Note: the suggestions in this article often rely on using npm dependencies in your project, which is currently a feature only available in the desktop app to those on the Pro or Enterprise plan.
Web Components (Stencil/Polymer)
Since Web Components are simply HTML, it is pretty easy to use them in Framer. Check out this article to learn how to set up a Design System using Stencil Components.
You can also check out this package to see an example of Polymer components in Framer.
Some frameworks like Vue.js, React Native, Angular, and Preact aren’t directly possible to use in Framer, but are still on our radar for us to further explore the possibilities.