useCountDown

介绍

提供倒计时管理能力。

代码演示

基本用法

<span>总时间：{{ current.total }}</span>
<span>剩余天数：{{ current.days }}</span>
<span>剩余小时：{{ current.hours }}</span>
<span>剩余分钟：{{ current.minutes }}</span>
<span>剩余秒数：{{ current.seconds }}</span>
<span>剩余毫秒：{{ current.milliseconds }}</span>

import { useCountDown } from '@vant/use';
export default {
  setup() {
    const countDown = useCountDown({
      // 倒计时 24 小时
      time: 24 * 60 * 60 * 1000,
    });
    // 开始倒计时
    countDown.start();
    return {
      current: countDown.current,
    };
  },
};

毫秒级渲染

倒计时默认每秒渲染一次，设置 millisecond 选项可以开启毫秒级渲染。

import { useCountDown } from '@vant/use';
export default {
  setup() {
    const countDown = useCountDown({
      time: 24 * 60 * 60 * 1000,
      millisecond: true,
    });
    countDown.start();
    return {
      current: countDown.current,
    };
  },
};

API

类型定义

type CurrentTime = {
  days: number;
  hours: number;
  total: number;
  minutes: number;
  seconds: number;
  milliseconds: number;
};
type CountDown = {
  start: () => void;
  pause: () => void;
  reset: (totalTime: number) => void;
  current: ComputedRef<CurrentTime>;
};
type UseCountDownOptions = {
  time: number;
  millisecond?: boolean;
  onChange?: (current: CurrentTime) => void;
  onFinish?: () => void;
};
function useCountDown(options: UseCountDownOptions): CountDown;

参数

返回值

CurrentTime 格式