But I changed front-end for my project, so I can't use editor window.
Maybe you could just try with a project where you haven't remove the editor window?
@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.
Maybe you could just try with a project where you haven't remove the editor window?