How can Javascript returns a string formatted as a gcode co-ordinate

Question

function gcodeXY(source){
    var s = source;
    var f = s.split(",");
    var r = f.join(" ");
    //perhaps split source
    return r;
}

How can Javascript returns a string formatted as a gcode co-ordinate? The picture is the desired input and output, and my current output. So I want to know how I should add X and Y.

Answer 1

f is an array with 2 elements. You can destructure it and then add X and Y

function gcodeXY(source){
    var [xVal, yVal] = source.split(",");
    return `X${xVal} Y${yVal}`
}

console.log(gcodeXY("1,2"))