Component nesting is not supported; cannot render a component inside a

I've set up a simple Vue application within Rails, but I am encountering an issue:

hello_vue.js:

import Vue from 'vue/dist/vue.esm'
import TurbolinksAdapter from 'vue-turbolinks'
Vue.use(TurbolinksAdapter)

import CollectionSet from '../collection_set.vue'

document.addEventListener('turbolinks:load', () => {
  const app = new Vue({
    el: '#app',
    components: { CollectionSet }
  })
})

collection_set.vue:

<script>
import Collectable from './collectable.vue'
export default {
  components: { Collectable }
}
</script>

<template>
  <p>test</p>
  <collectable />
</template>

collectable.vue:

<script>
export default {
  name: 'collectable'
}
</script>
<template>
  <p>test 2</p>
</template>

my webpage:

<div id="app"><collection-set /></div>

However, when I view my webpage with the setup above, I don't see anything displayed. Strangely, if I remove <collectable /> from collection_set.vue, then I can see the text "test". Interestingly, there are no errors being thrown.

Does anyone know why collectable is not rendering as expected?

Answer №1

To fix the error in collection_set.vue, modify the template code as shown below:

<template>
 <div>
    <p>test</p>
  <collectable />
</div>
</template>

The reason for the error was that the

Component template should contain exactly one root element
. We were attempting to have two root elements - p and collectable.

By enclosing the code within a parent div, the error was resolved. Feel free to test it out and let me know if it solves the issue.

An additional tip is to always check the browser console in developer tools to diagnose potential issues. In this case, the console provided the precise error message, leading to the identification of the problem during code compilation.

Answer №2

Vue requires that every component contains a single root element, such as <p> or <div>, within which all of your template code should be placed.

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