element-plus的 Statistic 统计组件也有数字滚动的效果,其实就是用vueuse的useTransition
useTransition 文档地址:vueuse.org/core/useTra…
vueuse 确实是个宝藏库,在此强烈推荐。
npm i @vueuse/core
组件具有3 个参数:
- num: 显示的数字
- duration: 动画持续时间,默认 1000
- precision: 数字精度,默认 0
<MoCountTo :num="198" />
<MoCountTo :num="198" :duration="2000" :precision="2" />
MoCountTo组件代码
组件代码的实现很简单,如下:
<template>
<span> {{ formattedOutputValue }}</span>
</template>
<script setup lang="ts">
import { ref, watch, nextTick, computed } from 'vue'
import { useTransition } from '@vueuse/core'
interface Props {
num: number
duration?: number
precision?: number // 数字精度
}
const props = defineProps<Props>()
const source = ref(0)
let outputValue = useTransition(source, {
duration: props.duration || 1000
})
const precision = ref(
props.precision !== undefined && Number.isInteger(props.precision) ? props.precision : 0
)
const formattedOutputValue = computed(() => outputValue.value.toFixed(precision.value))
watch(
() => props.num,
async (newVal) => {
if (Number.isNaN(newVal)) {
console.warn('Invalid number provided, defaulting to 0.')
newVal = 0
}
await nextTick()
source.value = newVal
},
{ immediate: true }
)
</script>
项目地址
本项目GIT地址:github.com/lucidity99/…