This concept is used to propagate events into the source's tree under certain circumstances.

Seewhatwg/dom#1377 for the definition of the concept and how it is used.

Note: I'm not sure how best to go about this, but this is my best guess.ToggleEvent already has asource, so it might be enough for it to implicitly be thesource used in algorithms, the wayrelatedTarget is. However,SubmitEvent has an analogous but differently named member,submitter, which I think should be used the same way.

• At least two implementers are interested (and none opposed):
  • …
  • …
• Tests are written and can be reviewed and commented upon at:
  • …
• Implementation bugs are filed:
  • Chromium: …
  • Gecko: …
  • WebKit: …
  • Deno (only for timers, structured clone, base64 utils, channel messaging, module resolution, web workers, and web storage): …
  • Node.js (only for timers, structured clone, base64 utils, channel messaging, and module resolution): …
• CorrespondingHTML AAM &ARIA in HTML issues & PRs:
• MDN issue is filed: …
• The top of this comment includes aclear commit message to use.

(SeeWHATWG Working Mode: Changes for more details.)

/form-control-infrastructure.html (diff )
/infrastructure.html (diff )
/interaction.html (diff )