Usage in a Vue project

This is for:

Developer

This article explains how to use the Coveo Atomic library in a Vue.js project.

Tip

For a complete example you may want to start from or refer to throughout this article, see this Vue.js Search Page.

Installation

Installing Atomic in your Vue project is very similar to installing Atomic outside of Vue. However, there are some extra steps if you choose to install Atomic via npm.

CDN

Include the following scripts in the target HTML page:

<script
    type="module"
    src="https://static.cloud.coveo.com/atomic/v2/atomic.esm.js">
</script> 1
<link
    rel="stylesheet"
    href="https://static.cloud.coveo.com/atomic/v2/themes/coveo.css"/> 2
1 The main framework script.
2 The default stylesheet for the framework. While this import is optional, if you don’t import it you’ll need to define its variables yourself.

CDN links are available for the following versions of Atomic releases:

Major: https://static.cloud.coveo.com/atomic/v2/atomic.esm.js

Recommended for development and QA environment purposes. It’s a rather safe way to always have recent features from minor version updates, while not having major breaking changes.

Minor: https://static.cloud.coveo.com/atomic/v2.0/atomic.esm.js

Recommended for production and any customer-facing app. Minor version updates are mostly bug fixes; pointing to a minor version is safe and retrieves patches instantly.

NPM

The library is also available as an npm package.

npm install @coveo/atomic

All of the resources will be available under /node_modules/@coveo/atomic/dist/atomic. You can include those in target pages with <script> tags.

Load Static Assets

For performance reasons, when using the npm installation, the generated Atomic React JavaScript bundle does not automatically include static assets that are loaded on demand. This impacts language support, as well as the use of included SVG icons.

You must make available external assets distributed with Atomic React by including them in the public directory of your app. Without this, you’ll face various issues. For example, labels in the app will appear as temporary placeholders.

The location of the public directory depends on how you build, configure and distribute your app. For example, for any project created with the Vue CLI, this would mean copying language and icon assets to the ./public directory.

cp -r node_modules/@coveo/atomic-react/dist/assets public/assets
cp -r node_modules/@coveo/atomic-react/dist/lang public/lang
Note

Be sure to respect the folder hierarchy, with SVG icons under the assets subdirectory and labels and languages under the lang subdirectory of the public folder.

Update Your Entry File

The Atomic package allows you to customize your components by defining CSS variables in your own stylesheet (see Themes and visual customization).

It also exposes a default theme that you can use as is or build upon. When using npm, you can import the default theme from @coveo/atomic/dist/atomic/themes/coveo.css in your entry .js file as exemplified below.

import '@coveo/atomic/dist/atomic/themes/coveo.css'; 1
import {applyPolyfills, defineCustomElements} from '@coveo/atomic/loader';
import {createApp} from 'vue';
import App from './App.vue';

applyPolyfills().then(() => { 2
  defineCustomElements(window);
});

createApp(App).mount('#app');
1 Optional default themes. While this import is optional, if you don’t import it you’ll need to define its variables yourself.
2 Bind the custom elements to the window object (see Stencil - Vue).

Stencil and Vite Issue

In a Vue project where you have installed Atomic via npm, you may see the following warning.

The above dynamic import cannot be analyzed by Vite.
See link:https://github.com/rollup/plugins/tree/master/packages/dynamic-import-vars#limitations[Rollup limitations^] for supported dynamic import formats. If this is intended to be left as-is, use the /* @vite-ignore */ comment inside the import() call to suppress this warning.

This warning is due to a small issue with Stencil and Vite. It shouldn’t affect your application however, and you can suppress the warning if you prefer.

Configuration

Add the following Vue configuration to handle Atomic components.

// vue.config.js
{
  ...,
  chainWebpack: (config) => { 1
    config.module
      .rule('html')
      .test(/\.html$/)
      .use('html-loader') 2
      .loader('html-loader');
 
    config.module 3
      .rule('vue')
      .use('vue-loader')
      .tap((options) => ({
        ...options,
        compilerOptions: {
          isCustomElement: (tag) => tag.startsWith('atomic-'),
        },
      }));
  }
}
1 Allows for parsing HTML templates, which will be necessary for atomic components that require the native <template> tag.
2 For this configuration to work, you’ll need to add the html-loader dev dependency to your project. 
npm install --save-dev html-loader
3 Tells Vue to treat any components starting with atomic- as native ones. This means Vue won’t try to create Vue components out of them.

Initialize Your Search Interface

After you render your search interface, initialize it as exemplified below. You can do so in any component, but ideally in the app wrapper.

import {onMounted} from 'vue';
 
async function initInterface() {
  await customElements.whenDefined('atomic-search-interface');
  const searchInterface = document.querySelector(
    'atomic-search-interface'
  ) as HTMLAtomicSearchInterfaceElement;
 
  await searchInterface.initialize({ 1
    accessToken: '<YOUR-TOKEN>',
    organizationId: '<YOUR-ORGANIZATION-ID>',
  });
 
  searchInterface.executeFirstSearch(); 2
}
 
onMounted(initInterface); 3
1 Initialization (see Use Components to Create a Search Interface).
2 Triggers the first search.
3 Initializes the interface after the search interface has rendered.

Use the <atomic-result-template> Component

Vue treats the <template> tag as a container for Vue components and therefore doesn’t render it (see Template Refs). This poses an obstacle when working with the <atomic-result-template> component, which expects a native <template> that it will then use to create each result element (see Defining a result template). To get around this, create your result templates in HTML files (as in the following example, with the src/templates/result-template.html file) and then import them as follows.

<!-- .vue component -->
<script setup lang="ts">
  import resultTemplate from '../templates/result-template.html';
</script>
 
<template>
  <atomic-result-list>
    <atomic-result-template v-html="resultTemplate"></atomic-result-template>
  </atomic-result-list>
</template>

Using Custom Components

Writing your own components to leverage Vue components should be as straightforward as using Atomic components on any other page. However, it becomes a bit trickier when you want to use a custom Vue component inside your result templates which, as shown above, need to be passed down as raw HTML.

For example, the example project defines a ResultTextField component, which takes a label and a field as props and renders two Atomic components.

<!-- ResultTextField.vue -->
<script setup lang="ts">
const props = defineProps({
  label: String,
  field: String,
});
</script>
 
<template>
  <atomic-text :value="props.label"></atomic-text>:
  <atomic-result-text :field="props.field"></atomic-result-text>
</template>
Warning

If you tried to use this component in an HTML template as in the following snippet, and then tried to use it in the component further below it, Vue wouldn’t attempt to render it. The reason is that Vue expects only native HTML to be passed via the v-html directive.

<!-- templates/result-template.html -->
<template>
  <atomic-result-fields-list>
  <atomic-field-condition class="field" if-defined="cat_platform">
    <result-text-field label="Platform" field="cat_platform"></result-text-field>
  </atomic-field-condition>
  <atomic-field-condition class="field" if-defined="cat_condition">
    <result-text-field label="Condition" field="cat_condition"></result-text-field>
  </atomic-field-condition>
  <atomic-field-condition class="field" if-defined="cat_categories">
    <result-text-field label="Tags" field="cat_categories"></result-text-field>
  </atomic-field-condition>
</atomic-result-fields-list>
</template>
 <!-- .vue component -->
<script setup lang="ts">
  import resultTemplate from '../templates/result-template.html';
</script>
 
<template>
  <atomic-result-list>
    <atomic-result-template v-html="resultTemplate"></atomic-result-template>
  </atomic-result-list>
</template>
Tip

The solution is to import your component and define it as a custom element in the browser. In your entry main.ts file, make sure to define your element with the Vue helper function and then define it in the browser with the native customElements.define function. By doing this, the snippets above will work and you can use your Vue components in HTML templates.

// src/main.ts
import {defineCustomElement} from 'vue'; 1
import ResultTextField from './components/ResultTextField.vue'; 2
 
const resultTextField = defineCustomElement(ResultTextField);
 
customElements.define('result-text-field', resultTextField); 3
1 Handy helper function that transforms a Vue component into something the browser can use (see defineCustomElement).
2 The custom component you want to use inside your HTML template.
3 Define the custom component in your browser using the browser native customElements.define function.