animationFrame.js

gistfile1.txt

const animationFrame = timestamp => {
    if (!this.startTime) {
      this.startTime = timestamp;
    }

    this.delta = timestamp - this.startTime;

    if (this.delta >= updateDiff) {
      this.update(this.delta);
      this.startTime = 0;
    }

    window.requestAnimationFrame(this.animationFrame);
  };