There's no obvious way of finding the version number I'm afraid.
Instructions for installing are on GitHub - it's pretty straightforward: https://github.com/espruino/EspruinoWebIDE#installing-from-github-latest-version
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
There's no obvious way of finding the version number I'm afraid.
Instructions for installing are on GitHub - it's pretty straightforward: https://github.com/espruino/EspruinoWebIDE#installing-from-github-latest-version