Contact VisualizeJS
VisualizeJS is maintained by Tornike Nizharadze. Pick the channel that matches what you want to say, and you will get an answer faster.
Bugs and content errors
Open an issue on GitHub. Include the topic, the step number, and what you expected to see. If a theory section states something inaccurate, a link to the spec or the official docs helps a lot.
Security issues
Please do not open a public issue for a security problem. Use GitHub's private vulnerability reporting instead, which is visible only to you and the maintainer. You can expect a first response within 7 days.
Contributions
Fixes, clearer steps, and new topics are welcome. For anything larger than a small fix, open an issue first so the approach can be agreed before you spend time on it.
Everything else
For feedback, collaboration, or questions that do not fit an issue, send a message on LinkedIn.