Microsoft/TypeScript
Auf GitHub ansehenTS1508: Unexpected '?'. Did you mean to escape it with backslash? shouldn't report even with `v` flag
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#62.707 geöffnet am 2. Nov. 2025
BugDomain: ParserHelp Wanted
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Beschreibung
🔎 Search Terms
TS1508, "Did you mean to escape it with backslash?"
🕗 Version & Regression Information
- This changed between versions ______ and _______
- This changed in https://github.com/microsoft/TypeScript/pull/55600 which introduced regular expression syntax checking
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________
- I was unable to test this on prior versions because _______
⏯ Playground Link
https://www.typescriptlang.org/play/?target=11#code/PQbQ-AZAusBuBQQ
💻 Code
/[?&]/v
🙁 Actual behavior
The error "TS1508: Unexpected '?'. Did you mean to escape it with backslash?" is given.
🙂 Expected behavior
No error because ? doesn't need to be escaped in a character class even with a v flag.
Additional information about the issue
Other characters like { do need escaping with the v flag, but ? gets no runtime errors, so I don't see why this has to err now.