Tiptap
The headless editor framework for web artisans
...You are in full control over markup, styling and behavior. Real-time collaboration, syncing between different devices and working offline isn’t hard anymore. Keep everything in sync with the magic of Y.js. Out of the box, Tiptap works with Vanilla JavaScript and Vue.js, but it’s also possible to use it in React, Svelte and others. There’s so much content shared, so many people helping out in issues and a ton of community extensions, you’ll be surprised how much that all can help. TypeScript helps to find bugs early and gives you a nice autocomplete for the API on top of the extensive human-written documentation.