1. app/helpers.app
2. register it inside composer.json

       "autoload": {
           "psr-4": {
               "App\\": "app/",
               "Database\\Factories\\": "database/factories/",
               "Database\\Seeders\\": "database/seeders/"
           },
           "files": [
               "app/helpers.php"
           ]
       },

function isMenuItemSelected($url)
{

    if (url()->current() == $url)
        return 'active';
    return;
}

how to detect currently active menu item

      <a
                href="{{route('forms.index')}}"
                class="list-group-item list-group-item-action py-2 ripple {{isMenuItemSelected(route('forms.index'))}}"
            >