8000 Add a section on "Risky changes" to the working mode by domenic · Pull Request #253 · whatwg/sg · GitHub
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Per code review
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domenic committed Sep 26, 2025
commit a3e09209dbfa1027561d083a4265e57a682012ba
2 changes: 1 addition & 1 deletion Working Mode.md
Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,7 @@ To balance between having the standard reflect agreed-upon changes, and avoiding

EXAMPLE: [Escape "<" and ">" when serializing attribute values](https://github.com/whatwg/html/pull/6362) was merged once it became clear that all implementations were moving toward shipping, even before the change had reached any implementation's stable channel.

* If multiple implementers are supportive of the change, but only a single implementation is taking the lead by shipping it, then it's best to wait until there's a deployed implementation that's seen significant user testing before merging into the standard.
* If multiple implementers are supportive of the change, but only a single implementation is taking the lead by shipping it, then it's best to wait until there's at least one deployed implementation that's seen significant user testing before merging into the standard.

EXAMPLE: [Removing mutation events](https://github.com/whatwg/html/pull/10573) had support from all implementations, but was not merged until Chromium had shipped the behavior to its stable channel users [for a month](https://github.com/whatwg/dom/issues/305#issuecomment-2302407051). Even then, we kept the tracking issue open until [Chromium removed some mechanisms](https://github.com/whatwg/dom/issues/305#issuecomment-2779845660) that allowed sites to opt back in to mutation events.

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