ConfigCat email contains targeting rule with + sign throws invalid regular expression SyntaxError
Shows how to fix configCat email contains targeting rule with + sign throws invalid regular expression SyntaxError. Use it when you hit this exact problem. Skip it when your error message or symptom looks different.
TL;DR
For "invalid regular expression": upgrade the configcat-js (or your platform SDK) to a release newer than February 2022 and targeting rules with + in the value evaluate correctly. The team confirmed the root cause and shipped a patched SDK version shortly after the report.
invalid regular expressionSteps
- This was a ConfigCat SDK bug in how targeting-rule values were escaped when building the comparison regex. The team confirmed the root cause and shipped a patched SDK version shortly after the report. Upgrade the configcat-js (or your platform SDK) to a release newer than February 2022 and targeting rules with + in the value evaluate correctly.
When to use
You are seeing this: getAllValuesAsync throws an "invalid regular expression" SyntaxError when an "email contains" targeting rule has a value containing a + sign, for example [EMAIL]. Use this skill when you run into "ConfigCat email contains targeting rule with + sign throws invalid regular expression SyntaxError".
When not to use
If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.
Versions
No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.
Why this happens
The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.