throttle-fps.js

function throttle(callback, fps = 60) {
  const frameTime = 1000 / fps;
  let lastTime = window.performance.now();
    
  return function run() {
        window.requestAnimationFrame(run);
      
        const currentTime = window.performance.now();
        const elapsedTime = currentTime - lastTime;
    
        if (elapsedTime < frameTime) return;
        else callback();
        
        lastTime = currentTime - elapsedTime % frameTime;
  };
}