This pull request was automatically created by Strudy upon detecting errors in Event handlers with no matching events in Compatibility Standard.

Similar errors had already been detected. Please check that the diff is correct, and that the errors have not already been reported in https://github.com/whatwg/compat.

If everything is OK, you can merge this pull request which will report the issue below to the repo, and update the underlying report file with a link to the said issue.

Title: Event handlers with no matching events in Compatibility Standard
Tracked: iOS-specific behavior description in compat
Repo: 'https://github.com/whatwg/compat'

While crawling Compatibility Standard, no matching events were found for the following event handlers:

• The interface HTMLBodyElement defines an event handler onorientationchange but no event named "orientationchange" targets it

_{Cc @dontcallmedom @tidoust}

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}