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Wire in data

Learn how to wire in data to your UI component

So far, we have created isolated stateless components-–great for Storybook, but ultimately not helpful until we give them some data in our app.

This tutorial doesn’t focus on the particulars of building an app, so we won’t dig into those details here. But we will take a moment to look at a common pattern for wiring in data with container components.

Container components

Our TaskList component as currently written is “presentational” in that it doesn’t talk to anything external to its own implementation. To get data into it, we need a “container”.

This example uses Vuex, Vue's default data management library, to build a straightforward data model for our app. However, the pattern used here applies just as well to other data management libraries like Apollo and MobX.

Add the necessary dependency to your project with:

yarn add vuex@next --save

First, we'll create a simple Vuex store that responds to actions that change the task's state in a file called store.js in the src directory (intentionally kept simple):

import { createStore } from 'vuex';

const defaultTasks = [
  { id: '1', title: 'Something', state: 'TASK_INBOX' },
  { id: "2", title: 'Something more', state: 'TASK_INBOX' },
  { id: "3", title: 'Something else', state: 'TASK_INBOX' },
  { id: "4", title: 'Something again', state: 'TASK_INBOX' },

export default createStore({
  state: {
    tasks: defaultTasks,
    status: 'idle',
    error: null,
  mutations: {
    ARCHIVE_TASK(state, id) {
      state.tasks.find(task => === id).state = 'TASK_ARCHIVED';
    PIN_TASK(state, id) {
      state.tasks.find(task => === id).state = 'TASK_PINNED';
  actions: {
    archiveTask({ commit }, id) {
      commit('ARCHIVE_TASK', id);
    pinTask({ commit }, id) {
      commit('PIN_TASK', id);

Then we'll update our TaskList to read data out of the store. First, let's move our existing presentational version to the file src/components/PureTaskList.vue (renaming the component to PureTaskList) and wrap it with a container.

In src/components/PureTaskList.vue:

  <!-- same content as before -->

  import Task from './Task';
  export default {
    name: 'PureTaskList',
    // same content as before

In src/components/TaskList.vue:

  <PureTaskList :tasks="tasks" @archive-task="archiveTask" @pin-task="pinTask" />

  import PureTaskList from './PureTaskList';

  import { computed } from 'vue';

  import { useStore } from 'vuex';

  export default {
    components: { PureTaskList },
    name: 'TaskList',
    setup() {
      //👇 Creates a store instance
      const store = useStore();

      //👇 Retrieves the tasks from the store's state
      const tasks = computed(() => store.state.tasks);

      //👇 Dispatches the actions back to the store
      const archiveTask = task => store.dispatch('archiveTask', task);
      const pinTask = task => store.dispatch('pinTask', task);

      return {

The reason to keep the presentational version of the TaskList separate is that it is easier to test and isolate. As it doesn't rely on the presence of a store, it is much easier to deal with from a testing perspective. Let's rename src/components/TaskList.stories.js into src/components/PureTaskList.stories.js and ensure our stories use the presentational version:

+ import PureTaskList from './PureTaskList.vue';

import * as TaskStories from './Task.stories';

export default {
+ component: PureTaskList,
+ title: 'PureTaskList',
  decorators: [
    () => ({ template: '<div style="margin: 3em;"><story/></div>' }),
  argTypes: {
    onPinTask: {},
    onArchiveTask: {},

const Template = (args, { argTypes }) => ({
+ components: { PureTaskList },
 setup() {
    return { args, ...TaskStories.actionsData };
+ template: '<PureTaskList v-bind="args" />',

export const Default = Template.bind({});
Default.args = {
  // Shaping the stories through args composition.
  // The data was inherited from the Default story in task.stories.js.
  tasks: [
    { ...TaskStories.Default.args.task, id: '1', title: 'Task 1' },
    { ...TaskStories.Default.args.task, id: '2', title: 'Task 2' },
    { ...TaskStories.Default.args.task, id: '3', title: 'Task 3' },
    { ...TaskStories.Default.args.task, id: '4', title: 'Task 4' },
    { ...TaskStories.Default.args.task, id: '5', title: 'Task 5' },
    { ...TaskStories.Default.args.task, id: '6', title: 'Task 6' },

export const WithPinnedTasks = Template.bind({});
WithPinnedTasks.args = {
  // Shaping the stories through args composition.
  // Inherited data coming from the Default story.
  tasks: [
    ...Default.args.tasks.slice(0, 5),
    { id: '6', title: 'Task 6 (pinned)', state: 'TASK_PINNED' },

export const Loading = Template.bind({});
Loading.args = {
  tasks: [],
  loading: true,

export const Empty = Template.bind({});
Empty.args = {
  // Shaping the stories through args composition.
  // Inherited data coming from the Loading story.
  loading: false,
💡 Don't forget to commit your changes with git!

Now that we have some actual data populating our component, obtained from the Vuex store, we could have wired it to src/App.vue and render the component there. Don't worry about it. We'll take care of it in the next chapter.

Keep your code in sync with this chapter. View 022ac7c on GitHub.
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