Why newFile.error is assigned on Automatic compression & image size in full example docs?

[lucianobosco]

I was taking a look at full sample docs and found something odd.

if (newFile.file && newFile.error === "" && newFile.type.substr(0, 6) === 'image/' && this.autoCompress > 0 && this.autoCompress < newFile.size) {
          newFile.error = 'compressing'
          .......

if (newFile && newFile.error === '' && newFile.type.substr(0, 6) === "image/" && newFile.blob && (!oldFile || newFile.blob !== oldFile.blob)) {
        newFile.error = 'image parsing'
        .......

The question is: why are you assigning the .error property while processing the file? I'm pretending to show the file status but in this way, once the file is selected, my UI shows an error message while it's being processed.
I'm aware that this can be completely removed or handled in another way, but just wondering why do you do that.

Wouldn't be a better idea to have a file.processing property in order to achieve that?