[kackontent]

I tried WebStorm and found their support for TS severly lacking, IIRC it was limited to automatic compilation and basic syntax detecting. Code understanding/static type analysis was basically non-existent, e.g. it wasn't checking if argument conforms the interface described in the method's definition - you had to compile the script to find that out.

[nawitus]

It does check if the arguments are correct these days.