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Integrate with `ElementInternals` #1121

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seanpdoyle wants to merge 1 commit into basecamp:main from seanpdoyle:element-internals

Commits on Jan 16, 2024

Integrate with ElementInternals

Closes [#1023][]

Replace the requirement for an `<input type="hidden">` element with
direct `<form>` integration through built-in support for
[ElementInternals][].

According to the [Form-associated custom elements][] section of [More
capable form controls][], various behaviors that the `<trix-editor>`
element was recreating are provided out of the box.

For example, the `<input type="hidden">`-`[input]` attribute pairing can
be achieved through [ElementInternals.setFormValue][]. Similarly, the
`<label>` element support can be achieved through
[ElementInternals.labels][].

[#1023]: #1023
[ElementInternals]: https://developer.mozilla.org/en-US/docs/Web/API/ElementInternals
[Form-associated custom elements]: https://web.dev/articles/more-capable-form-controls#form-associated_custom_elements
[More capable form controls]: https://web.dev/articles/more-capable-form-controls
[ElementInternals.setFormValue]: https://developer.mozilla.org/en-US/docs/Web/API/ElementInternals/setFormValue
[ElementInternals.labels]: https://developer.mozilla.org/en-US/docs/Web/API/ElementInternals/labels

seanpdoyle committed Jan 16, 2024