Vue中用JSON实现刷新界面不影响倒计时

<el-form-item style="overflow:hidden" v-if="env === 'dev'">
 <el-input style="width:180px; float:left" v-model="ruleForm.nucCode" size="small" placeholder="请输入短信验证码" />
 <el-button class="message_btn" @click="getNumCode">
 <span v-if="isShowNucTime" style="font-size:16px" >{{Nuc_time}} S</span>
 <span v-else-if="!isShowNucTime && NucAgain" >重新获取验证码</span>
 <span v-else style="color:#7fbfff" >获取短信验证码</span>
 </el-button>
</el-form-item>

isShowNucTime:boolean = false;
NucAgain: boolean = false;
Nuc_code_freash: boolean = false; // 判断验证码是否过期
Nuc_time: number = 60;
end_time: number = 0;

private getCode() {
 let clicktime = new Date().getTime() + 60000;
 // 本地存储
 localStorage.setItem('myEndTime', JSON.stringify(clicktime));
 this.timeDown(clicktime);
 }

 // 验证码倒计时
 timeDown(counttime: any) {
 // 判断是否正在倒计时
 if (this.isShowNucTime) return;
 this.userChange = false;
 this.isShowNucTime = true;
 this.isGetNucCode = true;
 this.end_time = Number(localStorage.getItem('myEndTime'));
 this.Nuc_time = Math.ceil((this.end_time - new Date().getTime()) / 1000);
 let interval = setInterval(() => {
 this.Nuc_time--;
 if (this.Nuc_time < 1) {
 this.Nuc_time = 60;
 this.isShowNucTime = false;
 localStorage.removeItem('myEndTime');
 if (!this.userChange) {
 this.NucAgain = true;
 }
 clearInterval(interval);
 }
 }, 1000)
 }

private created(): void {
 let myEndTime= localStorage.getItem('myEndTime');
 myEndTime && this.timeDown(myEndTime);
 }