Getting started with LiveStore + Vue

Prerequisites

• Recommended: Bun 1.2 or higher
• Node.js 23.0.0 or higher

About Vue integration

Vue integration is still in beta and being incubated as a separate repository. Please direct any issues or contributions to Vue LiveStore

Option A: Quick start

For a quick start, we recommend referencing the playground folder in the Vue LiveStore repository.

Option B: Existing project setup

1. Install dependencies

   It’s strongly recommended to use bun or pnpm for the simplest and most reliable dependency setup (see note on package management for more details).

   bun

   bun install @livestore/livestore@0.4.0-dev.14 @livestore/wa-sqlite@0.4.0-dev.14 @livestore/adapter-web@0.4.0-dev.14 @livestore/utils@0.4.0-dev.14 @livestore/peer-deps@0.4.0-dev.14 @livestore/devtools-vite@0.4.0-dev.14 slashv/vue-livestore@0.4.0-dev.14

   pnpm

   pnpm add @livestore/livestore@0.4.0-dev.14 @livestore/wa-sqlite@0.4.0-dev.14 @livestore/adapter-web@0.4.0-dev.14 @livestore/utils@0.4.0-dev.14 @livestore/peer-deps@0.4.0-dev.14 @livestore/devtools-vite@0.4.0-dev.14 slashv/vue-livestore@0.4.0-dev.14

   npm

   npm install @livestore/livestore@0.4.0-dev.14 @livestore/wa-sqlite@0.4.0-dev.14 @livestore/adapter-web@0.4.0-dev.14 @livestore/utils@0.4.0-dev.14 @livestore/peer-deps@0.4.0-dev.14 @livestore/devtools-vite@0.4.0-dev.14 slashv/vue-livestore@0.4.0-dev.14

2. Update Vite config

   Add the following code to your vite.config.js file:

   import { livestoreDevtoolsPlugin } from '@livestore/devtools-vite'
   
   import { defineConfig } from 'vite'
   import vue from '@vitejs/plugin-vue'
   import vueDevTools from 'vite-plugin-vue-devtools'
   
   export default defineConfig({
     plugins: [
       vue(),
       vueDevTools(),
       livestoreDevtoolsPlugin({ schemaPath: './src/livestore/schema.ts' }),
     ],
     worker: { format: 'es' },
   })

Define Your Schema

Create a file named schema.ts inside the src/livestore folder. This file defines your LiveStore schema consisting of your app’s event definitions (describing how data changes), derived state (i.e. SQLite tables), and materializers (how state is derived from events).

Here’s an example schema:

schema.ts

import { Events, makeSchema, Schema, SessionIdSymbol, State } from '@livestore/livestore'

export const tables = {
  todos: State.SQLite.table({
    name: 'todos',
    columns: {
      id: State.SQLite.text({ primaryKey: true }),
      text: State.SQLite.text({ default: '' }),
      completed: State.SQLite.boolean({ default: false }),
      deletedAt: State.SQLite.integer({ nullable: true, schema: Schema.DateFromNumber }),
    },
  }),
  uiState: State.SQLite.clientDocument({
    name: 'uiState',
    schema: Schema.Struct({ newTodoText: Schema.String, filter: Schema.Literal('all', 'active', 'completed') }),
    default: { id: SessionIdSymbol, value: { newTodoText: '', filter: 'all' } },
  }),
}

export const events = {
  todoCreated: Events.synced({
    name: 'v1.TodoCreated',
    schema: Schema.Struct({ id: Schema.String, text: Schema.String }),
  }),
  todoCompleted: Events.synced({
    name: 'v1.TodoCompleted',
    schema: Schema.Struct({ id: Schema.String }),
  }),
  todoUncompleted: Events.synced({
    name: 'v1.TodoUncompleted',
    schema: Schema.Struct({ id: Schema.String }),
  }),
  todoDeleted: Events.synced({
    name: 'v1.TodoDeleted',
    schema: Schema.Struct({ id: Schema.String, deletedAt: Schema.Date }),
  }),
  todoClearedCompleted: Events.synced({
    name: 'v1.TodoClearedCompleted',
    schema: Schema.Struct({ deletedAt: Schema.Date }),
  }),
  uiStateSet: tables.uiState.set,
}

const materializers = State.SQLite.materializers(events, {
  'v1.TodoCreated': ({ id, text }) => tables.todos.insert({ id, text, completed: false }),
  'v1.TodoCompleted': ({ id }) => tables.todos.update({ completed: true }).where({ id }),
  'v1.TodoUncompleted': ({ id }) => tables.todos.update({ completed: false }).where({ id }),
  'v1.TodoDeleted': ({ id, deletedAt }) => tables.todos.update({ deletedAt }).where({ id }),
  'v1.TodoClearedCompleted': ({ deletedAt }) => tables.todos.update({ deletedAt }).where({ completed: true }),
})

const state = State.SQLite.makeState({ tables, materializers })

export const schema = makeSchema({ events, state })

Create the LiveStore Worker

Create a file named livestore.worker.ts inside the src/livestore folder. This file will contain the LiveStore web worker. When importing this file, make sure to add the ?worker extension to the import path to ensure that Vite treats it as a worker file.

livestore.worker.ts schema.ts

import { makeWorker } from '@livestore/adapter-web/worker'

import { schema } from './schema.ts'

makeWorker({ schema })

import { Events, makeSchema, Schema, SessionIdSymbol, State } from '@livestore/livestore'

export const tables = {
  todos: State.SQLite.table({
    name: 'todos',
    columns: {
      id: State.SQLite.text({ primaryKey: true }),
      text: State.SQLite.text({ default: '' }),
      completed: State.SQLite.boolean({ default: false }),
      deletedAt: State.SQLite.integer({ nullable: true, schema: Schema.DateFromNumber }),
    },
  }),
  uiState: State.SQLite.clientDocument({
    name: 'uiState',
    schema: Schema.Struct({ newTodoText: Schema.String, filter: Schema.Literal('all', 'active', 'completed') }),
    default: { id: SessionIdSymbol, value: { newTodoText: '', filter: 'all' } },
  }),
}

export const events = {
  todoCreated: Events.synced({
    name: 'v1.TodoCreated',
    schema: Schema.Struct({ id: Schema.String, text: Schema.String }),
  }),
  todoCompleted: Events.synced({
    name: 'v1.TodoCompleted',
    schema: Schema.Struct({ id: Schema.String }),
  }),
  todoUncompleted: Events.synced({
    name: 'v1.TodoUncompleted',
    schema: Schema.Struct({ id: Schema.String }),
  }),
  todoDeleted: Events.synced({
    name: 'v1.TodoDeleted',
    schema: Schema.Struct({ id: Schema.String, deletedAt: Schema.Date }),
  }),
  todoClearedCompleted: Events.synced({
    name: 'v1.TodoClearedCompleted',
    schema: Schema.Struct({ deletedAt: Schema.Date }),
  }),
  uiStateSet: tables.uiState.set,
}

const materializers = State.SQLite.materializers(events, {
  'v1.TodoCreated': ({ id, text }) => tables.todos.insert({ id, text, completed: false }),
  'v1.TodoCompleted': ({ id }) => tables.todos.update({ completed: true }).where({ id }),
  'v1.TodoUncompleted': ({ id }) => tables.todos.update({ completed: false }).where({ id }),
  'v1.TodoDeleted': ({ id, deletedAt }) => tables.todos.update({ deletedAt }).where({ id }),
  'v1.TodoClearedCompleted': ({ deletedAt }) => tables.todos.update({ deletedAt }).where({ completed: true }),
})

const state = State.SQLite.makeState({ tables, materializers })

export const schema = makeSchema({ events, state })

Add the LiveStore Provider

To make the LiveStore available throughout your app, wrap your app’s root component with the LiveStoreProvider component from vue-livestore. This provider manages your app’s data store, loading, and error states.

Here’s an example:

<script setup lang="ts">
import { makePersistedAdapter } from '@livestore/adapter-web'
import LiveStoreSharedWorker from '@livestore/adapter-web/shared-worker?sharedworker'
import LiveStoreWorker from './livestore/livestore.worker.ts?worker'
import { schema } from './livestore/schema'
import { LiveStoreProvider } from 'vue-livestore'
import ToDos from './components/to-dos.vue'

const adapter = makePersistedAdapter({
  storage: { type: 'opfs' },
  worker: LiveStoreWorker,
  sharedWorker: LiveStoreSharedWorker,
})

const storeOptions = {
  schema,
  adapter,
  storeId: 'test_store',
}
</script>

<template>
  <LiveStoreProvider :options="storeOptions">
    <template #loading>
      <div>Loading LiveStore...</div>
    </template>
    <ToDos />
  </LiveStoreProvider>
</template>

Commit events

After wrapping your app with the LiveStoreProvider, you can use the useStore hook from any component to commit events.

Here’s an example:

<script setup lang="ts">
import { ref } from 'vue'
import { events } from '../livestore/schema'
const { store } = useStore()

const newTodoText = ref('')

// Events
const createTodo = () => {
  store.commit(events.todoCreated({ id: crypto.randomUUID(), text: newTodoText.value }))
  newTodoText.value = ''
}
</script>

<template>
  <div>
    <input v-model="newTodoText" />
    <button @click="createTodo">Create</button>
  </div>
</template>

Queries

To retrieve data from the database, first define a query using queryDb from @livestore/livestore. Then, execute the query with the useQuery hook from @livestore/react.

Consider abstracting queries into a separate file to keep your code organized, though you can also define them directly within components if preferred.

Here’s an example:

<script setup lang="ts">
import { queryDb } from '@livestore/livestore'
import { useQuery } from 'vue-livestore'
import { events, tables } from '../livestore/schema'

const visibleTodos$ = queryDb(
  () => tables.todos.where({ deletedAt: null }),
  { label: 'visibleTodos' },
)

const todos = useQuery(visibleTodos$)
</script>

<template>
  <div>
    <ul>
      <li v-for="todo in todos" :key="todo.id">
        {{ todo.text }}
      </li>
    </ul>
  </div>
</template>