When will be `response_type` be available?

[GabriFila]

The official API documentation marked the completed parameter as deprecated in favor of the response_type param.

I'd like to know 2 things:

1. when will the be included in the js-api-client?
2. will the API/client throw an error when thecompleted is specified and it won't be supported anymore? Or will it be ignored

Thank you