<template>
<!-- 父组件 -->
<div class="parent">
<Child :num="count" @handle="changeValue" />
<button @click="add">父组件的按钮</button>
</div>
</template>
<script lang="ts">
import Child from 'https://www.cnblogs.com/qt-fei/p/components/child.vue'
import { defineComponent, reactive, toRefs } from 'vue'
export default defineComponent({
name: '',
props: {},
components: { Child },
setup () {
const state = reactive({
count: 1
})
const add = (): void => {
state.count += 1
}
const changeValue = (num: number) => {
state.count += num
}
return {
...toRefs(state),
add,
changeValue
}
}
})
</script>
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