Check out Firepad. The right way to do this is to have a real-time database that synchronizes all data and have each client listen to updates and rerenders accordingly. Source: about 2 years ago

This is a collaborative code editor I built in a week, after being frustrated with existing solutions like Firepad (unmaintained project, locked to Firebase, lack of customization). The server has operational transformation control algorithms implemented in async Rust with warp's WebSockets and tokio. The TypeScript client interfaces with Monaco & also has some Rust code for the text transformation step, which is... Source: about 3 years ago

Alternatively, you can use an online markdown editor like StackEdit or HackMD. - Source: dev.to / 5 months ago

Use https://stackedit.io/ in the browser :). Source: 7 months ago

Markdown is awesome! But, when writing 1000 words+ articles, I quickly feel the need for a better experience. For years, I’ve used StackEdit — an open-source, in-browser Markdown editor — for editing all kinds of long-format Markdown text. That said, given my recent experience with WYSIWYG editors, I thought I could do something better. - Source: dev.to / 11 months ago

This is especially annoying as when I export from stackedit.io to HTML, then it just cuts off anything which is outside the greyed in code window! Source: 11 months ago

StackEdit[0] pretty much perfected what I needed out of a markdown editor - I just need somewhere to write my tickets/docs that wasn't Github so that I could format it properly while writing. I still use it from time to time [0]: https://stackedit.io/. - Source: Hacker News / 12 months ago