Add CORS headers to 404 page

I forgot the reason for the question) The main problem was that when you request /api/some to send a 404 chttpexception in response, there will be an error on the client due to OPTIONS. I expected that 404 would be processed correctly and the client would receive JSON with an error (in fact, it works, only OPTIONS breaks).

It seems It is because you did not define the route for OPTION method.

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Up)
My routes have OPTIONS. I have stopped working on this, but I may come across it later.

$routes->match(['POST', 'OPTIONS'], 'users/register', 'User::register', ['as' => 'api.user.register']);