Use SWR in "pure js"

[hems]

Bug report

This is more of a "serious" Feature Request than a bug report.

The idea here is that my application isn't 100% written in React.

Some of the logic is written in pure js and if/when needed the javascript part of the application will populate a "Store" ( written using zustand ) so the React components can react accordingly.

Unfortunately SWR doesn't seem to work unless you use the "useSWR" hook which is a shame, SWR provides a lot of good features that "pure js" or "hybrid" ( pure js + react ) applications would benefit from.

There is a discussion here about it as well: https://github.com/vercel/swr/discussions/801

Description / Observed Behavior

Not being able to benefit from all SWR features from a pure js perspective

Expected Behavior

Something similar to zustand as in: works as a hook but also works as pure js

Additional Context

Thank you very much for your hard work, this library is amazing and very very helpful.

[shuding]

This can be one of our long-term goals, but it definitely needs a lot of implementation discussions.

[hems]

This can be one of our long-term goals, but it definitely needs a lot of implementation discussions.

I believe the implementation would be pretty much the same the only difference is that it would emit an event when the values are changed instead of re-triggering render like it does inside of a component?

i.e.

import useSWR from 'swr'

function Profile() {
  const instance = useSWR('/api/user', fetcher)
  instance.on('update', ( { data, error } ) => {
    // update my zustand or whatever state i have to update
  })
}

or another option would be to send an onUpdate function as part of the configuration?