Vue3数值动画（NumberAnimation）

效果如下图：在线预览

APIs

NumberAnimation

Methods

Events

安装依赖：

pnpm add @vueuse/core

创建数值动画组件NumberAnimation.vue

其中引入使用了以下工具函数：

• 数字格式化 formatNumber

<script setup lang="ts">
import { ref, computed, watchEffect, onMounted, watch } from 'vue'
import type { CSSProperties } from 'vue'
import { formatNumber } from '../utils'
import { useTransition, TransitionPresets } from '@vueuse/core'
enum TransitionFunc {
  linear = 'linear',
  easeOutSine = 'easeOutSine',
  easeInOutSine = 'easeInOutSine',
  easeInQuad = 'easeInQuad',
  easeOutQuad = 'easeOutQuad',
  easeInOutQuad = 'easeInOutQuad',
  easeInCubic = 'easeInCubic',
  easeOutCubic = 'easeOutCubic',
  easeInOutCubic = 'easeInOutCubic',
  easeInQuart = 'easeInQuart',
  easeOutQuart = 'easeOutQuart',
  easeInOutQuart = 'easeInOutQuart',
  easeInQuint = 'easeInQuint',
  easeOutQuint = 'easeOutQuint',
  easeInOutQuint = 'easeInOutQuint',
  easeInExpo = 'easeInExpo',
  easeOutExpo = 'easeOutExpo',
  easeInOutExpo = 'easeInOutExpo',
  easeInCirc = 'easeInCirc',
  easeOutCirc = 'easeOutCirc',
  easeInOutCirc = 'easeInOutCirc',
  easeInBack = 'easeInBack',
  easeOutBack = 'easeOutBack',
  easeInOutBack = 'easeInOutBack'
}
interface Props {
  from?: number // 数值动画起始数值
  to?: number // 数值目标值
  duration?: number // 数值动画持续时间，单位 ms
  autoplay?: boolean // 是否自动开始动画
  precision?: number // 精度，保留小数点后几位
  prefix?: string // 前缀
  suffix?: string // 后缀
  separator?: string // 千分位分隔符
  decimal?: string // 小数点字符
  valueStyle?: CSSProperties // 数值文本样式
  transition?: TransitionFunc // 动画过渡效果
}
const props = withDefaults(defineProps<Props>(), {
  from: 0,
  to: 1000,
  duration: 3000,
  autoplay: true,
  precision: 0,
  prefix: undefined,
  suffix: undefined,
  separator: ',',
  decimal: '.',
  valueStyle: () => ({}),
  transition: TransitionFunc['easeInOutCubic']
})
const source = ref(props.from)
watchEffect(() => {
  source.value = props.from
})
watch([() => props.from, () => props.to], () => {
  if (props.autoplay) {
    play()
  }
})
onMounted(() => {
  props.autoplay && play()
})
const outputValue = useTransition(source, {
  duration: props.duration,
  transition: TransitionPresets[props.transition],
  onFinished: () => emits('finished'),
  onStarted: () => emits('started')
})
function play() {
  source.value = props.to
}
const showValue = computed(() => {
  const { precision, separator, decimal, prefix, suffix } = props
  return formatNumber(outputValue.value, precision, separator, decimal, prefix, suffix)
})
const emits = defineEmits(['started', 'finished'])
defineExpose({
  play
})
</script>
<template>
  <span :style="valueStyle">
    {
  
  { showValue }}
  </span>
</template>

在要使用的页面引入

<script setup lang="ts">
import NumberAnimation from 'NumberAnimation.vue'
import { ref } from 'vue'

function onStarted () {
  console.log('started')
}
function onFinished () {
  console.log('finished')
}
const animationRef = ref()
function onClick () {
  animationRef.value.play()
}
</script>
<template>
  <div>
    <h1>NumberAnimation 数值动画</h1>
    <h2 class="mt30 mb10">基本使用</h2>
    <Row>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation :to="100000000.12345" />
        </Statistic>
      </Col>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation :to="100000000.12345" separator="" />
        </Statistic>
      </Col>
    </Row>
    <h2 class="mt30 mb10">精度</h2>
    <Row>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation :from="0.00" :to="100000000.12345" :precision="2" />
        </Statistic>
      </Col>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation :to="100000000.12345" :precision="3"/>
        </Statistic>
      </Col>
    </Row>
    <h2 class="mt30 mb10">自定义前缀 & 后缀</h2>
    <Row>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation
            prefix="$"
            :from="0"
            :to="100000000" />
        </Statistic>
      </Col>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation
            :from="0"
            :to="100000000"
            suffix="元" />
        </Statistic>
      </Col>
    </Row>
    <h2 class="mt30 mb10">自定义样式</h2>
    <Row>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation :value-style="{fontSize: '30px', fontWeight: 600, color: '#d4380d'}" :from="0" :to="100000000"/>
        </Statistic>
      </Col>
    </Row>
    <h2 class="mt30 mb10">自定义播放和动画时间</h2>
    <Row>
      <Col :span="12">
        <Statistic title="一个小目标">
          <NumberAnimation
            ref="animationRef"
            :from="0"
            :to="100000000"
            :duration="5000"
            :precision="2"
            :autoplay="false"
            @started="onStarted"
            @finished="onFinished" />
        </Statistic>
        <Button @click="onClick">播放</Button>
      </Col>
    </Row>
  </div>
</template>