import { ref } from "vue";
export default function () {let a1 = ref(1);let a2 = ref(5);let c = ref(0);function add() {a1.value++;a2.value++;}return {add,a1,a2,c,};
}

<template><div><p>第一个数字{{ a1 }}</p><p>第二个数字{{ a2 }}</p><button @click="add">点击求和</button></div>
</template><script lang="ts" setup>
import useNum from "@/hooks/useNum";const { add, a1, a2 } = useNum();
</script><style scoped></style>