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Hide a disabled fab button on a compact window, as M3 removes a FAB

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`<x-button fab>` is an extended FAB below `medium` and a filled button
from there, but a disabled one was still drawn as the FAB below
`medium`: the compact FAB's rule set no state of its own, so the button
stood greyed out and fixed over the content. M3 never disables a FAB:
"if its action is unavailable, remove the FAB entirely".

A `fab` given `disabled` (a `<button disabled>`, or a link's
`aria-disabled="true"`) now renders `data-md-unavailable`, and
button.css draws it `display: none` below `medium`, which also takes it
out of the accessibility tree and the Tab order; from `medium` it is
the disabled filled button it was. The mark comes from the prop, not
from `:disabled`, because a `spinner` puts `disabled` on its button
while the action runs, and that FAB is busy rather than unavailable:
hidden, it would vanish instead of showing its loading indicator. The
docblocks and the skill's button table say so.

A browser test renders an enabled fab with a slow spinner action, a
disabled one and a disabled link on a 393px window: the disabled two
are not rendered, the busy one stays on screen with its indicator, and
at 600px both disabled ones are the disabled button again; it fails
without the change in Chrome, Firefox and Safari (and in Chrome with
`:disabled` alone as the condition, on the busy FAB). A feature test
reads the mark and the rule.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Andreas Reinhold / reini
2026-09-17 07:00:40 +02:00
co-authored by Claude Opus 5
parent cf63f11bfb
commit 6d4487feb3
6 changed files with 104 additions and 3 deletions
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resources/boost/skills/livewire-material-development/SKILL.md
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@@ -263,7 +263,7 @@ Label button, icon button, toggle and responsive FAB in one component.
| `link`, `external`, `no-wire-navigate` | | renders `<a>`, with `wire:navigate` unless external |
| `spinner` | | `true` shows the loading indicator while its `wire:click` runs; a string names the action |
| `tooltip`, `tooltip-left`, `tooltip-right`, `tooltip-bottom` | | plain tooltip; also the icon button's accessible name |
| `disabled`, `type`, `responsive`, `fab` | | `responsive` hides the label below `expanded`; `fab` is an extended FAB on a compact window (below `medium`), a filled button from there |
| `disabled`, `type`, `responsive`, `fab` | | `responsive` hides the label below `expanded`; `fab` is an extended FAB on a compact window (below `medium`), a filled button from there; a `disabled` fab is not drawn below `medium` — M3 removes a FAB whose action is unavailable — and is the disabled button from there (a `spinner` disabling it while its action runs leaves it on screen) |
```blade
<x-button label="Create link" icon="link" variant="filled" size="md" wire:click="create" spinner />