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<template>
<div class="counter">
<button @click="subtract()">-</button>
<pre>{{ count }}</pre>
<button @click="add()">+</button>
</div>
<div class="counter-message">
<slot />
</div>
</template>
<script>
import { ref } from 'vue';
export default {
setup() {
const count = ref(0);
const add = () => (count.value = count.value + 1);
const subtract = () => (count.value = count.value - 1);
return {
count,
add,
subtract,
};
},
};
</script>
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