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uni_modules/wot-design-uni/components/wd-count-down/index.scss

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+@import '../common/abstracts/variable';
+@import '../common/abstracts/mixin';
+
+.wot-theme-dark {
+  @include b(count-down) {
+    color: $-dark-color;
+  }
+}
+
+
+@include b(count-down) {
+  color: $-count-down-text-color;
+  font-size: $-count-down-font-size;
+  line-height: $-count-down-line-height;
+}

uni_modules/wot-design-uni/components/wd-count-down/types.ts

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+import type { ComponentPublicInstance, ExtractPropTypes } from 'vue'
+import { baseProps, makeBooleanProp, makeRequiredProp, makeStringProp } from '../common/props'
+
+export const countDownProps = {
+  ...baseProps,
+  /**
+   * 倒计时时长，单位毫秒
+   */
+  time: makeRequiredProp(Number),
+  /**
+   * 是否开启毫秒
+   */
+  millisecond: makeBooleanProp(false),
+  /**
+   * 格式化时间
+   */
+  format: makeStringProp('HH:mm:ss'),
+  /**
+   * 是否自动开始
+   */
+  autoStart: makeBooleanProp(true)
+}
+
+export type CountDownProps = ExtractPropTypes<typeof countDownProps>
+
+export type CountDownExpose = {
+  /**
+   * 开始倒计时
+   */
+  start: () => void
+  /**
+   * 暂停倒计时
+   */
+  pause: () => void
+  /**
+   * 重设倒计时，若 auto-start 为 true，重设后会自动开始倒计时
+   */
+  reset: () => void
+}
+
+export type CountDownInstance = ComponentPublicInstance<CountDownProps, CountDownExpose>

uni_modules/wot-design-uni/components/wd-count-down/utils.ts

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+import { padZero } from '../common/util'
+
+export type TimeData = {
+  days: number
+  hours: number
+  minutes: number
+  seconds: number
+  milliseconds: number
+}
+
+export function parseFormat(format: string, timeData: TimeData): string {
+  const { days } = timeData
+  let { hours, minutes, seconds, milliseconds } = timeData
+
+  if (format.includes('DD')) {
+    format = format.replace('DD', padZero(days))
+  } else {
+    hours += days * 24
+  }
+
+  if (format.includes('HH')) {
+    format = format.replace('HH', padZero(hours))
+  } else {
+    minutes += hours * 60
+  }
+
+  if (format.includes('mm')) {
+    format = format.replace('mm', padZero(minutes))
+  } else {
+    seconds += minutes * 60
+  }
+
+  if (format.includes('ss')) {
+    format = format.replace('ss', padZero(seconds))
+  } else {
+    milliseconds += seconds * 1000
+  }
+
+  if (format.includes('S')) {
+    const ms = padZero(milliseconds, 3)
+
+    if (format.includes('SSS')) {
+      format = format.replace('SSS', ms)
+    } else if (format.includes('SS')) {
+      format = format.replace('SS', ms.slice(0, 2))
+    } else {
+      format = format.replace('S', ms.charAt(0))
+    }
+  }
+
+  return format
+}

uni_modules/wot-design-uni/components/wd-count-down/wd-count-down.vue

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+<template>
+  <view :class="`wd-count-down ${customClass}`" :style="customStyle">
+    <slot :current="current" v-if="$slots.default" />
+    <block v-else>{{ timeText }}</block>
+  </view>
+</template>
+
+<script lang="ts">
+export default {
+  name: 'wd-count-down',
+  options: {
+    virtualHost: true,
+    addGlobalClass: true,
+    styleIsolation: 'shared'
+  }
+}
+</script>
+
+<script setup lang="ts">
+import { watch, computed, onMounted } from 'vue'
+import { parseFormat } from './utils'
+import { useCountDown } from '../composables/useCountDown'
+import { countDownProps, type CountDownExpose } from './types'
+
+const props = defineProps(countDownProps)
+
+const emit = defineEmits(['change', 'finish'])
+
+const { start, pause, reset, current } = useCountDown({
+  time: props.time,
+  millisecond: props.millisecond,
+  onChange: (current) => emit('change', current),
+  onFinish: () => emit('finish')
+})
+
+const timeText = computed(() => parseFormat(props.format, current.value))
+
+const resetTime = () => {
+  reset(props.time)
+  if (props.autoStart) {
+    start()
+  }
+}
+
+watch(() => props.time, resetTime, { immediate: false })
+
+onMounted(() => {
+  resetTime()
+})
+
+defineExpose<CountDownExpose>({
+  start,
+  pause,
+  reset: resetTime
+})
+</script>
+
+<style lang="scss" scoped>
+@import './index.scss';
+</style>