->collapsedSidebarWidth() not taking effect

What I am trying to do:

Adjust the width of the collapsed sidebar.

What I did:

Used

->collapsedSidebarWidth()

->collapsedSidebarWidth()

->collapsedSidebarWidth()

->collapsedSidebarWidth() with different values (like

'9rem'

'9rem'

'9rem'

'9rem') as in the example at https://filamentphp.com/docs/3.x/panels/navigation#customizing-the-width-of-the-sidebar

My issue/the error:

The width of the collapsed sidebar does not change.
Looking in

vendor/filament/filament/resources/views/components/sidebar/index.blade.php

vendor/filament/filament/resources/views/components/sidebar/index.blade.php

vendor/filament/filament/resources/views/components/sidebar/index.blade.php

vendor/filament/filament/resources/views/components/sidebar/index.blade.php I do see references to

w-[--sidebar-width]

w-[--sidebar-width]

w-[--sidebar-width]

w-[--sidebar-width], but not to

w-[--collapsed-sidebar-width]

w-[--collapsed-sidebar-width]

w-[--collapsed-sidebar-width]

w-[--collapsed-sidebar-width].
Am I doing something wrong, or is this a bug?

Code:

<?php
class AdminPanelProvider extends PanelProvider {
  public function panel(Panel $panel): Panel{
    return $panel
      // ...
      ->sidebarWidth('16rem') // Has effect on the full sidebar
      ->sidebarCollapsibleOnDesktop()
      ->collapsedSidebarWidth('9rem'); // Has no effect at all
    }
}

<?php
class AdminPanelProvider extends PanelProvider {
  public function panel(Panel $panel): Panel{
    return $panel
      // ...
      ->sidebarWidth('16rem') // Has effect on the full sidebar
      ->sidebarCollapsibleOnDesktop()
      ->collapsedSidebarWidth('9rem'); // Has no effect at all
    }
}

<?php
class AdminPanelProvider extends PanelProvider {
  public function panel(Panel $panel): Panel{
    return $panel
      // ...
      ->sidebarWidth('16rem') // Has effect on the full sidebar
      ->sidebarCollapsibleOnDesktop()
      ->collapsedSidebarWidth('9rem'); // Has no effect at all
    }
}

<?php
class AdminPanelProvider extends PanelProvider {
  public function panel(Panel $panel): Panel{
    return $panel
      // ...
      ->sidebarWidth('16rem') // Has effect on the full sidebar
      ->sidebarCollapsibleOnDesktop()
      ->collapsedSidebarWidth('9rem'); // Has no effect at all
    }
}

Navigation - Panels - Filament

Dennis Koch•7/24/25, 11:02 AM

Yeah, looks like a bug.

Dennis Koch•7/24/25, 11:03 AM

Can you open an issue on GitHub please?

BoustrophedonOP•7/24/25, 11:12 AM

Will do!

Soundmit•11/21/25, 2:15 PM

hi! any news on this?
i'm on 4.2.3

thanks

Soundmit•11/21/25, 2:23 PM

i've opened an issue but as i don't have a public repo, was rejected
https://github.com/filamentphp/filament/issues/18568

GitHub

->collapsedSidebarWidth() not taking effect · Issue #18568 · fila...

Package filament/filament Package Version v4.2.3 Laravel Version v12.39.0 Livewire Version No response PHP Version PHP 8.3.28 Problem description in the Panel configuration, the collapsed sidebar w...

Dan Harrin•11/22/25, 10:24 AM

Create a public repo, attach it to the issue, and it should automatically reopen. If it doesn't, then tag me.

DDan Harrin Create a public repo, attach it to the issue, and it should automatically reopen...

Soundmit•11/24/25, 12:20 PM

Unfortunately I’m working on the project alone and I don’t have time — for now it’s fine as it is.
If I have time, I’ll definitely do it.
Anyway, it’s a normal Filament installation, with the collapsed sidebar, and the width set in the panel isn’t being applied.

->collapsedSidebarWidth() not taking effect

Similar Threads

Similar Threads

Similar Threads