export function debounce(fn, delay) {
  let timer = null;
  return function (...args) {
    if (timer) clearTimeout(timer);
    timer = setTimeout(() => {
      fn.apply(this, args);
    }, delay);
  };
}

export function throttle(fn, delay) {
  let timer = null;
  let last = 0;
  return function (...args) {
    const now = Date.now();
    if (now - last < delay) {
      if (timer) clearTimeout(timer);
      timer = setTimeout(() => {
        last = now;
        fn.apply(this, args);
      }, delay);
    } else {
      last = now;
      fn.apply(this, args);
    }
  };
}