Mapping DOM elements to VueJS components for hydration is a key process in facilitating

Question

Mapping DOM elements to VueJS components for hydration is a key process in facilitating

I have a specific requirement and I am exploring potential solutions using VueJS, as it offers the convenient feature of hydrating pre-rendered HTML from the server.

In my Vue components, I do not define a template within the .vue file, but I need them to attach (hydrate) to DOM elements seamlessly. My only concern is how to attach child components in this context.

Could you provide an example?

<div class="page-component">
 <h1 v-text="pageTitle">Page Title</h1>

 <div class="child-component">
  <h2 v-text="childTitle">Child Title</h2>
 </div>
</div>

I have two components: PageComponent, responsible for handling the v-text in the h1 element within the root DOM element with the class .page-component, and ChildComponent, which should attach to the DOM element with the class .child-component and deal with the v-text in the h2 element.

Currently, I am struggling to understand how to achieve this without explicitly defining a matching template in the .vue file. While I see that server-side rendering (SSR) with the vue SSR render package handles this correctly, I am looking for a way to create templateless components that utilize the rendered content from any server (note: I use a Java server and cannot rely on the npm SSR package). Additionally, I want to ensure that these components are attached correctly to their respective sections within the complete HTML document.

I attempted a solution where I instantiated a PageComponent and mounted it like this: new PageComponent().$mount('.page-component'). However, this approach led to issues when trying to interpolate Vue-related attributes, such as the v-text directives, resulting in conflicts with the ChildComponent's properties.

In conclusion, I am seeking a method to instruct the PageComponent to delegate interpolation control to a child component at a specific point in the DOM subtree, rather than attempting to handle interpolation independently.

I trust that my scenario is now clearer.

javascript vue.js vue-component

Answer 1

Answer №1

If my understanding is correct, you aim to deliver an HTML page from your Java server (without using Vue SSR) and then "hydrate" it on the client side with Vue components without duplicating the HTML structure in the component templates (referred to as "templateless").

Additionally, you want dynamic data to be sourced from each component without explicitly defining everything in the top-level component (expecting it to pass control for interpolation to a child component).

However, according to Vue's Component Slots documentation linked here, compilation (interpolation) occurs where the components are used:

Everything in the parent template is compiled in the parent scope; everything in the child template is compiled in the child scope.

In your code example, this means that Vue requires both `pageTitle` and `childTitle` variables to be defined within your "page-component" Component (as data, props, computed properties, etc.)

Unless Scoped Slots are utilized, which have a specific syntax like shown below:

Vue.component('my-child-component', {
  template: '<div><slot :childTitle="myChildTitle"></slot></div>',
  data() {
    return {
      myChildTitle: 'Child Title from my-child-component',
    };
  },
});

function activateVue() {
  new Vue({
    el: '#app',
    data: {
      pageTitle: 'Page Title from page-component',
    },
  });
}

<button onclick="if (typeof Vue === 'undefined') {alert('Vue is not loaded yet');} else {activateVue();}">Activate Vue</button>

<div class="page-component" id="app">
  <h1 v-text="pageTitle">Page Title from server</h1>

  <div class="child-component" is="my-child-component">
    <div slot-scope="{childTitle}">
      <h2 v-text="childTitle">Child Title from server</h2>
    </div>
  </div>
</div>

<script src="https://unpkg.com/vue@^2.5"></script>

Answer 2

If my understanding is correct, you aim to deliver an HTML page from your Java server (without using Vue SSR) and then "hydrate" it on the client side with Vue components without duplicating the HTML structure in the component templates (referred to as "templateless").

Additionally, you want dynamic data to be sourced from each component without explicitly defining everything in the top-level component (expecting it to pass control for interpolation to a child component).

However, according to Vue's Component Slots documentation linked here, compilation (interpolation) occurs where the components are used:

Everything in the parent template is compiled in the parent scope; everything in the child template is compiled in the child scope.

In your code example, this means that Vue requires both `pageTitle` and `childTitle` variables to be defined within your "page-component" Component (as data, props, computed properties, etc.)

Unless Scoped Slots are utilized, which have a specific syntax like shown below:

Vue.component('my-child-component', {
  template: '<div><slot :childTitle="myChildTitle"></slot></div>',
  data() {
    return {
      myChildTitle: 'Child Title from my-child-component',
    };
  },
});

function activateVue() {
  new Vue({
    el: '#app',
    data: {
      pageTitle: 'Page Title from page-component',
    },
  });
}

<button onclick="if (typeof Vue === 'undefined') {alert('Vue is not loaded yet');} else {activateVue();}">Activate Vue</button>

<div class="page-component" id="app">
  <h1 v-text="pageTitle">Page Title from server</h1>

  <div class="child-component" is="my-child-component">
    <div slot-scope="{childTitle}">
      <h2 v-text="childTitle">Child Title from server</h2>
    </div>
  </div>
</div>

<script src="https://unpkg.com/vue@^2.5"></script>

Mapping DOM elements to VueJS components for hydration is a key process in facilitating

Answer №1

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