makeInMemoryAdapter

makeInMemoryAdapter(options): Adapter

Defined in: packages/@livestore/adapter-web/src/in-memory/in-memory-adapter.ts:107

Creates a web-only in-memory LiveStore adapter.

This adapter runs entirely in memory with no persistence. Ideal for:

• Unit tests and integration tests
• Sandboxes and demos
• Ephemeral sessions where persistence isn’t needed

Characteristics:

• Fast, zero I/O overhead
• Works in all browser contexts: Window, WebWorker, SharedWorker, ServiceWorker
• Supports optional sync backends for real-time collaboration
• No data persists after page reload

For persistent storage, use makePersistedAdapter instead.

Parameters

options

InMemoryAdapterOptions = {}

Returns

Adapter

Examples

import { makeInMemoryAdapter } from '@livestore/adapter-web'

const adapter = makeInMemoryAdapter()

// With sync backend for real-time collaboration
import { makeInMemoryAdapter } from '@livestore/adapter-web'
import { makeWsSync } from '@livestore/sync-cf/client'

const adapter = makeInMemoryAdapter({
  sync: {
    backend: makeWsSync({ url: 'wss://api.example.com/sync' }),
  },
})

// Pre-populate with existing data
const adapter = makeInMemoryAdapter({
  importSnapshot: existingDbSnapshot,
})