No, unfortunately not at this time.
But shortcuts for disabling JS are planned.
Good to hear, some sites just work better with it switched off.
IMO, it would make sense to have a toggle button right next to the "Show Images" button.
While we wait for a button to be implemented; I installed "Script Blocker for Chrome™", you can block/allow all scripts on a page in two clicks and there's site whitelist/blacklist. There's other similar extensions as well, I just picked one that's fast and easy to use.