FPS control with RAF

gistfile1.txt

// http://stackoverflow.com/questions/19764018/controlling-fps-with-requestanimationframe

fpsInterval = 1000 / fps; // 24 for instance
then = Date.now();
update();

function update() {
  requestAnimationFrame(update);

  now = Date.now();
  elapsed = now - then;

  if (elapsed > fpsInterval) {
    then = now - (elapsed % fpsInterval);
  } else {
    return;
  }
  
  // Drawing code...
}