防抖函数和节流函数

/**
 * 防抖函数
 * @param {*} fn
 * @param {*} wait
 * @returns
 */
export const Debounce = (fn, wait = 500) => {
  let timer
  return function () {
    const args = arguments
    if (timer) {
      clearTimeout(timer)
    }
    timer = setTimeout(() => {
      timer = null
      fn.apply(this, args)
    }, wait)
  }
}

/**
 * 节流函数
 * @param {*} fn
 * @param {*} wait
 * @returns
 */
export const Throttle = (fn, wait = 3000) => {
  let last, deferTimer
  return function () {
    var _args = arguments
    var _this = this
    var now = +new Date()

    clearTimeout(deferTimer)
    if (last && now < last + wait) {
      deferTimer = setTimeout(function () {
        last = now
        fn.apply(_this, _args)
      }, wait)
    } else {
      last = now
      fn.apply(_this, _args)
    }
  }
}