fb-flo is a Chrome extension that lets you modify running apps without reloading. It's easy to integrate with your build system, dev environment, and can be used with your favorite editor.
Live editing is awesome, it tightens the feedback loop between writing code and seeing the results, and makes it easy to get into flow and iterate faster on code. When we set out to bring live coding to web development at Facebook we couldn't find anything that works with our set of constraints:
|Feature||fb-flo||Chrome Workspaces||Emmet Livestyle||Live Reload|
|Live edit JS code||✓||✓||✗||✗|
|Live edit CSS code||✓||✓||✓||✗|
|Live edit images||✓||✗||✗||✗|
|Build step support||✓||limited*||✗||✓|
|Browser support||Chrome||Chrome||Chrome, Safari||All|
fb-flo is made up of a server and a client component.