1. 實現程式碼

<template>
 <div>
  {{nowDate}}{{nowWeek}}{{nowTime}}
 </div>
</template>

<script>
export default {
 data(){
  return {
   nowDate: "",// 當前日期
   nowTime: "",// 當前時間
   nowWeek: ""   // 當前星期
  }
 },methods:{
  dealWithTime(data) { // 獲取當前時間
   let formatDateTime;
   let Y = data.getFullYear();
   let M = data.getMonth() + 1;
   let D = data.getDate();
   let H = data.getHours();
   let Min = data.getMinutes();
   let S = data.getSeconds();
   let W = data.getDay();
   H = H < 10 ? "0" + H : H;
   Min = Min < 10 ? "0" + Min : Min;
   S = S < 10 ? "0" + S : S;
   switch (W) {
    case 0:
     W = "日";
     break;
    case 1:
     W = "一";
     break;
    case 2:
     W = "二";
     break;
    case 3:
     W = "三";
     break;
    case 4:
     W = "四";
     break;
    case 5:
     W = "五";
     break;
    case 6:
     W = "六";
     break;
    default:
     break;
   }
   this.nowDate = Y + "年" + M + "月" + D + "日 ";
   this.nowWeek = "周" + W ; 
   this.nowTime = H + ":" + Min + ":" + S;
   // formatDateTime = Y + "年" + M + "月" + D + "日 " + " 周" +W + H + ":" + Min + ":" + S;
  },},mounted() { 
  // 頁面載入完後顯示當前時間
  this.dealWithTime(new Date())
  // 定時重新整理時間
  this.timer = setInterval(()=> {
    this.dealWithTime(new Date()) // 修改資料date
  },500)
 },destroyed() {
  if (this.timer) { // 注意在vue例項銷燬前，清除我們的定時器
   clearInterval(this.timer);
  }
 }
}
</script>

<style lang="scss" scope>

</style>

2. 實現效果

總結

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