plugin hook for when vite opens the browser

[rtabulov]

Description

it would be nice if you added a new hook for when vite opens the browser.

in our team we have a 'mirror-plugin' in one of our projects which mirrors the same app on another port, so that we have additional ports when using vite dev command, we use it something like this

    plugins: [
        react(),
        mirrorPlugin(3021),
        mirrorPlugin(3022),
    ],

we wanted to also open these ports (url) in browser when vite opens the browser
the problem is we open the urls on configureServer hook at server.httpServer.on('listening', ...) after checking server.config.server.open, but this does not really reflect when the browser is actually opened by vite.

it would be nice to have a hook for when vite opens the browser for a plugin like ours.

Suggested solution

add a vite plugin hook for when vite opens the browser, something like browserOpened

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[patak-dev]

I don't know if there is a good way for us to expose this new hook, and this hasn't been a need other users have asked so far. You could add a middleware to check when the browser sends the first request to know that is has been opened and use that to implement this feature.