网页标题/标签 闪烁

实现

let beforeTitle = document.title; // 原标签
let count = 0; // 切换title
function blinkNewMsg(val) {
  document.title =
    count % 2 == 0 ? `【　　　】${beforeTitle}` : `【${val}】${beforeTitle}`;
  count++;
}
setInterval(() => {
  blinkNewMsg('新消息');
}, 1000);