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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.
@Gordon
There's some rough documentation at https://github.com/espruino/Espruino/blob/master/scripts/common.py#L61 and https://github.com/espruino/Espruino/blob/master/README_BuildProcess.md#wrapper-files-
Basically if you write an extension they are functions that hook into Espruino itself.
initruns when the JS environment starts (eg. power on, reset, load)killis when is shuts downidleis basically once every time around the event loop