Calling a class function inside of another function in the same class [duplicate]

Question

I'm trying to do something in Javascript where I call a return function inside of another function, all within a class, it goes something like this:

class MyClass {
 constructor (x,y) {
  this.x = x;
  this.y = y;
 }

 newValues () {
  this.x = findNextXValue(this.x);
 }

 findNextXValue (x) {
  let changeVal = x + 5;
  return changeVal;
 }

}

When I try this code in p5js I get an error saying that findNextXValue is not defined. Why can't I do something like this? Any clarification would be appreciated, thanks.

Answer 1

Missing this should be...

this.findNextXValue(this.x);

But you really don't need to pass this.x either. Just access this.x in the function.