【工具】CountUp.js

作用：实现数字的动画展示效果

---

使用步骤：

1. 安装

   npm i countup.js

2. 导入

   import { CountUp } from 'countUps';

3. HTML结构

   <span ref="countup1Ref">{{ props.number1 }}</span>
   <span ref="countup2Ref">{{ props.number2 }}</span>

4. 创建实例

   const countup1Ref = ref<HTMLElement>();
   const countup2Ref = ref<HTMLElement>();
   onMounted(() => {
     const countup1 = new CountUp(countup1Ref.value!, props.number1, {
       duration: 2, //* 持续时间
     });
     countup1.start();
     const countup2 = new CountUp(countup2Ref.value!, props.number2, {
       duration: 2, //* 持续时间
     });
     countup1.start();
     countup2.start();
   });