Attempting to use the optional chaining operator (introduced 2020) in #7474 raised an error when running `npm run build`: <img width="1038" height="434" alt="Image" src="https://github.com/user-attachments/assets/d2bffad7-42f8-4995-a6cb-39340a542fd6" /> This seems to be because `falafel` (used in one of the preprocessing steps) depends on an older version of the [`acorn`](https://www.npmjs.com/package/acorn) parser (7.4.1, released 5 years ago). Adding an override to `package.json` to bump the `acorn` version allows the build to complete successfully. ```json "overrides": { "falafel": { "acorn": "^8.1.1" } ```