Vue.js - 如何與子組件共享父道具？

Question

我試圖弄清楚如何將父組件中的道具傳遞給子組件。

如果我在子組件標簽中添加帶有#id 的 prop 屬性，例如Image cid="488484-49544894-584854"但我想在一個位置（父級）使用相同的cid - 這可能嗎？

父組件和子組件具有相同的掛載和數據功能。 cid被傳遞給contentDeliveryUrl以收集數據。

應用程序.vue

<template>
  <div id="app" class="container" cid="7e4301de-9c6e-4fab-9e68-3031b94d662d">

    <Images cid="same as parent div" />

    <Video cid="same as parent div" />

    <TextType cid="same as parent div" />

    <Card cid="same as parent div" />

  </div>
</template>

<script>
  import axios from 'axios';
  import Images from "./components/Images";
  import Video from "./components/Video";
  import TextType from "./components/TextType";
  import Card from "./components/Card";

  export default {
    name: 'app',
    props: ["cid"],
    components: {
      Images,
      Video,
      TextType,
      Card
    },
    mounted() {
      axios({method: "GET", "url": this.contentDeliveryUrl}).then(result => {
          // eslint-disable-next-line
          this.content = amp.inlineContent(result.data)[0];
          console.log(this.content)
        }, error => {
          console.error(error);
        });
    },
    data() {
      return {
        contentDeliveryUrl: 'https://c1.adis.ws/cms/content/query?fullBodyObject=true&query=%7B%22sys.iri%22%3A%22http%3A%2F%2Fcontent.cms.amplience.com%2F${this.cid}%22%7D&scope=tree&store=testing',
        content: []
      }
    }
  }
</script>

圖片.vue

<template>

<div v-if="content.image">

</div>

</template>

<script>
  import axios from 'axios';

  export default {
    props: ["cid"],
    name:'Images',

    mounted() {
      axios({method: "GET", "url": this.contentDeliveryUrl}).then(result => {
          // eslint-disable-next-line
          this.content = amp.inlineContent(result.data)[0];
          console.log(this.content)
        }, error => {
          console.error(error);
        });
    },
    data() {
      return {
        contentDeliveryUrl: 'https://c1.adis.ws/cms/content/query?fullBodyObject=true&query=%7B%22sys.iri%22%3A%22http%3A%2F%2Fcontent.cms.amplience.com%2F${this.cid}%22%7D&scope=tree&store=testing',
        content: []
      }
    },
}
</script>

使用 Vue Devtools 的所有組件的數據都是未定義的。

Answer 1

例如，添加一個名為cidItem的數據屬性並將其綁定到您的道具，如下所示

<template>
  <div id="app" class="container" :cid="cidItem">

    <Images :cid="cidItem" />

    <Video :cid="cidItem"  />

    <TextType :cid="cidItem"  />

    <Card :cid="cidItem"  />

  </div>
</template>

<script>
  import axios from 'axios';
  import Images from "./components/Images";
  import Video from "./components/Video";
  import TextType from "./components/TextType";
  import Card from "./components/Card";

  export default {
    name: 'app',
    props: ["cid"],
    components: {
      Images,
      Video,
      TextType,
      Card
    },
    mounted() {
      axios({method: "GET", "url": this.contentDeliveryUrl}).then(result => {
          // eslint-disable-next-line
          this.content = amp.inlineContent(result.data)[0];
          console.log(this.content)
        }, error => {
          console.error(error);
        });
    },
    data() {
      return {
        contentDeliveryUrl: 'https://c1.adis.ws/cms/content/query?fullBodyObject=true&query=%7B%22sys.iri%22%3A%22http%3A%2F%2Fcontent.cms.amplience.com%2F${this.cid}%22%7D&scope=tree&store=testing',
        content: [],
        cidItem:'7e4301de-9c6e-4fab-9e68-3031b94d662d'
      }
    }
  }
</script>

由於您的組件具有相同的結構，我建議使用mixins ，創建一個名為myMixins.js的文件並在其中添加以下代碼：

const myMixins = {
 props:['cid'],
  mounted() {
    axios({
      method: "GET",
      "url": this.contentDeliveryUrl
    }).then(result => {
      // eslint-disable-next-line
      this.content = amp.inlineContent(result.data)[0];
      console.log(this.content)
    }, error => {
      console.error(error);
    });
  },
  data() {
    return {
      contentDeliveryUrl: 'https://c1.adis.ws/cms/content/query?fullBodyObject=true&query=%7B%22sys.iri%22%3A%22http%3A%2F%2Fcontent.cms.amplience.com%2F${this.cid}%22%7D&scope=tree&store=testing',
      content: []
    }
  }
}

export default mixins;

並在每個組件內添加：

    import myMixins from './myMixins'
    export default{
          ....
         mixins: [myMixin]
      }