Updated our WebIDL page to include this new information: https://developer.mozilla.org/en-US/docs/MDN/Contribute/Howto/Write_an_API_reference/Information_contained_in_a_WebIDL_file#Mixins
Let me know if you'd rather see something different here. Chris Mills MDN content lead & writers' team manager Mozilla Developer Network <https://developer.mozilla.org/en-US/> @chrisdavidmills <https://twitter.com/chrisdavidmills> On Tue, Sep 24, 2019 at 6:20 PM Boris Zbarsky <bzbar...@mit.edu> wrote: > The way mixins are done in IDL has changed syntax somewhat. Instead of > having a [NoInterfaceObject] interface and an "implements" statement, > the new setup looks like this: > > interface A {}; > > interface mixin B { > void somethingMixedIn(); > } > > A includes B; > > In-tree IDL has been updated to the new syntax. Support for the old > syntax has not been removed yet, but will be as soon as that patch is > reviewed; please do not add new IDL using "implements". > > The new setup is a little less featureful: mixins have no inheritance > and cannot include other mixins. They _do_ support partials, so you can > do: > > interface A {}; > interface mixin B {}; > partial interface mixin B { > void somethingMixedIn(); > }; > A includes B; > > A mixin and its partials have to in the same .webidl file, just like our > existing rules for interfaces. This is not enforced yet, but will be > soon. Similarly, the "A includes B" statement must be in the same > .webidl file as the definition of interface A. This part _is_ enforced. > > Mixins have somewhat restricted syntax compared to interfaces (e.g. do > not allow mixing in constructors, getter/setter operations, iterable > declarations, etc). This should not be a problem in practice, and > certainly wasn't for anything we had in-tree. > > -Boris > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
