Mouse position right left?

Question

JavaScript

How to determine where the mouse is moving to the right or to the left?
Ideally, you need a script that if the mouse moves to the right, then moves 2 objects to the left by 100px, if the mouse is to the left, then two objects to the right by 100px

Answer 1

(function(d, prevX){
  d.onmousemove = function(e){
       var tX = e.clientX;
       
       if(tX < prevX){
          //Мышь двинулась влево
       }else{
          //Вправо
       }

      prevX = tX;
  }
})(document, 0);

Answer 2

Subscribe to mousemove
Compare current coordinates with those in the past.
Move something there.
jsfiddle.net/43x34xwd