What are some no-design Javascript project ideas for my portfolio?

Starting your own GitHub repo for each project is a solid idea. It allows potential employers to see the work you've done. You can make these repos public or private, then link them through your portfolio site. That way, you can focus on the functionality of the code, and let your site handle the presentation.

You could try creating a JavaScript library or a linter rule. Working on open-source projects can also be a great way to showcase your skills. You might consider something like developing a webpack plugin or even wrapping a C++ binary to create tools for JavaScript. Just keep it focused on coding skills without worrying about the UI design too much.

A good approach is to look for designs you like on Behance and try to recreate them using UI libraries as building blocks. This way, you're still working on coding but have some design structure to follow.

Honestly, I doubt there's a dedicated site exactly for what you're asking. Most developers lean towards UI libraries for components. Your best bet might be to find inspiring templates online and then implement them on your own.

If you really want to avoid design, consider using UI libraries like Bootstrap for the CSS part. They provide lots of components that can save you time, so you can focus more on the work you're doing with JavaScript.