Hover Sidebar

• What it looks like
• Requirements
• How it works
• Installation
• Configuration
• What you get
• Gotchas worth knowing before you debug them
• Try it without an app
• Local development against a real app
• Testing
• Relationship to other packages
• Upstream references
• Changelog
• Credits
• License

An icon-only sidebar for Filament panels that expands on hover, flies out over the content instead of pushing it, and can be pinned open as a normal drawer.

Filament v5 already gives you the collapsed rail (sidebarCollapsibleOnDesktop()) and group flyout menus. What it has no API for is hover-to-expand, and its desktop sidebar is lg:sticky — in the flex flow — so expanding it reflows the page. This plugin adds the first and fixes the second.

#What it looks like

Collapsed, the sidebar is an icon rail and the table gets the width:

Hover it and the full navigation flies out over the table. Owner, Stage, Value and Close date sit at exactly the same pixels in both shots — the sidebar moved, the content did not. That is the whole contract. (The second shot is dark mode; the flyout inherits the panel background, so themes need no configuration.)

#Requirements

Verified against filament/filament v5.7.7 with Livewire v4 on Laravel 13 and PHP 8.4; CI covers every Laravel and PHP combination above at both --prefer-lowest and --prefer-stable.

On Filament v4. The package runs there unmodified — the whole API surface and every CSS hook it depends on exist in v4.12.7, and its sidebar stylesheet differs from v5's only in using a --topbar-height variable where v5 hardcodes 4rem. Support is still declared as ^5.0 deliberately: this plugin overrides core sidebar internals, so it carries real version risk, and promising two majors doubles the surface that has to be re-checked on every Filament release. If you need v4, widening the constraint locally is likely to work, but it is untested territory as far as this package is concerned.

#How it works

The plugin owns a pinned flag (an Alpine $persist key — the user's actual preference) and treats core's $store.sidebar.isOpen as pure presentation, driving it from pinned || peeking.

That one flag is what makes this small. Core gates labels, badges, the logo, global search, group headers, item tooltips (via x-effect), aria-expanded, and whether a nav group renders as an inline list or a dropdown — all on isOpen. Flipping it makes the whole sidebar internally consistent for free, with no forked Blade view.

• Unpinned — the sidebar goes position: fixed and .fi-main-ctn takes a padding-inline-start equal to the collapsed width. Hover widens the sidebar over the content. Nothing reflows.
• Pinned — the plugin gets out of the way entirely and core's sticky push behaviour stands.

Ships as plain CSS and plain JS. No npm, no Tailwind build, no custom theme required.

#Installation

composer require vitisstudio/filament-hover-sidebar
php artisan filament:assets

Register the plugin on a panel:

use VitisStudio\FilamentHoverSidebar\HoverSidebarPlugin;

return $panel
    ->sidebarWidth('17rem')
    ->collapsedSidebarWidth('4.5rem')
    ->plugin(
        HoverSidebarPlugin::make()
            ->openDelay(90)
            ->closeDelay(180)
    );

sidebarCollapsibleOnDesktop() is applied by the plugin's register(), so you do not need it.

The CSS and JS are registered panel-agnostically and load everywhere, but nothing activates until a panel adds the plugin — the JS no-ops without its config object, and the CSS is gated on an fhs body class the plugin adds.

#Configuration

Both icons accept anything Filament's icon components take — a Blade Icons name, a BackedEnum, or an Htmlable. Pass null to restore the packaged default:

use Filament\Support\Icons\Heroicon;

HoverSidebarPlugin::make()
    ->unpinnedIcon(Heroicon::OutlinedBars3)
    ->pinnedIcon('heroicon-s-x-mark')

The defaults come from Phosphor via codeat3/blade-phosphor-icons, which the package requires — no Heroicon set ships a sidebar panel glyph. Override both if you would rather not render Phosphor at all.

The flyout inherits the panel's own background, so custom themes and dark mode are picked up with no configuration. Override only if you want the flyout to differ from the panel:

:root {
    --fhs-sidebar-bg: #ffffff; /* defaults to the panel background */
    --fhs-duration: 150ms;
}

Translations for the pin button live in filament-hover-sidebar::hover-sidebar and can be published:

php artisan vendor:publish --tag="filament-hover-sidebar-translations"

#What you get

• Hover-to-expand — the unpinned rail widens after openDelay, collapses after closeDelay. Keyboard focusin/focusout expand it too, so tabbing into the nav works.
• Tap-to-expand — a press on the collapsed rail expands it and goes nowhere: with no labels showing, a press on an icon is a request to see the nav, not to follow it. The next press navigates. On touch, a press anywhere else collapses the rail again. Both delays are skipped, since a press is deliberate in a way a drifting pointer is not. Keyboard activation is exempt — focusin has already expanded the rail by then.
• Flyout — the expanded sidebar is position: fixed over the content; .fi-main-ctn keeps its collapsed-width padding, so nothing reflows and no table re-lays-out mid-hover.
• Drawer — the pin button switches to core's sticky push behaviour, persisted per browser.
• Group flyout menus — free from core: give a NavigationGroup an ->icon() and its items appear in a dropdown beside the collapsed rail.

#Gotchas worth knowing before you debug them

• Collapsed width. Core's intrinsic collapsed rail is ~5.4rem: 1.5rem nav padding each side, less the -0.5rem group margin, plus a 2.5rem icon button, plus scrollbar-gutter: stable. The plugin's CSS drops the gutter so the documented 4.5rem default actually fits. Go below that and icons clip against .fi-sidebar-nav's overflow-x: hidden.
• Long labels clip during the width transition for the same reason. Either accept it or add overflow-x: clip with a wider padding box.
• Touch devices. The rail is gated on width alone (min-width: 1024px), so a tablet in landscape gets it. What differs is the driver: the JS reads event.pointerType, so mouse keeps the hover peek and touch/pen get the press behaviour above. Touch fires no pointerleave, so a tapped-open flyout is dismissed by a pointerdown elsewhere on the document or by navigating; a hovered-open one is left alone across a Livewire navigation, because the pointer may still be resting on the rail. Gating the CSS on (hover: hover) and (pointer: fine) — as v0.1.x did — drops tablets all the way back to core, which puts core's collapse button back in the topbar and leaves the rail inert under a finger.
• Swallowing that first press takes a capture-phase click listener. preventDefault() on a pointerdown does not cancel the click that follows it, so a tap still navigated. The listener also has to run in the capture phase: Alpine's navigate plugin binds click on the link element itself, so only a listener above it in the tree gets there first, and it takes stopPropagation() — not just preventDefault() — to keep the event off it.
• isOpen still persists. Core $persists it under isOpen / isOpenDesktop, so peeking writes localStorage on every hover. Harmless — the store overwrites from fhs.pinned on boot — but do not treat those keys as meaningful once this plugin is installed.
• Do not attempt a CSS-only version (display: block !important over x-show). Alpine still believes the sidebar is collapsed, so tooltips fire over the now-visible labels, aria-expanded reports false, and icon'd groups stay stuck in dropdown mode.
• The flyout has to paint its own background. Core's desktop sidebar is lg:bg-transparent and just shows the panel colour painted on .fi-body; position: fixed takes it out of the flow, so it needs one of its own. It inherits that down the ancestor chain rather than naming a colour — Tailwind v4 only emits theme variables that are actually used, so --color-gray-50 is not reliably defined, and any hardcoded value breaks custom themes. The :has() selector keeps this off .fi-sidebar-close-overlay, whose translucent scrim is deliberate.
• Render hooks here must be unscoped. Scoping them to the panel id renders nothing. Core passes a page's render-hook scopes (getRenderHookScopes() — page and resource class names) to BODY_START, and passes no scopes at all to TOPBAR_START; a panel id matches neither. Panel::boot() only runs for the active panel, and the hook closures re-check Filament::getCurrentOrDefaultPanel(), so unscoped registration stays panel-correct.
• Version risk lives here. This overrides .fi-sidebar positioning and hides core buttons by class name. Pin filament/filament and re-check vendor/filament/filament/resources/css/components/sidebar.css on minor upgrades.

#Try it without an app

The package ships a Testbench workbench — a throwaway Filament panel wired to the plugin, with no authentication, so /admin opens straight onto the dashboard.

composer install
composer serve

That builds the workbench (sqlite, migrations, filament:assets) and serves it at http://127.0.0.1:8000/admin. composer build runs the build alone.

The panel is defined in workbench/app/Providers/AdminPanelProvider.php at a 4.5rem collapsed rail and 17rem open width, with filler navigation chosen to exercise the parts of the sidebar that are gated on isOpen: long and short labels, badges, a group without an icon (inline list, gated header) and two groups with icons (core's dropdown flyout). Two extra pages are there to test SPA navigation, which replaces the sidebar node and forces the JS to rebind.

The Settings page prints $store.fhs.pinned, $store.fhs.peeking, $store.sidebar.isOpen and the fhs-pinned body class live. The Reports page holds a wide table and prints .fi-main-ctn's left edge, which must not move while the sidebar is open.

#Local development against a real app

"repositories": [
    { "type": "path", "url": "../filament-hover-sidebar" }
]

composer require vitisstudio/filament-hover-sidebar:@dev
php artisan filament:assets

filament:assets must be rerun after any edit to the two resources/dist files — Filament copies them into public/js and public/css.

#Testing

composer test

The package suite covers the PHP surface: plugin defaults, fluent configuration, the sidebarCollapsibleOnDesktop() side effect, the render-hook payload and its scoping, panel isolation, and asset registration.

Note that the render-hook tests deliberately render each hook the way core renders it — BODY_START with a page class as its scope, TOPBAR_START with no scopes — rather than with the scope the plugin registered under. Asserting against the plugin's own scope is self-consistent and proves nothing.

The layout contract itself is browser-level, and a Pest v4 browser test in a host application is the only meaningful coverage:

it('expands the sidebar on hover without moving the content', function () {
    $page = visit('/admin');

    $before = $page->script('document.querySelector(".fi-main-ctn").getBoundingClientRect().left');

    $page->hover('#fi-main-sidebar')
        ->waitForText('Dashboard')
        ->assertScript(
            'document.querySelector(".fi-main-ctn").getBoundingClientRect().left',
            $before,
        );
});

Assert against the content box, not the sidebar's — the sidebar moving is the feature, the content staying put is the contract.

#Relationship to other packages

Deliberately not part of vitisstudio/filament-custom-layout — that package is a record-page content contract (regions, presenters, descriptors); this one is panel chrome. No shared abstraction, disjoint install surface, and the CSS here overrides core internals so it carries the fragile half of the version risk.

#Upstream references

• vendor/filament/filament/resources/js/stores/sidebar.js — the isOpen store
• vendor/filament/filament/resources/css/components/sidebar.css — lg:sticky, widths
• vendor/filament/filament/resources/views/components/sidebar/item.blade.php — tooltip x-effect
• vendor/filament/filament/resources/views/components/sidebar/group.blade.php — group dropdown flyout
• vendor/filament/filament/src/Panel/Concerns/HasSidebar.php — width + collapsible API
• vendor/filament/filament/src/View/PanelsRenderHook.php — hook constants

#Changelog

Please see CHANGELOG for what has changed recently.

#Credits

• Vitis Studio
• All Contributors

#License

The MIT License (MIT). Please see License File for more information.