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livewire-material/resources/views/components/tab.blade.php
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Andreas Reinhold / reiniandClaude Opus 5 94e2a900d2 Render a tab panel's id and its hidden state on the server
Every panel was visible until Alpine booted — four role="tabpanel" regions at
once for a screen reader, and aria-controls pointing at ids that did not exist
yet. The panel now carries its id, its aria-labelledby and, unless it is the
chosen one, display:none from the server. A slot renders before the component
around it, so the panel reads <x-tabs>'s attributes off the component stack and
repeats its id and initial-tab lines; both files say so.
Plan: docs/plans/material-3-alignment.md, step 14 (navigation N-05).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
2026-09-14 06:01:37 +02:00

45 lines
2.2 KiB
PHP

{{-- One tab's panel, inside `<x-tabs>`, which draws the bar from its own `tabs` list. Shown while
its `name` is the chosen one; every panel is rendered, so switching never waits on the server.
`class` lands on the panel (it has `pt-6` above its content by default).
The id and the `hidden` panels come from the server, not from Alpine: until Alpine boots, every
panel would otherwise be on screen at once — four `role="tabpanel"` regions for a screen reader
to walk — and the tab buttons' `aria-controls` would point at nothing. `<x-tabs>` renders this
slot before its own view, so it cannot hand the panel anything; the panel reads the attributes
written on `<x-tabs>` off the component stack (Blade's `@aware` mechanism) and repeats the two
lines tabs.blade.php runs on them. The two must agree, so change them together. --}}
@props([
'name',
])
@php
$aware = fn (string $key, $default = null) => $__env->getConsumableComponentData($key, $default);
$tabs = $aware('tabs', []);
// `wire:model` is a key, not a prop, and its modifiers are part of the key: the spellings that
// make sense on a tab set. An exotic one only means the panel falls back to the first tab.
$model = collect(['wire:model', 'wire:model.live', 'wire:model.blur', 'wire:model.change', 'wire:model.lazy'])
->map(fn (string $key) => $aware($key))
->first(fn ($value): bool => filled($value));
$tabsId = $aware('id') ?? 'tabs-'.substr(md5($model.'|'.implode('|', array_column($tabs, 'name'))), 0, 8);
$initial = $aware('selected') ?? (collect($tabs)->first(fn (array $tab): bool => ! ($tab['disabled'] ?? false))['name'] ?? null);
if ($model !== null && ($component = \Livewire\Livewire::current()) !== null && filled(data_get($component, $model))) {
$initial = data_get($component, $model);
}
@endphp
<div
x-show="selected === @js($name)"
role="tabpanel"
id="{{ $tabsId }}-{{ $name }}-panel"
aria-labelledby="{{ $tabsId }}-{{ $name }}"
tabindex="0"
@if ((string) $name !== (string) $initial) style="display: none" @endif
{{ $attributes->class(['pt-6 outline-none']) }}
>
{{ $slot }}
</div>