Abort upload with UIkits Upload Component?

Question

The title says it all. How can I abort the upload with UIKits Upload Component?

I'm trying to abort the upload in the beforeAll callback but I can't seem to get it to work.

UIkit.upload('.js-upload', {
    url: '',
    multiple: false,
    mime: 'audio/*',
    allow: '*.mp3',

    beforeAll: function () {
      return false; // <--- Why does it not return/abort?
      });
    }
 });

Answer 1

Have a look at the source code. The return value from beforeAll isn't used.

The best option I see to abort the request is to get hang of the XMLHttpRequest object and call abort() on it:

UIkit.upload(".js-upload", { 
  // ...
  loadStart: function (e) {
    e.target.abort();
  },
  abort: function (e) {
    // clean up after abort
  }
  // ...
});