Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

"SyntaxError: invalid regexp group" for "REST - Params" example in Firefox

See original GitHub issue

Describe the bug

SyntaxError: invalid regexp group

Environment

msw: 0.19.3
nodejs: irrelevant
npm: irrelevant

Firefox 77.0.1 (64-bit) MacOS

To Reproduce

$ yarn test:focused test/rest-api/params.mocks.ts

Open the printed URL in Firefox.
Perform a fetch('https://api.github.com/users/:username/messages/abc-123') request from your browser’s console.

Expected behavior

The regular expression pattern string provided to the pathToRegExp function is a valid regular expression.

Issue Analytics

State:
Created 3 years ago
Comments:5 (4 by maintainers)

Top GitHub Comments

1reaction

LeBenLeBencommented, Jun 17, 2020

I ran the test you mentioned in Firefox Developer Edition 78 and it pass 👍

0reactions

kettanaitocommented, Jul 16, 2020

There is no plan to support this at the moment. The recommendation is to wait until the next version of Firefox is released, or use a different browser with a named capture groups in RegExp support.

Top Results From Across the Web

Firefox gives SyntaxError: invalid regexp group - Stack Overflow

For me, it was because I thought I'd be clever and try to used named capture groups in my regex... Firefox punished me....

SyntaxError: invalid regular expression flag "x" - MDN Web Docs

The JavaScript exception "invalid regular expression flag" occurs when the flags in a regular expression contain any flag that is not one of:...

Invalid regexp literal shows wrong line and column number

SyntaxError : invalid regexp group shown with incorrect line number ... For example, just include the regex line/column in the error message itself?...

"use strict" not allowed in function with non-simple parameters ...

A "use strict" directive is not allowed at the top of such functions per the ECMAScript specification. Examples. Function statement. In this case,...

Groups and backreferences - JavaScript - MDN Web Docs

Groups group multiple patterns as a whole, and capturing groups provide extra submatch information when using a regular expression pattern ...