react---倒计时

import store from "../store"; //数据存储

export const trans = (times) => {
    times = times / 1000;
    let hours;
    let minutes;
    let seconds;

    hours = Math.floor(times / 60 / 60 / 60);
    minutes = Math.floor(times / 60 % 60);
    seconds = Math.floor(times % 60);
    return hours + ":" + minutes + ":" + seconds;
}

export const setTimes = () => {
    let time = setTimeout(() => {
        if (store.times <= 0) {
            clearTimeout(time);
            //刷新 或不做操作
        } else {
            store.setStoreTimes();
            setTimes();
        }
    }, 1000)
}

在react中使用，
//引入

import { trans, setTimes } from "../../store/utils";

//在第一次渲染后调用

componentDidMount() {
    setTimes(store.times);
  }

// 移除之前，清除定时器

  componentwillUnmount() {
    clearTimeout(times);
  }

//显示

  <span className="times">
          {trans(store.times)}
 </span>