Could I2C.readFrom() be made to return a Uint8?

Hopefully this is the proper place the following question:

with the following code:

I2C1.setup({sda:D4,scl:D5});

//var result;

function m(){
var PAYLOAD = [];
var data = [];
  for (var i = 0; i < 2; i++){
    I2C1.writeTo(0x40,(i));
    data = I2C1.readFrom(0x40,0x02);
    PAYLOAD.push(data);
	}
  
//result = PAYLOAD;
  return PAYLOAD;
  
}

I get the following output:

 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v86.tve_master_247bc37 Copyright 2016 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
Flash map 4MB:512/512, manuf 0xe0 chip 0x4016
>echo(0);
=undefined
>
=undefined
>m();
=[
  new Uint8Array([113, 39]),
  new Uint8Array(2)
 ]
> 

My question(s):

1.- What is the purpose of displaying new Uint8Array([113, 39]), instead of [113, 39]?