Lookbehind patterns fail with a parse error
Lookbehind assertions fail with a parse error even though JavaScript supports them.
Tier I · Proven The best-established problems.
6 public reports · first reported 4 February 2016 · last reported 27 April 2025
What's going wrong
Users of the regex diagram tool find that lookbehind assertions, both positive and negative, fail with an expected-character error.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 6 reports are about, and how many came each month.
- Related problems.
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