https://rety.verou.me/

rety

Live coding without the stress

Usage API FAQ Actions GitHub

Demo

[button {  border: .1] [<button>Click me</bu] [[  {"type":"caret","]

Real-time recording demo

Make some edits here: [* {  color: red; }  ] [<button>Click me</bu] 
Observe them being replayed here:
Made in haste, by [Lea Verou](https://lea.verou.me). [Pull requests
welcome](https://github.com/leaverou/rety)