[Feature request] add loadstart event

[jimblue]

It could be nice to add XMLHttpRequest loadstart event inside Axios.

There is actually no event callback when the request start that could be use to display a loading spinner.

Thanks

[Orlandster]

Agreed. I think often you really don't need this, since you will trigger those kind of things (spinners etc.) on the event which triggers the request. But I can see use cases where you really want to trigger it on the loadstart.

As you already mentioned a callback on the data object would do the job. Something like this:

{
  onLoadStart: function() {
    // load started
  },
}

Are you going to implement this? Otherwise I would probably find a some time by the end of this week to do so.

[jimblue]

Hey @Orlandster,

I'm not the best with js so it's probably better if you start the PR.
But I would be happy to help you by giving some feedbacks and making tests!

Cheers

[Orlandster]

@jimblue Sounds good. I'll keep you updated.

[skyFi]

Waiting for this...

[flycj]

Waiting for this...

[takhello]

Waiting for this...

[badeggg]

Waiting for this...

[jasonsaayman]

See #4209