All usual methods of accessing the language work: you may execute scripts, standalone statements, or even completely replace IDC with JavaScript.
All IDC functions are availalble in JavaScript (in fact, we just exported them one-to-one). In the future, we will export IDA objects into JavaScript and this will make programming it even easier.
Download the plugin here:
/ida_pro/files/js.zip
If you notice anything unusual, send us a note, thank you!
Elias will blog more about the plugin in the coming days, and maybe present something handy, as he already did in the past 😉
P.S. I subscribed to twitter a few days ago – it is so dynamic. Will probably switch to it, at least partially