Faster way to check Laravel component existence

If you want to check the existence of a component, for whatever reason, you may use livewireComponentsFinder class to achieve it.

To access livewireComponentsFinder methods, do the following:

1app(LivewireComponentFinder::class);

Then, we need to access the livewire manifest (the cached livewire components):

1app(LivewireComponentsFinder::class)->getManifest();

it returns an array of components, something like:

1array:1 [
2    'slug-generator' => "App\Http\Livewire\SlugGenerator",
3]

All we need, is to search against the given array:

1$manifest = app(LivewireComponentsFinder::class)->getManifest();
2 
3return (bool) array_search(SlugGenerator::class, $manifest); // return boolean

If we want to use it as a global function, we may need to make it works globally,

 1/**
 2 * Check if the livewire component exists or not
 3 *
 4 * @param object|string $component
 5 * @return bool
 6 */
 7function lw_component_exists(object|string $component): bool {
 8    $manifest = app(LivewireComponentsFinder::class)->getManifest();
 9 
10    if ($component instanceof Livewire) {
11        return (bool) array_search($component, $manifest);
12    }
13 
14    if (is_string($component)) {
15        return (bool) array_key_exists($component, $manifest);
16    }
17 
18    return false;
19}

We check, if the given component is an object type (class), or a string, based on that, we search for the key or the value.

---

Update

Since the component manifest will be deleted in the upcoming version of livewire (V3), I found another way to the same trick with another methods, which is the following:

 1use Livewire\Livewire;
 2 
 3function lw_component_exists(string $component): bool {
 4    try {
 5        Livewire::getClass($component);
 6 
 7        return true;
 8    } catch(\Throwable $th) {
 9        return false;
10    }
11}

It's simply getting the class name, and if it's not existed, it simply throws a ComponentNotFoundException, and you may deal with it however you like.

That's all ;)