting you to update your regular expressions.
Will my existing regular expressions still work?
Not all regex patterns will work as-is. RE2JS enforces stricter validation, which means you must modify patterns that rely on unsupported features. For more information, see the Regular Expression (Regex) page.
How will I know if my regex needs changes?
Warning messages and alerts will be displayed on the affected fields and content types in the web app prompting you to update your regular expressions.
What should I do if my regex no longer works after migration?
Test your regex in the RE2JS Playground.
Check for unsupported features and modify accordingly.
Contact Customer Support or your CSM for help.
I received an error about an “unsupported regex feature.” What does this mean?
This means your regex includes a feature that RE2JS does not support (e.g., backreferences, lookaheads). You will need to modify the regex to comply with RE2JS rules.
Can I still use regex validation for form inputs and data processing?
Yes. However, you may need to modify your existing regex patterns. If you use password validation, email matching, or other regex-based input validation, please ensure they are RE2JS-compatible.