How to fix "Tainted canvases may not be exported"?

Question

Canvas

SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported.
There was a similar question, but I did not understand how to fix it.
I have a js code and a picture (used in the canvas) on my computer in the same folder, but I can’t save the entire canvas (I’m testing from a computer).
By chance, it's not that I'm running the page (code) from the computer and opening the file from the hosting will everything be fine?

Answer 1

As far as I remember, yes, that's exactly the point. Security error when using local files.
Why don't you check hosting? Finally, upload the images to a free image hosting site and the code in jsfiddle or codepen and check it out.

Answer 2

Thanks, I'll do that ... I was just afraid that the process itself would take a long time (registration, etc.). Trust without verification - much easier)