Back when i learned about Lighttable years ago i found the instant preview and live editing of running code very cool!
I just realized thats basically what we already do today: i use WebStorm and my webapp hot-reloads any code i type. If i wanted i could even rewind the app state. And when i enable JS debug in IDE its like inception and matrix-view combined, but surprisingly userfriendly still.
The difference is that LightTable gives you inline previews of individual expressions, not just the final result. This is really nice to have for debugging why the final result isn't what you expected.
I just realized thats basically what we already do today: i use WebStorm and my webapp hot-reloads any code i type. If i wanted i could even rewind the app state. And when i enable JS debug in IDE its like inception and matrix-view combined, but surprisingly userfriendly still.
To easily try this with just about any IDE check out https://github.com/facebook/create-react-app