怎樣在 Vue3 中使用 defineComponent 和 ref 實現一個計數器組件

Counter.vue

<template>
  <button @click="increment">{{ count }}</button>
</template>

<script lang="ts">
import { defineComponent, ref } from "vue";

export default defineComponent({
  setup() {
    const count = ref(0);
    const increment = () => {
      count.value++;
    };
    return {
      count,
      increment,
    };
  },
});
</script>