How do I test to see if an image is empty?
The issue is that it is hard to filter the file dialog in such a way
that only images or videos are selectable cross platform and then you
have drag and drop... so I tried testing after a drag and drop (which
sets the filename property) to see if the image has any data... so if
you choose a text file or pdf the filename property is set (which is
a pitty) and the imageData is not empy...
There is nothing that I now of like "file is an image"...
Any ideas of how to figure out after setting the filename of an image
whether it worked or not?
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