getImageData causes “Uncaught Error: NOT_SUPPORTED_ERR: DOM Exception 9”
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03-06-2021 - |
Pergunta
I'm trying to get a feel for some image manipulation in HTML5. I am finding that when I try and use the getImageData method I get this JS exception thrown. I am using Chrome and running on localhost.
Thanks!
Solução
Okay figured out what the problem was. All I have to say is "derp". I was using
getImageData(x, x)
but the way I was intending to use this requires 4 arguments
getImageData(x,x,x,x)
Outras dicas
It could be an issue with editing files on your local system using Chrome. You can close Chrome and reopen it using flags --allow-file-access-from-files to allow local file editing.
Came across this post when I ran into a similar issue and it helped.
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