• Are you asking for something like:

    When Espruino board is connected to Espruino Web IDE and sending something to console, the IDE should open a prompt so you can enter some data that then is read by Espruino board and processed?

    If that is so, you would have to customize the Espruino Web IDE - which, of course - written in JavaScript. @JumJum's Testing module is already doing something like that: capturing information that Espruino is sending to the IDE (console).

    You get the Espruino Web IDE source onto your computer and load it from there instead of from Web. Then you begin to modify the code until it does what you want... ;-)

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