怎样在 Vue3 中使用 defineComponent 和 ref 实现一个计数器组件
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>