The app itself is well done, but the editing experience is quite lacking...It's 2018 and people don't want to write html/css/js as if writing txt files. https://codesandbox.io can be a good inspiration to learn from. I believe its popularity is a result of using Monaco[0] and supporting Language Servers[1].
I would advise looking into editing/language support early. Auto completion (for DOM API, D3 API, etc) and error checking can be very helpful to the user.
Still, congratulations to the launch (the app looks beautiful and UX is pretty solid)! When I was reading @mbostock's medium post[2] a few months ago I knew something like this will popup.
Anyway, back to building my own thing which focuses on the editing side of playgrounds, which I think is what most online ones (Codepen / JSFiddle) lack.
I would advise looking into editing/language support early. Auto completion (for DOM API, D3 API, etc) and error checking can be very helpful to the user.
Still, congratulations to the launch (the app looks beautiful and UX is pretty solid)! When I was reading @mbostock's medium post[2] a few months ago I knew something like this will popup.
Anyway, back to building my own thing which focuses on the editing side of playgrounds, which I think is what most online ones (Codepen / JSFiddle) lack.
[0]: https://microsoft.github.io/monaco-editor
[1]: https://microsoft.github.io/language-server-protocol
[2]: https://medium.com/@mbostock/a-better-way-to-code-2b1d2876a3...