Code
vue3
<script setup>
import { ref } from "vue";
const props = defineProps({
msg: { type: String, default: "Hello" }
});
const count = ref(0);
</script>
<template>
<h1>{{ props.msg }}</h1>
<button @click="count++">Count: {{ count }}</button>
</template>
<style scoped>
h1 { color: #42b883; }
</style>