I think @rniwa's point is that it sucks if either (a) the component self-determines that it wants to be auto-focused, or (b) the component has to invent its own attribute that means "autofocus" and then respond to that to put a real autofocus on its internal input.

Separately, if a component has a particular input among its shadow children that it wants to receive focus by default, it has to wire all that by itself.

Part of the reasoning for custom elements is making them, as much as possible/feasible, indistinguishable from normal elements. Making it hard to properly handle focus, and impossible to use the autofocus attribute on, isn't following this goal.

So anyway, @rniwa’s proposal, as far as I can tell, is that components using delegatesFocus (which makes them "atomic" to the light dom's focus tree, more or less) should be able to use autofocus internally to designate which of its focusable elements receive the automatic focus (rather than, as currently specified, it always being the first focusable element). Then autofocus on the component itself will also work, by automatically focusing the component, and then delegating that to the designated shadow element.

Uh oh!

Shadow DOM and autofocus="" #833

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