How to split an unusual variable into parts?

Question

JavaScript

There is such a variable, not a string, can I somehow separate everything up to the first comma?

var pos = new mp.Vector3(-2963.1335, 482.7227, 14.703);

Answer 1

Maybe pos.x

Answer 2

If this is a string, then you can use regex or simpler means of working with strings.
If it's an array, then by array index.
But in appearance - most of all it looks like a function call.