JavaScript with function having inconsistent return points

Question

Let's say I have this Class:

function Point(x,y){
  var _x=x,_y=y;
  this.x = function(newX){
    if (typeof newX !== 'undefined') {
      //function x() working as a setter
      _x=newX;
    }
    else {
      //function x() working as a getter
      return _x;
    }
  }
}

PHPStorm complains about the function (x()) having inconsistent return points. I found that adding return undefined; just after _x=newX; solves the whine and the code looks like this.

function Point(x,y){
  var _x=x,_y=y;
  this.x = function(newX){
    if (typeof newX !== 'undefined') {
      //function x() working as a setter
      _x=newX;
      return undefined;
    }
    else {
      //function x() working as a getter
      return _x;
    }
  }
}

The question is: Is there a way to make PHPStorm stop whining about this?

Answer 1

Another option would be to annotate the methods return type properly, so that PhpStorm knows that the function is expected to return undefined in some cases.

/**
 * @param {number} [newX]
 * @returns {number|undefined}
 */
this.x = function(newX) {
    // ...
}

Answer 2

you can suppress the warning for this function only, like:

//noinspection FunctionWithInconsistentReturnsJS
    this.x = function(newX){
...
}