One that fixes parentheses that I left off or automatically fixes typos in variable names or function calls. Webstorm can do some of what you mention: https:/

One that fixes parentheses that I left off or automatically fixes typos in variable names or function calls. Webstorm can do some of what you mention: https://news.ycombinator.com/item?id=15514285 https://news.ycombinator.com/item?id=15514285 https://news.ycombinator.com/item?id=15638652 https://news.ycombinator.com/item?id=15638652 One that knows to keep things DRY and creates a function for me when it sees the same similar code written twice. Unfortunately this is "sufficiently smart compiler" territory. I'd love to be wrong about that though.