In the built-in JS files, `var` was adopted instead of `let` / `const` by 219251@main[1]. However, in the functions in `IteratorHelpers.js` added by 250474@main[2], `let` is used. [1]: https://commits.webkit.org/219251@main [2]: https://commits.webkit.org/250474@main
Pull request: https://github.com/WebKit/WebKit/pull/28840
Committed 279180@main (d7bdc4ae0598): <https://commits.webkit.org/279180@main> Reviewed commits have been landed. Closing PR #28840 and removing active labels.
<rdar://problem/128587748>