WP-REST-API: non-namespaced route

We are using old WP-REST-API aka (JSON-REST-API)  for years and time to move on WordPress’ core REST API.

But there is a problem, new API requires namespace that we haven’t used it before. There is no problem with splitting long endpoints. I mean ,if you used ‘/foo/bar/’ as endpoint before, you can use ‘foo’ as namespace and ‘/bar’ as endpoint. But if you were using ‘/foo’ , how to migrate new REST API?

The answer is non-namespaced route.

add_action( 'rest_api_init', function ( $server ) {
$server->register_route( 'foo', '/foo', array(
'methods' => 'GET',
'callback' => function () {
return 'baz';
) );
} );

will register ‘/foo’ endpoint.

As a reminder, please ensure before registering non-namespaced routes. They can be useful for backward compatibility only.

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