请用javaScript写出防抖和节流函数

防抖函数：

function debounce(fn, wait) {
  let timeout;
  return function() {
    clearTimeout(timeout);
    timeout = setTimeout(() => {
      fn.apply(this, arguments);
    }, wait);
  };
}

节流函数：

function throttle(fn, wait) {
  let inThrottle;
  return function() {
    if (!inThrottle) {
      fn.apply(this, arguments);
      inThrottle = true;
      setTimeout(() => (inThrottle = false), wait);
    }
  };
}