Replace Axios with native XMLHttpRequest

[claudiodekker]

This PR serves as a basis / starting point for eventually migrating away from Axios. The basic functionality presented works, but file uploads have not been tested.

This PR will remain a WIP as to not accidentally get pulled in to core.

[clementmas]

I think removing the dependency on axios is a good move. However why not use fetch instead of XMLHttpRequest?

If browser compatibility is the issue, then you can't use URLSearchParams either.

[citricguy]

Would there still be some sort of API available to mimic axios interceptor behavior after this change?

For example, could this still be accomplished without any odd hacks:

axios.interceptors.response.use(response => response, async err => {
  const status = get(err, 'response.status')

  if (status === 419) {
    // Refresh our session token
    await axios.get('/csrf-token')

    // Return a new request using the original request's configuration
    return axios(err.response.config)
  }

  return Promise.reject(err)
})

https://dev.to/grantholle/better-csrf-refreshing-in-laravel-and-axios-177c

[reinink]

Hey! Thanks so much for your interest in Inertia.js and for submitting this contribution.

In an attempt to get on top of the issues and pull requests on this project I am going through all the older issues and PRs and closing them, as there's a decent chance that they have since been resolved or are simply not relevant any longer. My hope is that with a "clean slate" me and the other project maintainers will be able to better keep on top of issues and PRs moving forward.

Of course there's a chance that this PR is still relevant, and if that's the case feel free to re-submit it. If it's a new feature and not a bug fix maybe respond here first to make sure that it's something we want to include in the library.

Really not trying to be dismissive here, I just need to find a way to get this project back into a state that I am able to maintain it. Hope that makes sense! ❤️