Capture domain in Laravel routes file as url variable

I have a problem capturing the domain in the routes file.

When a route is written like this:

Route::domain('mydomain.com')
    ->get('/', function () {
        return "It works";
    });

And I access mydomain.com, I correctly get status 200 and a string It works.

But when the routes are changed to this:

Route::domain('{domain}')
    ->get('/', function () {
        return "It works";
    });

It is not getting picked up and I get 404.

I was also trying:

Route::bind('domain', function () {
    return 'mydomain.com';
});

Route::domain('{domain}')
    ->get('/', function () {
        return "It works";
    });

But it is not working either.

Any idea what am I doing wrong?

>Solution :

Define a custom pattern for the {domain} parameter using regular expressions.

Route::pattern('domain', '[a-z0-9.-]+'); // Define pattern for the domain parameter

Route::domain('{domain}')
    ->get('/', function ($domain) {
        return "It works for {$domain}";
    });