Cross-origin data error – Khan Academy Help Center

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Larry Serflaten

February 26, 2022 12:59

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Loading and/or using images in the JavaScript programming editor has recently been producing an error:

"Failed to execute 'getImageData' on 'CanvasRenderingContext2D': The canvas has been tainted by cross-origin data."

Example code from previous KA community contest: (It worked before!)

https://www.khanacademy.org/computer-programming/contest-the-great-outdoors/6753170736758784

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3 comments

AhiruGēmā

February 26, 2022 16:31
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I can't really diagnose the problem, as I have a limited knowledge of fixing bugs like this, but it would probably be wise to make sure you are using only images khanacademy allows. If you are making an HTML document, you can use built-in images and wikipedia images. In JS you can only use built-in images. Hope this helps!
Larry Serflaten

February 26, 2022 16:48
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Thanks for the reply. Only approved images were used. I hear the KA team is aware of the problem and are working on the fix.
Evan Lewis

February 28, 2022 18:20
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Hi everyone!

We've deployed a fix for this and believe the issue should now be resolved.

Thanks for your patience on this, and please let us know if you're still running into any issues!

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