Vue.js"超出最大调用堆栈大小"错误.将数据从父级传递到子级失败

Question

我无法将数据从父级传递给子级.我正在使用道具,也试过返回数据 - 没有运气.我有一个面板组件(它是父组件)与数据和panelBody组件(子)

小组如下:

<template>
  <div id="panel">
    <div class="panel">
      <ul>
        <li v-for="shelf in shelfs">
          <panel-body :shelf="shelf" :selected.sync="selected"></panel-body>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import PanelBody from '../components/PanelBody'
export default {
  name: 'panel-body',
  components: {
    'panel-body': PanelBody
  },
  data: () => ({
    shelfs: [{
      name: 'shelf 1',
      books: [{
        title: 'Lorem ipum'
      }, {
        title: 'Dolor sit amet'
      }]
    }, {
      name: 'shelf 2',
      books: [{
        title: 'Ipsum lorem'
      }, {
        title: 'Amet sit dolor'
      }]
    }],
    selected: {}
  })
}
</script>

<style scoped>
a {
  color: #42b983;
}
</style>

我的面板是:

<template>
  <div id="panel-body">
    <a href="#" v-on:click.prevent.stop="select">{{ shelf.name }}</a>
    <ul v-show="isSelected">
      <li v-for="book in shelf.books">{{ book.title }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  name: 'panel-body',
  props: ['shelf', 'selected'],
  computed: {
    isSelected: function () {
      return this.selected === this.shelf
    }
  },
  methods: {
    select: function () {
      this.selected = this.shelf
    }
  }
}
</script>

<style scoped>
a {
  color: #42b983;
}
</style>

请帮忙!无法找出错误"vue.esm.js？65d7:3877 Uncaught RangeError:超出最大调用堆栈大小".当我删除数据时,一切都像它应该的那样.

Answer 1

你有错误的原因

超出最大调用堆栈大小

是因为这个

import PanelBody from '../components/PanelBody'
export default {
  name: 'panel-body',
  components: {
    'panel-body': PanelBody
  },

您定义了Panel组件name: 'panel-body'.将其更改为name: 'panel',您将删除循环引用.

评论中提到的其他问题和其他答案通常也适用.以下是组件的工作版本.

Panel.vue

<template>
  <div id="panel">
    <div class="panel">
      <ul>
        <li v-for="shelf in shelfs">
          <panel-body :shelf="shelf" :key="shelf.name" :selected.sync="selected"></panel-body>
        </li>
      </ul>
    </div>
    {{selected}}
  </div>
</template>

<script>
import PanelBody from './PanelBody.vue'
export default {
  name: 'panel',
  components: {
    'panel-body': PanelBody
  },
  data(){
    return {
    shelfs: [{
      name: 'shelf 1',
      books: [{
        title: 'Lorem ipum'
      }, {
        title: 'Dolor sit amet'
      }]
    }, {
      name: 'shelf 2',
      books: [{
        title: 'Ipsum lorem'
      }, {
        title: 'Amet sit dolor'
      }]
    }],
    selected: {}

    }
  }
}
</script>

<style scoped>
a {
  color: #42b983;
}
</style>

PanelBody.vue

<template>
  <div id="panel-body">
    <a href="#" v-on:click.prevent.stop="select">{{ shelf.name }}</a>
    <ul v-show="isSelected">
      <li v-for="book in shelf.books">{{ book.title }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  name: 'panel-body',
  props: ['shelf', 'selected'],
  data(){
    return {
      internalSelected: null
    }
  },
  computed: {
    isSelected: function () {
      return this.internalSelected === this.shelf
    }
  },
  methods: {
    select: function () {
      this.internalSelected = this.shelf
      this.$emit("update:selected", this.internalSelected)
    }
  }
}
</script>

<style scoped>
a {
  color: #42b983;
}
</style>

我想再注意一件事.由于PanelBody中的这一行,Vue会发出一个警告,指出你正在直接改变道具.通常,您应该存储要变异的属性的本地副本.我已经更新了上面的代码来做到这一点.this.selected = this.shelf

Answer 2

您所在的 Vue 的名称不应与您要导入的组件的名称相同。

就我而言

<template>
 <div>
    <SingleStandard></SingleStandard>
 </div>
</template>

<script>
    import SingleStandard from '../components/SingleStandard';

    export default {
      name: 'SingleStandard',
      components: { SingleStandard },
    };
</script>

上面的代码导致了同样的问题，但是当我更改导出组件的名称时它起作用了。

<template>
 <div>
    <SingleStandard></SingleStandard>
 </div>
</template>

<script>
    import SingleStandard from '../components/SingleStandard';

    export default {
      name: 'SingleStandardView', <-------------
      components: { SingleStandard },
    };
</script>

请检查所有未来人的命名约定:)