Leveraging x-template in VueJS to create a sub-component within a larger component

I'm having trouble understanding how to properly use x-template for a subcomponent within a VueJS component.

My component, CategoryNav.vue, has a template that uses an x-template to display a list. However, when I render the page, the component created with the x-template is not being recognized. I believe I may be using it incorrectly. Any assistance would be greatly appreciated. Below is the code for my main component.

CategoryNav.vue

<template>
<div class="">
  <menu-list :items="treeList"></menu-list>
</div>
</template>

<script type="text/x-template" id="menu-list-template">
  <ul v-if="items.length">
    <li v-for="item of items">
      <a :href="item.value">{{ item.label }}{{ item.id }}</a>
      <menu-list :items="item.children"></menu-list>
    </li>
  </ul>
</script>
<script>
const MenuList = {
  name: 'menu-list',
  template: '#menu-list-template',
  props: ['items']
}

export default {
  name: 'category-nav',
  components: {
    MenuList
  },
  computed: {
    list () {
      return this.$store.state.topics
    },
    treeList () {
      const items = this.list.map(item => Object.assign({}, item, { children: [] }))
      const byValue = new Map(items.map(item => [item.value, item]))
      const topLevel = []
      for (const item of items) {
        const parent = byValue.get(item.parent)
        if (parent) {
          parent.children.push(item)
        } else {
          topLevel.push(item)
        }
      }
      return topLevel
    }
  }
}
</script>

Answer №1

The solution provided may not be effective. In order for Vue to locate it, the

<script type="text/x-template" id="menu-list-template">
must be present in the DOM, but because it is located outside the <template> section, vue-loader will regard it as a custom block (which will be disregarded by default).

A single *.vue file should contain only one component. It is not advisable to mix x-templates with vue-loader. It is recommended to place each component in a separate *.vue file for precompilation, thereby eliminating the need to include the Vue compiler in the production build.

You have a couple of options:

  1. (Recommended) Extract the sub component into its own *.vue file and then import it into the CategoryNav.vue module.
  2. You can define the sub component entirely within the CategoryNav.vue <script> section, but you cannot have a compiled template. In this case, you would need to specify the render function for it, which can become messy.
  3. Similar to #2, except you can specify the template as a string. However, this would require including the Vue compiler in your production build. If you prefer to use an x-template instead of a string, ensure that the x-template <script> is present in the DOM.

For more information on Vue build files, refer to this link.

Answer №2

The component name 'menu-list' was not properly declared. Here is a revised version:

export default {
  name: 'category-nav',
  components: {
    'menu-list': MenuList
  },
....

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