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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.
Tx
In Espruino,
onis part of every object, so you can find the docs at http://www.espruino.com/Reference#l_Object_onCalling
ontwice is no problem, but then you end up with both functions getting called. You can use.removeListeneror.removeAllListenersto get rid of old ones (I'd recommend not using removeAllListeners as it may interfere with widgets that had registered their own handlers).Examples of use are at that link above