Add the ability to add and remove hooks on existing instance

[rtorrente]

Hi everyone,

What do you think about adding the ability to add and remove hooks on an already created instance? I know it's possible to modify an instance with extend, but in this case a new instance is created and the hook on the original instance are not modified.

The use case I have in mind is the possibility of adding a hook from a useEffect in a React application that can be removed when the useEffect is cleaned up. This may be necessary if a JWT token is stored in a React context, for example.

On axios there is two functions for add/remove

const myInterceptor = axios.interceptors.request.use(function () {/*...*/});

axios.interceptors.request.eject(myInterceptor);

Maybe I'm going in the wrong direction and this isn't the right method for this use case?

[sholladay]

Your question seems based on the premise that the original instance still existing is a problem. But why is it a problem? Once you've created your new instance, you can just stop using the original one and it will be garbage collected.