Doesn't re-render on HMR

[zephraph]

I'm using vite and in dev mode when HMR happens on a module that calls a tunnel, the tunnel itself isn't re-rendered.

I've written a helper as a work-around:

import t from 'tunnel-rat'

export const tunnel = (key: string) => {
  if (import.meta.hot) {
    const fullKey = `tunnel-${key}`
    if (import.meta.hot.data[fullKey]) {
      return import.meta.hot.data[fullKey]
    }
    import.meta.hot.data[fullKey] = t()
    return import.meta.hot.data[fullKey]
  }
  return t()
}

The helper requires a key so that it can persist the tunnel instance in import.meta.hot.data. I'm not incredibly experienced in HMR, so I'm not sure if there's a better solution here.

I believe the issue may have been masked before because we were never clearing the tunnel contents.

[drcmda]

is this something that can safely be published that way? or will it inhibit some bundlers or environments?

[zephraph]

I've got a safer solution. It's a minor breaking change, but worth it I think. I'll PR it.

[lunacrafts]

I've got a safer solution. It's a minor breaking change, but worth it I think. I'll PR it.

@zephraph Could you say more about this change? I'm going to re-implement the same pattern very soon and I'd love to have HMR

HMR api has been improved in vite3
https://vitejs.dev/blog/announcing-vite3.html#dev-improvements