export function throttle(func, wait) {
  let timeout
  return function () {
    let that = this
    let args = arguments

    if (!timeout) {
      timeout = setTimeout(() => {
        timeout = null
        func.apply(that, args)
      }, wait)
    }
  }
}

/**
 * 利用 document.title 做新消息提示
 * @export
 * @param {Number} count
 */
export function titleNotify(count) {
  const hasNewMessage = count > 0
  if (hasNewMessage) {
    if (document.title.search(/\((.*?)\)/) >= 0) {
      document.title = document.title.replace(/\((.*?)\)/, `(${count > 99 ? '99+' : count})`)
    } else {
      document.title = `(${count})${document.title}`
    }
  } else {
    document.title = document.title.replace(/\((.*?)\)/, '')
  }
}