Comment by conoro

As a long-time Espruino user I was immediately interested.

At first glance Espruino has broader coverage including quite a bit of ES6 and even up to parts of ES2020. (https://www.espruino.com/Features). And obviously has a ton of libraries and support for a wide range of hardware.

For a laugh, and to further annoy the people annoyed by @simonw's experiments, I got Cursor to butcher it and run as a REPL on an ESP32-S3 over USB-Serial using ESP-IDF.

Blink is now running so my work here is done :-)

  led.init(48)
  
  function blink() {
    led.rgb(0, 0, 255)
    setTimeout(function() {
      led.off();
      setTimeout(blink, 500)
    }, 500)
  }
  blink()