Vuejs 2将prop对象传递给子组件并进行检索 [英] Vuejs 2 Passing prop object to child component and retrieving

问题描述

我想知道如何使用props和检索将对象传递给子组件。我了解如何将其作为属性，但是如何传递对象并从子组件中检索对象？当我从子组件中使用this.props时，会得到未定义或错误消息。

I was wondering how to pass an object to a child component using props and retrieving. I understand how to do it as attributes but how to pass an object and retrieve the object from the child component? When I use this.props from the child component I get undefined or an error message.

父组件

 <template>
        <div>
        <child-component :v-bind="props"></child-component>     
        </div>
    </template>

<script>
import ChildComponent from "ChildComponent.vue";

export default {
    name: 'ParentComponent',
    mounted() {

    },
     props: {
       firstname: 'UserFirstName',
       lastname: 'UserLastName'
       foo:'bar'
    },
    components: {
    ChildComponent
    },
    methods: {

      }
}
</script>

<style scoped>
</style>

儿童部分

<script>
<template>
   <div>
   </div>
</template>
export default {
    name: 'ChildComponent',
    mounted() {
    console.log(this.props)
  }  
}
</script>

推荐答案

很简单：

父组件：

<template>
  <div>
    <my-component :propObj="anObject"></my-component>     
  </div>
</template>

<script>
import ChildComponent from "ChildComponent.vue";

export default {
    name: 'ParentComponent',
    mounted() { },
    props: {
       anObject: Object
    },
    components: {
      ChildComponent
    },
}
</script>

<style scoped>
</style>

子组件：

export default {
  props: {
    // type, required and default are optional, you can reduce it to 'options: Object'
    propObj: { type: Object, required: false, default: {"test": "wow"}},
  }
}

这应该可行！

还请查看道具文档：

https://vuejs.org/v2/guide/components.html#Props

如果要按照注释中的指示将数据从子级发送到父级，则必须使用事件或查看同步功能在2.3 +

If you want to sent data from the child to the parent as was already pointed in the comments you have to use events or take a look at 'sync' feature which is available in 2.3 +

https://vuejs.org/v2/guide/components.html#sync-Modifier

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