<!-- Child.vue -->
<script setup lang="ts">
const model = defineModel({ type: Number, required: true });
const total = defineModel("total", { type: Number, required: true });

function update() {
  model.value++;
}
</script>

<template>
  <div>Child model is: {{ model }}</div>
  {{ total }}
  <q-btn @click="update">Add +</q-btn>
</template>
