vue3的state方式传递参数
在Vue 3中,可以使用setup()函数和reactiveref来创建和管理状态(state)。如果你想在组件之间传递参数,可以使用propsemit
下面是一个简单的示例,演示如何在Vue 3中通过状态传递参数:
1.
创建一个父组件(ParentComponent):
2.
vue复制代码
<template>
<div>
<input v-model="message" type="text" placeholder="Enter message">
<button @click="sendMessage">Send</button>
<ChildComponent :message="message" @received="handleReceived"/>
</div>
</template>
<script>
import { ref } from 'vue';
import ChildComponent from './ChildComponent.vue';
export default {
components: {
ChildComponent
},
setup() {
const message = ref('');
const sendMessage = () => {
message.value = 'Hello from ParentComponent!';
vue中reactive
};
const handleReceived = (receivedMessage) => {
console.log('Received from ChildComponent:', receivedMessage);
};
return { message, sendMessage, handleReceived };
}
};
</script>
1.
创建一个子组件(ChildComponent):
2.
vue复制代码
<template>
<div>
<p>{{ message }}</p>
<button @click="sendBack">Send Back</button>
</div>
</template>
<script>
export default {
props: ['message'],
setup() {
const sendBack = () => {
const receivedMessage = 'Hello from ChildComponent!';
console.log('Sending back to ParentComponent:', receivedMessage);
// 传递参数回父组件
this.$emit('received', receivedMessage);
};
return { sendBack };
}
};

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