composer require isaeken/laravel-theme-system

php artisan vendor:publish --provider="IsaEken\ThemeSystem\ThemeSystemServiceProvider" --tag="theme-system-config" --tag="theme-system-migrations"
php artisan migrate

php artisan themes:init

theme_system()->setTheme('your-theme-name');

theme_system()->getCurrentTheme();

// \App\Models\User.php
class User extends Authenticatable
{
    use \IsaEken\ThemeSystem\Traits\CanChooseTheme; // Add this
    
    // ...
}

// In your controller or middleware
auth()->user()->theme; // theme for user.
auth()->user()->theme = 'default'; // theme is saved to db.

auth()->user()->themeApply(); // changed current theme to user theme.

php artisan make:theme your-theme-name

const mix = require('laravel-mix');

mix
    .js(themeResourceRoot + '/js/app.js', 'js')
    .postCss(themeResourceRoot + '/css/app.css', 'css', [
        //
    ]);

exports.mix = mix;

protected $routeMiddleware = [
    // ...
    'theme' => \IsaEken\ThemeSystem\Http\Middlewares\ThemeMiddleware::class,
];

Route::group(['middleware' => 'theme:your-theme-name'], function () {
    // ...
});

Route::get('/hello-world', fn () => 'Hello World!')->middleware('theme:your-theme-name');