Processing.js program that displays a getImage cannot be Saved.
- Dominant language
- JavaScript
- Stars
- 776
- Forks
- 180
- PR merge metrics
- No merged PRs in 30d
Description
The one line program
image(getImage("avatars/avatar-team"), 100, 100);
cannot be Saved. The gripe is
Uncaught DOMException: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported.
at i.getScreenshot (https://cdn.kastatic.org/genwebpack/prod/en/4YZv.6a1ed31e9871d479e50b.js:1:31485)
at i.handleMessage (https://cdn.kastatic.org/genwebpack/prod/en/2Sin.8ae3ec2940569b614452.js:1:5533)
Contributor guide
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Research direction
Reproduce the one-line Processing.js program using getImage("avatars/avatar-team") and attempt to save it. Trace the save flow through the getScreenshot and handleMessage entry points shown in the error, then verify that saving no longer raises the tainted-canvas toDataURL exception.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- frontend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100