projects / standards & open source
SpiderMonkey - TC39 Joint Iteration
Two patches landed in Firefox 133 - the nightly-gated preference controlling the TC39 Joint Iteration proposal, and the placeholder implementation for Iterator.zip.
What this is
Contributed to Firefox’s JavaScript engine through Outreachy, mentored by Dan Minor at Mozilla.
I landed the nightly-only preference that gates the TC39 Joint Iteration
proposal (javascript.options.experimental.joint_iteration) - the switch the rest of the proposal
builds on, and a blocker for two dependent bugs - and the placeholder implementation for
Iterator.zip : an #ifdef NIGHTLY_BUILD guard in Iterator.js, registered as a static
method and conditionally removed when the pref is off.
Both patches shipped in Firefox 133.
- Bug 1918735 - add the Joint Iteration pref
- Bug 1923146 - placeholder implementation for
Iterator.zip
Important lessons on working on a massive codebase with thousands of contributors.