I have very limited knowledge of JavaScript. Trying to script my IoT device with the help of a known LLM, I boiled down my issues to this:

let testArray = [3, 1, 2];
print("Does sort exist?", typeof testArray.sort);  // Should print "function"

returning:

Does sort exist? undefined

So it looks like Shelly's version of JavaScript (Espruino, according to this) does not have .sort on arrays. Printing the type of testArray gives array, not Array.

It looks to me that scripting from within this Shelly device is going to be frustrating, as it seems not to follow a recent standard version of JavaScript.

Do I misunderstand something? Is there something I can do to make my Shelly Pro 1 sort an array?