Removing the layer from the map should cancel pending HTTP requests

[cosme-benito]

TL;DR: When you remove a NonTiledLayer from the map, it should cancel the pending HTTP requests. This can be done with something like

_abortLoading() {
    const image = this._useCanvas
      ? this._currentCanvas._image
      : this._currentImage;

    if (image != null) {
      image.src = this.emptyImageUrl;
      image.onload = Util.falseFn;
      image.onerror = Util.falseFn;
    }
  },

---

The problem I encountered is a bit wonky but can be reliably reproduced:

• Put a breakpoint on the WMS server, preventing it from answering HTTP requests
• Add NonTiledLayer to the map
• Remove the NonTiledLayer from the map
• Add the (same) NonTiledLayer to the map again
• Remove the breakpoint on the WMS server, resume flow as normal
• The layer does not show up in on the map. If you zoom in/out it shows up.

What's currently happening:

• A single HTTP request is pending

What I expected to happen:

• The first request should have been canceled
• A second request should have been fired
• This would fix the problem

[oliverheilig]

Hi,

your proposal looks reasonable to me. The issue is that no one actively works on the project at the moment, but feel free to create a PR.

But then the question would be if you also want a new release. It has been more than 3 years since the last release (1.0.9), we would need to check how we can roll this out then.