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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.
gdanov
Usually Espruino doesn't load code if a button is pressed at boot, but unfortunately it looks like on the normal ESP32 build no pin has been defined for this, so I'm not really sure there's a way.
You could always boot to the bootloader mode and then erase the first page of Storage (at 0x320000 I think?)