JS实现闪动的title消息提醒效果

https://www.jb51.net/article/51297.htm

flashTitle() {
      if (this.notificationFlag || window.location.href.indexOf('chars') === -1) {
        if (this.title_flag) {
          this.title_flag = false
          document.title = '【新订单】'
        } else {
          this.title_flag = true
          document.title = '【　　　】'
        }
      } else {
        document.title = 'title'// 窗口没有消息的时候默认的title内容
        clearInterval(this.flash_title)
      }
    },
    flash_titleIn() {
      clearInterval(this.flash_title)
      this.flash_title = setInterval(() => {
        this.flashTitle()
      }, 2000)
    }