rotary encoder strange behavior (too many datas)

i've corrected my pb with an ugly trick but it works as i need.
it sends through the serial :
1 for clockwise and pulse Green led
-1 for conterclockwise and pulse Red led

function onInit() {
  var step = 0;
  var final = 0;
  require("Encoder").connect(A5, A8, (temp) => {
    step += temp;
    if (Math.floor(step / 4) == step / 4) {
      (step > 0) ? dir = 1: dir = -1;
      step = 0;
      (dir > 0) ?digitalPulse(LED1, 1, 20):digitalPulse(LED2, 1, 20);
      print(dir);
    }
  });
}