From fb77323ef2c81f16d72ea85f3f6c39cacee83701 Mon Sep 17 00:00:00 2001
From: Steve Ruiz <steveruizok@gmail.com>
Date: Fri, 5 Nov 2021 14:13:14 +0000
Subject: [PATCH] [feature] filesystem + readonly (#218)

* Fix escape key for menu

* Adds filesystem support, readonly mode

* Move file system events to external hook

* Adds onSignIn callback, prevent event by default
---
 example/esbuild.config.mjs                    |  27 +-
 example/package.json                          |   8 +-
 example/src/app.tsx                           |   7 +
 example/src/components/editor.tsx             |  22 +-
 example/src/index.html                        |   4 +-
 example/src/readonly.tsx                      |   6 +
 packages/tldraw/scripts/build.js              |   2 +
 packages/tldraw/scripts/dev.js                |   1 +
 packages/tldraw/src/TLDraw.test.tsx           |  22 +-
 packages/tldraw/src/TLDraw.tsx                |  98 ++++-
 .../components/ContextMenu/ContextMenu.tsx    |   4 +-
 .../src/components/DropdownMenu/DMContent.tsx |   4 +-
 .../components/ToolsPanel/PrimaryTools.tsx    |  14 +-
 .../src/components/TopPanel/ColorMenu.tsx     |   1 -
 .../tldraw/src/components/TopPanel/Menu.tsx   | 147 ++++----
 .../src/components/TopPanel/SizeMenu.tsx      |   2 +-
 .../src/components/TopPanel/TopPanel.tsx      |   7 +-
 packages/tldraw/src/hooks/index.ts            |   2 +
 packages/tldraw/src/hooks/useFileSystem.ts    |  49 +++
 .../tldraw/src/hooks/useFileSystemHandlers.ts |  45 +++
 .../tldraw/src/hooks/useKeyboardShortcuts.tsx |  45 ++-
 .../tldraw/src/hooks/useTLDrawContext.tsx     |  12 +-
 packages/tldraw/src/index.ts                  |   1 +
 .../state/data/browser-fs-access/index.d.ts   |  99 ++++++
 .../src/state/data/browser-fs-access/index.js | 334 ++++++++++++++++++
 .../tldraw/src/state/data/filesystem.spec.ts  |  10 +
 packages/tldraw/src/state/data/filesystem.ts  | 101 ++++++
 .../tldraw/src/state/data/migrate.spec.ts     |  15 +
 .../tldraw/src/state/{ => data}/migrate.ts    |   9 +-
 packages/tldraw/src/state/tlstate.ts          | 134 +++++--
 packages/tldraw/src/test/migration.spec.ts    |  35 --
 packages/tldraw/src/test/mock-document.tsx    |   1 +
 .../tldraw/src/test/renderWithContext.tsx     |   2 +-
 packages/tldraw/src/types.ts                  |  11 +
 www/components/editor.tsx                     |  12 +-
 www/hooks/useFileSystem.ts                    |  43 +++
 yarn.lock                                     |   4 +-
 37 files changed, 1132 insertions(+), 208 deletions(-)
 create mode 100644 example/src/readonly.tsx
 create mode 100644 packages/tldraw/src/hooks/useFileSystem.ts
 create mode 100644 packages/tldraw/src/hooks/useFileSystemHandlers.ts
 create mode 100644 packages/tldraw/src/state/data/browser-fs-access/index.d.ts
 create mode 100644 packages/tldraw/src/state/data/browser-fs-access/index.js
 create mode 100644 packages/tldraw/src/state/data/filesystem.spec.ts
 create mode 100644 packages/tldraw/src/state/data/filesystem.ts
 create mode 100644 packages/tldraw/src/state/data/migrate.spec.ts
 rename packages/tldraw/src/state/{ => data}/migrate.ts (90%)
 delete mode 100644 packages/tldraw/src/test/migration.spec.ts
 create mode 100644 www/hooks/useFileSystem.ts

diff --git a/example/esbuild.config.mjs b/example/esbuild.config.mjs
index 398a8f1ae..fe792d001 100644
--- a/example/esbuild.config.mjs
+++ b/example/esbuild.config.mjs
@@ -3,8 +3,6 @@ import fs from 'fs'
 import esbuild from 'esbuild'
 import serve, { error, log } from 'create-serve'
 
-const isDevServer = true
-
 if (!fs.existsSync('./dist')) {
   fs.mkdirSync('./dist')
 }
@@ -16,17 +14,18 @@ fs.copyFile('./src/index.html', './dist/index.html', (err) => {
 esbuild
   .build({
     entryPoints: ['src/index.tsx'],
-    bundle: true,
-    outfile: 'dist/bundle.js',
+    outfile: 'dist/index.js',
     minify: false,
+    bundle: true,
     sourcemap: true,
-    incremental: isDevServer,
-    target: ['chrome58', 'firefox57', 'safari11', 'edge18'],
+    incremental: true,
+    format: 'esm',
+    target: 'esnext',
     define: {
       'process.env.LIVEBLOCKS_PUBLIC_API_KEY': process.env.LIVEBLOCKS_PUBLIC_API_KEY,
-      'process.env.NODE_ENV': isDevServer ? '"development"' : '"production"',
+      'process.env.NODE_ENV': '"development"',
     },
-    watch: isDevServer && {
+    watch: {
       onRebuild(err) {
         serve.update()
         err ? error('❌ Failed') : log('✅ Updated')
@@ -35,10 +34,8 @@ esbuild
   })
   .catch(() => process.exit(1))
 
-if (isDevServer) {
-  serve.start({
-    port: 5000,
-    root: './dist',
-    live: true,
-  })
-}
+serve.start({
+  port: 5000,
+  root: './dist',
+  live: true,
+})
diff --git a/example/package.json b/example/package.json
index 1aacc3729..ddb48fbe3 100644
--- a/example/package.json
+++ b/example/package.json
@@ -18,11 +18,9 @@
     "src"
   ],
   "sideEffects": false,
-  "peerDependencies": {
-    "react": ">=16.8",
-    "react-dom": "^16.8 || ^17.0"
-  },
   "devDependencies": {
+    "react": ">=16.8",
+    "react-dom": "^16.8 || ^17.0",
     "@liveblocks/client": "^0.12.1",
     "@liveblocks/react": "^0.12.1",
     "@tldraw/tldraw": "^0.1.2",
@@ -39,4 +37,4 @@
     "typescript": "4.2.3"
   },
   "gitHead": "a7dac0f83ad998e205c2aab58182cb4ba4e099a6"
-}
+}
\ No newline at end of file
diff --git a/example/src/app.tsx b/example/src/app.tsx
index 3efc230d9..a69944d7d 100644
--- a/example/src/app.tsx
+++ b/example/src/app.tsx
@@ -1,6 +1,7 @@
 import * as React from 'react'
 import { Switch, Route, Link } from 'react-router-dom'
 import Basic from './basic'
+import ReadOnly from './readonly'
 import Controlled from './controlled'
 import Imperative from './imperative'
 import Embedded from './embedded'
@@ -16,6 +17,9 @@ export default function App(): JSX.Element {
         <Route path="/basic">
           <Basic />
         </Route>
+        <Route path="/readonly">
+          <ReadOnly />
+        </Route>
         <Route path="/controlled">
           <Controlled />
         </Route>
@@ -39,6 +43,9 @@ export default function App(): JSX.Element {
             <li>
               <Link to="/basic">basic</Link>
             </li>
+            <li>
+              <Link to="/readonly">readonly</Link>
+            </li>
             <li>
               <Link to="/controlled">controlled</Link>
             </li>
diff --git a/example/src/components/editor.tsx b/example/src/components/editor.tsx
index 5d519bec1..0286fa6c4 100644
--- a/example/src/components/editor.tsx
+++ b/example/src/components/editor.tsx
@@ -1,9 +1,11 @@
 import * as React from 'react'
-import { TLDraw, TLDrawProps, TLDrawState } from '@tldraw/tldraw'
+import { TLDraw, TLDrawProps, TLDrawState, useFileSystem } from '@tldraw/tldraw'
 
 export default function Editor(props: TLDrawProps): JSX.Element {
   const rTLDrawState = React.useRef<TLDrawState>()
 
+  const fileSystemEvents = useFileSystem()
+
   const handleMount = React.useCallback((state: TLDrawState) => {
     rTLDrawState.current = state
     props.onMount?.(state)
@@ -12,9 +14,25 @@ export default function Editor(props: TLDrawProps): JSX.Element {
     window.tlstate = state
   }, [])
 
+  const onSignIn = React.useCallback((state: TLDrawState) => {
+    // Sign in?
+  }, [])
+
+  const onSignOut = React.useCallback((state: TLDrawState) => {
+    // Sign out?
+  }, [])
+
   return (
     <div className="tldraw">
-      <TLDraw id="tldraw1" {...props} onMount={handleMount} autofocus />
+      <TLDraw
+        id="tldraw1"
+        {...props}
+        onMount={handleMount}
+        onSignIn={onSignIn}
+        onSignOut={onSignOut}
+        {...fileSystemEvents}
+        autofocus
+      />
     </div>
   )
 }
diff --git a/example/src/index.html b/example/src/index.html
index c7ceedfe8..1da2d34e1 100644
--- a/example/src/index.html
+++ b/example/src/index.html
@@ -2,14 +2,14 @@
 <html lang="en">
   <head>
     <meta charset="utf-8" />
-    <link rel="stylesheet" href="bundle.css" />
+    <link rel="stylesheet" href="index.css" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>tldraw</title>
   </head>
   <body>
     <div id="root"></div>
     <noscript>You need to enable JavaScript to run this app.</noscript>
-    <script type="module" src="./bundle.js"></script>
+    <script type="module" src="./index.js"></script>
     <!--
       This HTML file is a template.
       If you open it directly in the browser, you will see an empty page.
diff --git a/example/src/readonly.tsx b/example/src/readonly.tsx
new file mode 100644
index 000000000..b565df34e
--- /dev/null
+++ b/example/src/readonly.tsx
@@ -0,0 +1,6 @@
+import * as React from 'react'
+import Editor from './components/editor'
+
+export default function Basic(): JSX.Element {
+  return <Editor readOnly />
+}
diff --git a/packages/tldraw/scripts/build.js b/packages/tldraw/scripts/build.js
index 62db8f97b..d57de0887 100644
--- a/packages/tldraw/scripts/build.js
+++ b/packages/tldraw/scripts/build.js
@@ -41,6 +41,7 @@ async function main() {
         'perfect-freehand',
         'rko',
         'react-hotkeys-hook',
+        'browser-fs-access',
       ],
       metafile: true,
     })
@@ -74,6 +75,7 @@ async function main() {
         'perfect-freehand',
         'rko',
         'react-hotkeys-hook',
+        'browser-fs-access',
       ],
       metafile: true,
     })
diff --git a/packages/tldraw/scripts/dev.js b/packages/tldraw/scripts/dev.js
index e3c2e49f9..bc0db7fe1 100644
--- a/packages/tldraw/scripts/dev.js
+++ b/packages/tldraw/scripts/dev.js
@@ -33,6 +33,7 @@ async function main() {
       'perfect-freehand',
       'rko',
       'react-hotkeys-hook',
+      'browser-fs-access',
     ],
     sourcemap: true,
     incremental: true,
diff --git a/packages/tldraw/src/TLDraw.test.tsx b/packages/tldraw/src/TLDraw.test.tsx
index ab258ef27..ed2127f77 100644
--- a/packages/tldraw/src/TLDraw.test.tsx
+++ b/packages/tldraw/src/TLDraw.test.tsx
@@ -1,29 +1,17 @@
 import * as React from 'react'
-import { render } from '@testing-library/react'
+import { render, waitFor } from '@testing-library/react'
 import { TLDraw } from './TLDraw'
 
 describe('tldraw', () => {
-  test('mounts component without crashing', () => {
-    render(<TLDraw />)
-  })
-
-  test('mounts component and calls onMount', (done) => {
+  test('mounts component and calls onMount', async () => {
     const onMount = jest.fn()
     render(<TLDraw onMount={onMount} />)
-    // The call is asynchronous: it won't be called until the next tick.
-    setTimeout(() => {
-      expect(onMount).toHaveBeenCalled()
-      done()
-    }, 100)
+    await waitFor(onMount)
   })
 
-  test('mounts component and calls onMount when id is present', (done) => {
+  test('mounts component and calls onMount when id is present', async () => {
     const onMount = jest.fn()
     render(<TLDraw id="someId" onMount={onMount} />)
-    // The call is asynchronous: it won't be called until the next tick.
-    setTimeout(() => {
-      expect(onMount).toHaveBeenCalled()
-      done()
-    }, 100)
+    await waitFor(onMount)
   })
 })
diff --git a/packages/tldraw/src/TLDraw.tsx b/packages/tldraw/src/TLDraw.tsx
index 1e0e782e6..033a86180 100644
--- a/packages/tldraw/src/TLDraw.tsx
+++ b/packages/tldraw/src/TLDraw.tsx
@@ -4,7 +4,13 @@ import { Renderer } from '@tldraw/core'
 import styled, { dark } from '~styles'
 import { Data, TLDrawDocument, TLDrawStatus, TLDrawUser } from '~types'
 import { TLDrawState } from '~state'
-import { TLDrawContext, useCustomFonts, useKeyboardShortcuts, useTLDrawContext } from '~hooks'
+import {
+  TLDrawContext,
+  TLDrawContextType,
+  useCustomFonts,
+  useKeyboardShortcuts,
+  useTLDrawContext,
+} from '~hooks'
 import { shapeUtils } from '~shape-utils'
 import { ToolsPanel } from '~components/ToolsPanel'
 import { TopPanel } from '~components/TopPanel'
@@ -85,6 +91,11 @@ export interface TLDrawProps {
    */
   showUI?: boolean
 
+  /**
+   * (optional) Whether to the document should be read only.
+   */
+  readOnly?: boolean
+
   /**
    * (optional) A callback to run when the component mounts.
    */
@@ -95,6 +106,33 @@ export interface TLDrawProps {
    */
   onChange?: TLDrawState['_onChange']
 
+  /**
+   * (optional) A callback to run when the user creates a new project through the menu or through a keyboard shortcut.
+   */
+  onNewProject?: (state: TLDrawState, e?: KeyboardEvent) => void
+  /**
+   * (optional) A callback to run when the user saves a project through the menu or through a keyboard shortcut.
+   */
+  onSaveProject?: (state: TLDrawState, e?: KeyboardEvent) => void
+  /**
+   * (optional) A callback to run when the user saves a project as a new project through the menu or through a keyboard shortcut.
+   */
+  onSaveProjectAs?: (state: TLDrawState, e?: KeyboardEvent) => void
+  /**
+   * (optional) A callback to run when the user opens new project through the menu or through a keyboard shortcut.
+   */
+  onOpenProject?: (state: TLDrawState, e?: KeyboardEvent) => void
+  /**
+   * (optional) A callback to run when the user signs in via the menu.
+   */
+  onSignIn?: (state: TLDrawState) => void
+  /**
+   * (optional) A callback to run when the user signs out via the menu.
+   */
+  onSignOut?: (state: TLDrawState) => void
+  /**
+   * (optional) A callback to run when the user creates a new project.
+   */
   onUserChange?: (state: TLDrawState, user: TLDrawUser) => void
 }
 
@@ -109,26 +147,68 @@ export function TLDraw({
   showZoom = true,
   showStyles = true,
   showUI = true,
+  readOnly = false,
   onMount,
   onChange,
   onUserChange,
+  onNewProject,
+  onSaveProject,
+  onSaveProjectAs,
+  onOpenProject,
+  onSignOut,
+  onSignIn,
 }: TLDrawProps) {
   const [sId, setSId] = React.useState(id)
 
   const [tlstate, setTlstate] = React.useState(
     () => new TLDrawState(id, onMount, onChange, onUserChange)
   )
-  const [context, setContext] = React.useState(() => ({ tlstate, useSelector: tlstate.useStore }))
+  const [context, setContext] = React.useState<TLDrawContextType>(() => ({
+    tlstate,
+    useSelector: tlstate.useStore,
+    callbacks: {
+      onNewProject,
+      onSaveProject,
+      onSaveProjectAs,
+      onOpenProject,
+      onSignIn,
+      onSignOut,
+    },
+  }))
 
   React.useEffect(() => {
     if (id === sId) return
+
     // If a new id is loaded, replace the entire state
+    setSId(id)
     const newState = new TLDrawState(id, onMount, onChange, onUserChange)
     setTlstate(newState)
-    setContext({ tlstate: newState, useSelector: newState.useStore })
-    setSId(id)
+    setContext((ctx) => ({
+      ...ctx,
+      tlstate: newState,
+      useSelector: newState.useStore,
+    }))
   }, [sId, id])
 
+  // Update the callbacks when any callback changes
+  React.useEffect(() => {
+    setContext((ctx) => ({
+      ...ctx,
+      callbacks: {
+        onNewProject,
+        onSaveProject,
+        onSaveProjectAs,
+        onOpenProject,
+        onSignIn,
+        onSignOut,
+      },
+    }))
+  }, [onNewProject, onSaveProject, onSaveProjectAs, onOpenProject, onSignIn, onSignOut])
+
+  React.useEffect(() => {
+    tlstate.readOnly = readOnly
+  }, [tlstate, readOnly])
+
   // Use the `key` to ensure that new selector hooks are made when the id changes
   return (
     <TLDrawContext.Provider value={context}>
@@ -145,6 +225,7 @@ export function TLDraw({
           showZoom={showZoom}
           showTools={showTools}
           showUI={showUI}
+          readOnly={readOnly}
         />
       </IdProvider>
     </TLDrawContext.Provider>
@@ -161,6 +242,7 @@ interface InnerTLDrawProps {
   showStyles: boolean
   showUI: boolean
   showTools: boolean
+  readOnly: boolean
   document?: TLDrawDocument
 }
 
@@ -173,6 +255,7 @@ function InnerTldraw({
   showZoom,
   showStyles,
   showTools,
+  readOnly,
   showUI,
   document,
 }: InnerTLDrawProps) {
@@ -250,12 +333,12 @@ function InnerTldraw({
         <Renderer
           id={id}
           containerRef={rWrapper}
+          shapeUtils={shapeUtils}
           page={page}
           pageState={pageState}
           snapLines={snapLines}
           users={users}
           userId={tlstate.state.room?.userId}
-          shapeUtils={shapeUtils}
           theme={theme}
           meta={meta}
           hideBounds={hideBounds}
@@ -322,13 +405,14 @@ function InnerTldraw({
           ) : (
             <>
               <TopPanel
+                readOnly={readOnly}
                 showPages={showPages}
                 showMenu={showMenu}
-                showZoom={showZoom}
                 showStyles={showStyles}
+                showZoom={showZoom}
               />
               <StyledSpacer />
-              {showTools && <ToolsPanel />}
+              {showTools && !readOnly && <ToolsPanel />}
             </>
           )}
         </StyledUI>
diff --git a/packages/tldraw/src/components/ContextMenu/ContextMenu.tsx b/packages/tldraw/src/components/ContextMenu/ContextMenu.tsx
index ae2486798..98d563918 100644
--- a/packages/tldraw/src/components/ContextMenu/ContextMenu.tsx
+++ b/packages/tldraw/src/components/ContextMenu/ContextMenu.tsx
@@ -41,6 +41,8 @@ const hasGroupSelectedSelector = (s: Data) => {
   )
 }
 
+const preventDefault = (e: Event) => e.stopPropagation()
+
 interface ContextMenuProps {
   children: React.ReactNode
 }
@@ -118,7 +120,7 @@ export const ContextMenu = ({ children }: ContextMenuProps): JSX.Element => {
   return (
     <RadixContextMenu.Root>
       <RadixContextMenu.Trigger dir="ltr">{children}</RadixContextMenu.Trigger>
-      <RadixContextMenu.Content dir="ltr" ref={rContent} asChild>
+      <RadixContextMenu.Content dir="ltr" ref={rContent} onEscapeKeyDown={preventDefault} asChild>
         <MenuContent>
           {hasSelection ? (
             <>
diff --git a/packages/tldraw/src/components/DropdownMenu/DMContent.tsx b/packages/tldraw/src/components/DropdownMenu/DMContent.tsx
index b55f10b31..90721ad56 100644
--- a/packages/tldraw/src/components/DropdownMenu/DMContent.tsx
+++ b/packages/tldraw/src/components/DropdownMenu/DMContent.tsx
@@ -9,9 +9,11 @@ export interface DMContentProps {
   children: React.ReactNode
 }
 
+const preventDefault = (e: Event) => e.stopPropagation()
+
 export function DMContent({ children, align, variant }: DMContentProps): JSX.Element {
   return (
-    <Content sideOffset={8} dir="ltr" asChild align={align}>
+    <Content sideOffset={8} dir="ltr" asChild align={align} onEscapeKeyDown={preventDefault}>
       <StyledContent variant={variant}>{children}</StyledContent>
     </Content>
   )
diff --git a/packages/tldraw/src/components/ToolsPanel/PrimaryTools.tsx b/packages/tldraw/src/components/ToolsPanel/PrimaryTools.tsx
index 7e4182449..adfe18cd6 100644
--- a/packages/tldraw/src/components/ToolsPanel/PrimaryTools.tsx
+++ b/packages/tldraw/src/components/ToolsPanel/PrimaryTools.tsx
@@ -53,7 +53,7 @@ export const PrimaryTools = React.memo((): JSX.Element => {
       <ToolButtonWithTooltip
         kbd={'2'}
         label={'select'}
-        onSelect={selectSelectTool}
+        onClick={selectSelectTool}
         isActive={activeTool === 'select'}
       >
         <CursorArrowIcon />
@@ -61,7 +61,7 @@ export const PrimaryTools = React.memo((): JSX.Element => {
       <ToolButtonWithTooltip
         kbd={'2'}
         label={TLDrawShapeType.Draw}
-        onSelect={selectDrawTool}
+        onClick={selectDrawTool}
         isActive={activeTool === TLDrawShapeType.Draw}
       >
         <Pencil1Icon />
@@ -69,7 +69,7 @@ export const PrimaryTools = React.memo((): JSX.Element => {
       <ToolButtonWithTooltip
         kbd={'3'}
         label={TLDrawShapeType.Rectangle}
-        onSelect={selectRectangleTool}
+        onClick={selectRectangleTool}
         isActive={activeTool === TLDrawShapeType.Rectangle}
       >
         <SquareIcon />
@@ -77,7 +77,7 @@ export const PrimaryTools = React.memo((): JSX.Element => {
       <ToolButtonWithTooltip
         kbd={'4'}
         label={TLDrawShapeType.Draw}
-        onSelect={selectEllipseTool}
+        onClick={selectEllipseTool}
         isActive={activeTool === TLDrawShapeType.Ellipse}
       >
         <CircleIcon />
@@ -85,7 +85,7 @@ export const PrimaryTools = React.memo((): JSX.Element => {
       <ToolButtonWithTooltip
         kbd={'5'}
         label={TLDrawShapeType.Arrow}
-        onSelect={selectArrowTool}
+        onClick={selectArrowTool}
         isActive={activeTool === TLDrawShapeType.Arrow}
       >
         <ArrowTopRightIcon />
@@ -93,7 +93,7 @@ export const PrimaryTools = React.memo((): JSX.Element => {
       <ToolButtonWithTooltip
         kbd={'6'}
         label={TLDrawShapeType.Text}
-        onSelect={selectTextTool}
+        onClick={selectTextTool}
         isActive={activeTool === TLDrawShapeType.Text}
       >
         <TextIcon />
@@ -101,7 +101,7 @@ export const PrimaryTools = React.memo((): JSX.Element => {
       <ToolButtonWithTooltip
         kbd={'7'}
         label={TLDrawShapeType.Sticky}
-        onSelect={selectStickyTool}
+        onClick={selectStickyTool}
         isActive={activeTool === TLDrawShapeType.Sticky}
       >
         <Pencil2Icon />
diff --git a/packages/tldraw/src/components/TopPanel/ColorMenu.tsx b/packages/tldraw/src/components/TopPanel/ColorMenu.tsx
index 5be276985..f58a73341 100644
--- a/packages/tldraw/src/components/TopPanel/ColorMenu.tsx
+++ b/packages/tldraw/src/components/TopPanel/ColorMenu.tsx
@@ -9,7 +9,6 @@ import { BoxIcon } from '~components/icons'
 import { ToolButton } from '~components/ToolButton'
 
 const selectColor = (s: Data) => s.appState.selectedStyle.color
-
 const preventEvent = (e: Event) => e.preventDefault()
 
 export const ColorMenu = React.memo((): JSX.Element => {
diff --git a/packages/tldraw/src/components/TopPanel/Menu.tsx b/packages/tldraw/src/components/TopPanel/Menu.tsx
index ad0e4c8cc..962f4c79c 100644
--- a/packages/tldraw/src/components/TopPanel/Menu.tsx
+++ b/packages/tldraw/src/components/TopPanel/Menu.tsx
@@ -5,26 +5,23 @@ import { useTLDrawContext } from '~hooks'
 import { PreferencesMenu } from './PreferencesMenu'
 import { DMItem, DMContent, DMDivider, DMSubMenu, DMTriggerIcon } from '~components/DropdownMenu'
 import { SmallIcon } from '~components/SmallIcon'
+import { useFileSystemHandlers } from '~hooks'
 
-export const Menu = React.memo(() => {
-  const { tlstate } = useTLDrawContext()
+interface MenuProps {
+  readOnly: boolean
+}
 
-  const handleNew = React.useCallback(() => {
-    if (window.confirm('Are you sure you want to start a new project?')) {
-      tlstate.newProject()
-    }
-  }, [tlstate])
+export const Menu = React.memo(({ readOnly }: MenuProps) => {
+  const { tlstate, callbacks } = useTLDrawContext()
 
-  const handleSave = React.useCallback(() => {
-    tlstate.saveProject()
-  }, [tlstate])
+  const { onNewProject, onOpenProject, onSaveProject, onSaveProjectAs } = useFileSystemHandlers()
 
-  const handleLoad = React.useCallback(() => {
-    tlstate.loadProject()
+  const handleSignIn = React.useCallback(() => {
+    callbacks.onSignIn?.(tlstate)
   }, [tlstate])
 
   const handleSignOut = React.useCallback(() => {
-    tlstate.signOut()
+    callbacks.onSignOut?.(tlstate)
   }, [tlstate])
 
   const handleCopy = React.useCallback(() => {
@@ -51,60 +48,90 @@ export const Menu = React.memo(() => {
     tlstate.deselectAll()
   }, [tlstate])
 
+  const showFileMenu =
+    callbacks.onNewProject ||
+    callbacks.onOpenProject ||
+    callbacks.onSaveProject ||
+    callbacks.onSaveProjectAs
+
+  const showSignInOutMenu = callbacks.onSignIn || callbacks.onSignOut
+
   return (
     <DropdownMenu.Root>
       <DMTriggerIcon>
         <HamburgerMenuIcon />
       </DMTriggerIcon>
       <DMContent variant="menu">
-        <DMSubMenu label="File...">
-          <DMItem onSelect={handleNew} kbd="#N">
-            New Project
-          </DMItem>
-          <DMItem disabled onSelect={handleLoad} kbd="#L">
-            Open...
-          </DMItem>
-          <DMItem disabled onSelect={handleSave} kbd="#S">
-            Save
-          </DMItem>
-          <DMItem disabled onSelect={handleSave} kbd="⇧#S">
-            Save As...
-          </DMItem>
-        </DMSubMenu>
-        <DMSubMenu label="Edit...">
-          <DMItem onSelect={tlstate.undo} kbd="#Z">
-            Undo
-          </DMItem>
-          <DMItem onSelect={tlstate.redo} kbd="#⇧Z">
-            Redo
-          </DMItem>
-          <DMDivider dir="ltr" />
-          <DMItem onSelect={handleCopy} kbd="#C">
-            Copy
-          </DMItem>
-          <DMItem onSelect={handlePaste} kbd="#V">
-            Paste
-          </DMItem>
-          <DMDivider dir="ltr" />
-          <DMItem onSelect={handleCopySvg} kbd="#⇧C">
-            Copy as SVG
-          </DMItem>
-          <DMItem onSelect={handleCopyJson}>Copy as JSON</DMItem>
-          <DMDivider dir="ltr" />
-          <DMItem onSelect={handleSelectAll} kbd="#A">
-            Select All
-          </DMItem>
-          <DMItem onSelect={handleDeselectAll}>Select None</DMItem>
-        </DMSubMenu>
-        <DMDivider dir="ltr" />
+        {showFileMenu && (
+          <DMSubMenu label="File...">
+            {callbacks.onNewProject && (
+              <DMItem onSelect={onNewProject} kbd="#N">
+                New Project
+              </DMItem>
+            )}
+            {callbacks.onOpenProject && (
+              <DMItem onSelect={onOpenProject} kbd="#L">
+                Open...
+              </DMItem>
+            )}
+            {callbacks.onSaveProject && (
+              <DMItem onSelect={onSaveProject} kbd="#S">
+                Save
+              </DMItem>
+            )}
+            {callbacks.onSaveProjectAs && (
+              <DMItem onSelect={onSaveProjectAs} kbd="⇧#S">
+                Save As...
+              </DMItem>
+            )}
+          </DMSubMenu>
+        )}
+        {!readOnly && (
+          <>
+            {' '}
+            <DMSubMenu label="Edit...">
+              <DMItem onSelect={tlstate.undo} kbd="#Z">
+                Undo
+              </DMItem>
+              <DMItem onSelect={tlstate.redo} kbd="#⇧Z">
+                Redo
+              </DMItem>
+              <DMDivider dir="ltr" />
+              <DMItem onSelect={handleCopy} kbd="#C">
+                Copy
+              </DMItem>
+              <DMItem onSelect={handlePaste} kbd="#V">
+                Paste
+              </DMItem>
+              <DMDivider dir="ltr" />
+              <DMItem onSelect={handleCopySvg} kbd="#⇧C">
+                Copy as SVG
+              </DMItem>
+              <DMItem onSelect={handleCopyJson}>Copy as JSON</DMItem>
+              <DMDivider dir="ltr" />
+              <DMItem onSelect={handleSelectAll} kbd="#A">
+                Select All
+              </DMItem>
+              <DMItem onSelect={handleDeselectAll}>Select None</DMItem>
+            </DMSubMenu>
+            <DMDivider dir="ltr" />
+          </>
+        )}
         <PreferencesMenu />
-        <DMDivider dir="ltr" />
-        <DMItem disabled onSelect={handleSignOut}>
-          Sign Out
-          <SmallIcon>
-            <ExitIcon />
-          </SmallIcon>
-        </DMItem>
+        {showSignInOutMenu && (
+          <>
+            <DMDivider dir="ltr" />{' '}
+            {callbacks.onSignIn && <DMItem onSelect={handleSignOut}>Sign In</DMItem>}
+            {callbacks.onSignOut && (
+              <DMItem onSelect={handleSignOut}>
+                Sign Out
+                <SmallIcon>
+                  <ExitIcon />
+                </SmallIcon>
+              </DMItem>
+            )}
+          </>
+        )}
       </DMContent>
     </DropdownMenu.Root>
   )
diff --git a/packages/tldraw/src/components/TopPanel/SizeMenu.tsx b/packages/tldraw/src/components/TopPanel/SizeMenu.tsx
index bed32df51..e3fb9d905 100644
--- a/packages/tldraw/src/components/TopPanel/SizeMenu.tsx
+++ b/packages/tldraw/src/components/TopPanel/SizeMenu.tsx
@@ -2,7 +2,7 @@ import * as React from 'react'
 import * as DropdownMenu from '@radix-ui/react-dropdown-menu'
 import { Data, SizeStyle } from '~types'
 import { useTLDrawContext } from '~hooks'
-import { DMContent, DMItem, DMTriggerIcon } from '~components/DropdownMenu'
+import { DMContent, DMTriggerIcon } from '~components/DropdownMenu'
 import { ToolButton } from '~components/ToolButton'
 import { SizeSmallIcon, SizeMediumIcon, SizeLargeIcon } from '~components/icons'
 
diff --git a/packages/tldraw/src/components/TopPanel/TopPanel.tsx b/packages/tldraw/src/components/TopPanel/TopPanel.tsx
index 0b5942e5e..f8d10da91 100644
--- a/packages/tldraw/src/components/TopPanel/TopPanel.tsx
+++ b/packages/tldraw/src/components/TopPanel/TopPanel.tsx
@@ -10,25 +10,26 @@ import { ColorMenu } from './ColorMenu'
 import { Panel } from '~components/Panel'
 
 interface TopPanelProps {
+  readOnly: boolean
   showPages: boolean
   showMenu: boolean
   showStyles: boolean
   showZoom: boolean
 }
 
-export function TopPanel({ showPages, showMenu, showStyles, showZoom }: TopPanelProps) {
+export function TopPanel({ readOnly, showPages, showMenu, showStyles, showZoom }: TopPanelProps) {
   return (
     <StyledTopPanel>
       {(showMenu || showPages) && (
         <Panel side="left">
-          {showMenu && <Menu />}
+          {showMenu && <Menu readOnly={readOnly} />}
           {showPages && <PageMenu />}
         </Panel>
       )}
       <StyledSpacer />
       {(showStyles || showZoom) && (
         <Panel side="right">
-          {showStyles && (
+          {showStyles && !readOnly && (
             <>
               <ColorMenu />
               <SizeMenu />
diff --git a/packages/tldraw/src/hooks/index.ts b/packages/tldraw/src/hooks/index.ts
index bf38556de..27761c4cc 100644
--- a/packages/tldraw/src/hooks/index.ts
+++ b/packages/tldraw/src/hooks/index.ts
@@ -2,3 +2,5 @@ export * from './useKeyboardShortcuts'
 export * from './useTLDrawContext'
 export * from './useTheme'
 export * from './useCustomFonts'
+export * from './useFileSystemHandlers'
+export * from './useFileSystem'
diff --git a/packages/tldraw/src/hooks/useFileSystem.ts b/packages/tldraw/src/hooks/useFileSystem.ts
new file mode 100644
index 000000000..79f88585e
--- /dev/null
+++ b/packages/tldraw/src/hooks/useFileSystem.ts
@@ -0,0 +1,49 @@
+import * as React from 'react'
+import type { TLDrawState } from '~state'
+
+export function useFileSystem() {
+  const promptSaveBeforeChange = React.useCallback(async (tlstate: TLDrawState) => {
+    if (tlstate.isDirty) {
+      if (tlstate.fileSystemHandle) {
+        if (window.confirm('Do you want to save changes to your current project?')) {
+          await tlstate.saveProject()
+        }
+      } else {
+        if (window.confirm('Do you want to save your current project?')) {
+          await tlstate.saveProject()
+        }
+      }
+    }
+  }, [])
+
+  const onNewProject = React.useCallback(
+    async (tlstate: TLDrawState) => {
+      await promptSaveBeforeChange(tlstate)
+      tlstate.newProject()
+    },
+    [promptSaveBeforeChange]
+  )
+
+  const onSaveProject = React.useCallback((tlstate: TLDrawState) => {
+    tlstate.saveProject()
+  }, [])
+
+  const onSaveProjectAs = React.useCallback((tlstate: TLDrawState) => {
+    tlstate.saveProjectAs()
+  }, [])
+
+  const onOpenProject = React.useCallback(
+    async (tlstate: TLDrawState) => {
+      await promptSaveBeforeChange(tlstate)
+      tlstate.openProject()
+    },
+    [promptSaveBeforeChange]
+  )
+
+  return {
+    onNewProject,
+    onSaveProject,
+    onSaveProjectAs,
+    onOpenProject,
+  }
+}
diff --git a/packages/tldraw/src/hooks/useFileSystemHandlers.ts b/packages/tldraw/src/hooks/useFileSystemHandlers.ts
new file mode 100644
index 000000000..1fad1cc2c
--- /dev/null
+++ b/packages/tldraw/src/hooks/useFileSystemHandlers.ts
@@ -0,0 +1,45 @@
+import * as React from 'react'
+import { useTLDrawContext } from '~hooks'
+
+export function useFileSystemHandlers() {
+  const { tlstate, callbacks } = useTLDrawContext()
+
+  const onNewProject = React.useCallback(
+    async (e?: KeyboardEvent) => {
+      if (e && callbacks.onOpenProject) e.preventDefault()
+      callbacks.onNewProject?.(tlstate)
+    },
+    [callbacks]
+  )
+
+  const onSaveProject = React.useCallback(
+    (e?: KeyboardEvent) => {
+      if (e && callbacks.onOpenProject) e.preventDefault()
+      callbacks.onSaveProject?.(tlstate)
+    },
+    [callbacks]
+  )
+
+  const onSaveProjectAs = React.useCallback(
+    (e?: KeyboardEvent) => {
+      if (e && callbacks.onOpenProject) e.preventDefault()
+      callbacks.onSaveProjectAs?.(tlstate)
+    },
+    [callbacks]
+  )
+
+  const onOpenProject = React.useCallback(
+    async (e?: KeyboardEvent) => {
+      if (e && callbacks.onOpenProject) e.preventDefault()
+      callbacks.onOpenProject?.(tlstate)
+    },
+    [callbacks]
+  )
+
+  return {
+    onNewProject,
+    onSaveProject,
+    onSaveProjectAs,
+    onOpenProject,
+  }
+}
diff --git a/packages/tldraw/src/hooks/useKeyboardShortcuts.tsx b/packages/tldraw/src/hooks/useKeyboardShortcuts.tsx
index 59d354070..6783b5f06 100644
--- a/packages/tldraw/src/hooks/useKeyboardShortcuts.tsx
+++ b/packages/tldraw/src/hooks/useKeyboardShortcuts.tsx
@@ -1,7 +1,7 @@
 import * as React from 'react'
 import { useHotkeys } from 'react-hotkeys-hook'
 import { TLDrawShapeType } from '~types'
-import { useTLDrawContext } from '~hooks'
+import { useFileSystemHandlers, useTLDrawContext } from '~hooks'
 
 export function useKeyboardShortcuts(ref: React.RefObject<HTMLDivElement>) {
   const { tlstate } = useTLDrawContext()
@@ -102,13 +102,46 @@ export function useKeyboardShortcuts(ref: React.RefObject<HTMLDivElement>) {
     [tlstate]
   )
 
-  // Save
+  // File System
+
+  const { onNewProject, onOpenProject, onSaveProject, onSaveProjectAs } = useFileSystemHandlers()
+
+  useHotkeys(
+    'ctrl+n,command+n',
+    (e) => {
+      if (canHandleEvent()) {
+        onNewProject(e)
+      }
+    },
+    undefined,
+    [tlstate]
+  )
+  useHotkeys(
+    'ctrl+s,command+s',
+    (e) => {
+      if (canHandleEvent()) {
+        onSaveProject(e)
+      }
+    },
+    undefined,
+    [tlstate]
+  )
 
   useHotkeys(
     'ctrl+shift+s,command+shift+s',
-    () => {
+    (e) => {
       if (canHandleEvent()) {
-        tlstate.saveProject()
+        onSaveProjectAs(e)
+      }
+    },
+    undefined,
+    [tlstate]
+  )
+  useHotkeys(
+    'ctrl+o,command+o',
+    (e) => {
+      if (canHandleEvent()) {
+        onOpenProject(e)
       }
     },
     undefined,
@@ -453,7 +486,9 @@ export function useKeyboardShortcuts(ref: React.RefObject<HTMLDivElement>) {
     'command+shift+backspace',
     (e) => {
       if (canHandleEvent()) {
-        tlstate.resetDocument()
+        if (process.env.NODE_ENV === 'development') {
+          tlstate.resetDocument()
+        }
         e.preventDefault()
       }
     },
diff --git a/packages/tldraw/src/hooks/useTLDrawContext.tsx b/packages/tldraw/src/hooks/useTLDrawContext.tsx
index b5c59a07b..a638ba9ba 100644
--- a/packages/tldraw/src/hooks/useTLDrawContext.tsx
+++ b/packages/tldraw/src/hooks/useTLDrawContext.tsx
@@ -1,11 +1,19 @@
 import * as React from 'react'
 import type { Data } from '~types'
-import type { UseStore } from 'zustand'
+import type { UseBoundStore } from 'zustand'
 import type { TLDrawState } from '~state'
 
 export interface TLDrawContextType {
   tlstate: TLDrawState
-  useSelector: UseStore<Data>
+  useSelector: UseBoundStore<Data>
+  callbacks: {
+    onNewProject?: (tlstate: TLDrawState) => void
+    onSaveProject?: (tlstate: TLDrawState) => void
+    onSaveProjectAs?: (tlstate: TLDrawState) => void
+    onOpenProject?: (tlstate: TLDrawState) => void
+    onSignIn?: (tlstate: TLDrawState) => void
+    onSignOut?: (tlstate: TLDrawState) => void
+  }
 }
 
 export const TLDrawContext = React.createContext<TLDrawContextType>({} as TLDrawContextType)
diff --git a/packages/tldraw/src/index.ts b/packages/tldraw/src/index.ts
index 2e45b1fdf..b8a7c6603 100644
--- a/packages/tldraw/src/index.ts
+++ b/packages/tldraw/src/index.ts
@@ -2,3 +2,4 @@ export * from './TLDraw'
 export * from './types'
 export * from './shape-utils'
 export { TLDrawState } from './state'
+export { useFileSystem } from './hooks'
diff --git a/packages/tldraw/src/state/data/browser-fs-access/index.d.ts b/packages/tldraw/src/state/data/browser-fs-access/index.d.ts
new file mode 100644
index 000000000..a8b1f8d8e
--- /dev/null
+++ b/packages/tldraw/src/state/data/browser-fs-access/index.d.ts
@@ -0,0 +1,99 @@
+/**
+ * Opens file(s) from disk.
+ */
+export function fileOpen<M extends boolean | undefined = false>(options?: {
+  /** Acceptable MIME types. [] */
+  mimeTypes?: string[]
+  /** Acceptable file extensions. Defaults to "". */
+  extensions?: string[]
+  /** Suggested file description. Defaults to "". */
+  description?: string
+  /** Allow multiple files to be selected. Defaults to false. */
+  multiple?: M
+  /**
+   * Configurable cleanup and `Promise` rejector usable with legacy API for
+   * determining when (and reacting if) a user cancels the operation. The
+   * method will be passed a reference to the internal `rejectionHandler` that
+   * can, e.g., be attached to/removed from the window or called after a
+   * timeout. The method should return a function that will be called when
+   * either the user chooses to open a file or the `rejectionHandler` is
+   * called. In the latter case, the returned function will also be passed a
+   * reference to the `reject` callback for the `Promise` returned by
+   * `fileOpen`, so that developers may reject the `Promise` when desired at
+   * that time.
+   * ToDo: Remove this workaround once
+   *   https://github.com/whatwg/html/issues/6376 is specified and supported.
+   */
+  setupLegacyCleanupAndRejection?: (
+    rejectionHandler?: () => void
+  ) => (reject: (reason?: any) => void) => void
+}): M extends false | undefined ? Promise<FileWithHandle> : Promise<FileWithHandle[]>
+
+/**
+ * Saves a file to disk.
+ * @returns Optional file handle to save in place.
+ */
+export function fileSave(
+  /** To-be-saved blob */
+  blob: Blob,
+  options?: {
+    /** Suggested file name. Defaults to "Untitled". */
+    fileName?: string
+    /** Suggested file extensions. Defaults to [""]. */
+    extensions?: string[]
+    /** Suggested file description. Defaults to "". */
+    description?: string
+  },
+  /**
+   * A potentially existing file handle for a file to save to. Defaults to
+   * null.
+   */
+  existingHandle?: FileSystemHandle | null,
+  /**
+   * Determines whether to throw (rather than open a new file save dialog)
+   * when existingHandle is no longer good. Defaults to false.
+   */
+  throwIfExistingHandleNotGood?: boolean | false
+): Promise<FileSystemHandle>
+
+/**
+ * Opens a directory from disk using the File System Access API.
+ * @returns Contained files.
+ */
+export function directoryOpen(options?: {
+  /** Whether to recursively get subdirectories. */
+  recursive: boolean
+}): Promise<FileWithDirectoryHandle[]>
+
+/**
+ * Whether the File System Access API is supported.
+ */
+export const supported: boolean
+
+export function imageToBlob(img: HTMLImageElement): Promise<Blob>
+
+export interface FileWithHandle extends File {
+  handle?: FileSystemHandle
+}
+
+export interface FileWithDirectoryHandle extends File {
+  directoryHandle?: FileSystemHandle
+}
+
+// The following typings implement the relevant parts of the File System Access
+// API. This can be removed once the specification reaches the Candidate phase
+// and is implemented as part of microsoft/TSJS-lib-generator.
+
+export interface FileSystemHandlePermissionDescriptor {
+  mode?: 'read' | 'readwrite'
+}
+
+export interface FileSystemHandle {
+  readonly kind: 'file' | 'directory'
+  readonly name: string
+
+  isSameEntry: (other: FileSystemHandle) => Promise<boolean>
+
+  queryPermission: (descriptor?: FileSystemHandlePermissionDescriptor) => Promise<PermissionState>
+  requestPermission: (descriptor?: FileSystemHandlePermissionDescriptor) => Promise<PermissionState>
+}
diff --git a/packages/tldraw/src/state/data/browser-fs-access/index.js b/packages/tldraw/src/state/data/browser-fs-access/index.js
new file mode 100644
index 000000000..84c16a5bf
--- /dev/null
+++ b/packages/tldraw/src/state/data/browser-fs-access/index.js
@@ -0,0 +1,334 @@
+/* eslint-disable */
+/* eslint-disable @typescript-eslint/ban-ts-comment */
+// @ts-nocheck
+
+var w = Object.defineProperty
+var q = (e) => w(e, '__esModule', { value: !0 })
+var u = (e, t) => () => e && (t = e((e = 0))),
+  t
+var p = (e, t) => {
+  q(e)
+  for (var i in t) w(e, i, { get: t[i], enumerable: !0 })
+}
+var r = (e, t, i) =>
+  new Promise((d, a) => {
+    var l = (s) => {
+        try {
+          n(i.next(s))
+        } catch (o) {
+          a(o)
+        }
+      },
+      c = (s) => {
+        try {
+          n(i.throw(s))
+        } catch (o) {
+          a(o)
+        }
+      },
+      n = (s) => (s.done ? d(s.value) : Promise.resolve(s.value).then(l, c))
+    n((i = i.apply(e, t)).next())
+  })
+var y = {}
+p(y, { default: () => z })
+var z,
+  v = u(() => {
+    z = (...t) =>
+      r(void 0, [...t], function* (e = {}) {
+        return new Promise((i, d) => {
+          let a = document.createElement('input')
+          a.type = 'file'
+          let l = [...(e.mimeTypes ? e.mimeTypes : []), e.extensions ? e.extensions : []].join()
+          ;(a.multiple = e.multiple || !1), (a.accept = l || '')
+          let c,
+            n = () => c(d)
+          e.setupLegacyCleanupAndRejection
+            ? (c = e.setupLegacyCleanupAndRejection(n))
+            : ((c = (s) => {
+                window.removeEventListener('pointermove', n),
+                  window.removeEventListener('pointerdown', n),
+                  window.removeEventListener('keydown', n),
+                  s && s(new DOMException('The user aborted a request.', 'AbortError'))
+              }),
+              window.addEventListener('pointermove', n),
+              window.addEventListener('pointerdown', n),
+              window.addEventListener('keydown', n)),
+            a.addEventListener('change', () => {
+              c(), i(a.multiple ? Array.from(a.files) : a.files[0])
+            }),
+            a.click()
+        })
+      })
+  })
+var E = {}
+p(E, { default: () => B })
+var h,
+  B,
+  j = u(() => {
+    ;(h = (e) =>
+      r(void 0, null, function* () {
+        let t = yield e.getFile()
+        return (t.handle = e), t
+      })),
+      (B = (...t) =>
+        r(void 0, [...t], function* (e = {}) {
+          let i = yield window.chooseFileSystemEntries({
+            accepts: [
+              {
+                description: e.description || '',
+                mimeTypes: e.mimeTypes || ['*/*'],
+                extensions: e.extensions || [''],
+              },
+            ],
+            multiple: e.multiple || !1,
+          })
+          return e.multiple ? Promise.all(i.map(h)) : h(i)
+        }))
+  })
+var g = {}
+p(g, { default: () => I })
+var G,
+  I,
+  x = u(() => {
+    ;(G = (e) =>
+      r(void 0, null, function* () {
+        let t = yield e.getFile()
+        return (t.handle = e), t
+      })),
+      (I = (...t) =>
+        r(void 0, [...t], function* (e = {}) {
+          let i = {}
+          e.mimeTypes
+            ? e.mimeTypes.map((l) => {
+                i[l] = e.extensions || []
+              })
+            : (i['*/*'] = e.extensions || [])
+          let d = yield window.showOpenFilePicker({
+              types: [{ description: e.description || '', accept: i }],
+              multiple: e.multiple || !1,
+            }),
+            a = yield Promise.all(d.map(G))
+          return e.multiple ? a : a[0]
+        }))
+  })
+var F = {}
+p(F, { default: () => K })
+var K,
+  k = u(() => {
+    K = (...t) =>
+      r(void 0, [...t], function* (e = {}) {
+        return (
+          (e.recursive = e.recursive || !1),
+          new Promise((i, d) => {
+            let a = document.createElement('input')
+            ;(a.type = 'file'), (a.webkitdirectory = !0)
+            let l,
+              c = () => l(d)
+            e.setupLegacyCleanupAndRejection
+              ? (l = e.setupLegacyCleanupAndRejection(c))
+              : ((l = (n) => {
+                  window.removeEventListener('pointermove', c),
+                    window.removeEventListener('pointerdown', c),
+                    window.removeEventListener('keydown', c),
+                    n && n(new DOMException('The user aborted a request.', 'AbortError'))
+                }),
+                window.addEventListener('pointermove', c),
+                window.addEventListener('pointerdown', c),
+                window.addEventListener('keydown', c)),
+              a.addEventListener('change', () => {
+                l()
+                let n = Array.from(a.files)
+                e.recursive || (n = n.filter((s) => s.webkitRelativePath.split('/').length === 2)),
+                  i(n)
+              }),
+              a.click()
+          })
+        )
+      })
+  })
+var b = {}
+p(b, { default: () => Q })
+var P,
+  Q,
+  O = u(() => {
+    ;(P = (d, a, ...l) =>
+      r(void 0, [d, a, ...l], function* (e, t, i = e.name) {
+        let c = [],
+          n = []
+        for (let s of e.getEntries()) {
+          let o = `${i}/${s.name}`
+          s.isFile
+            ? n.push(
+                yield s.getFile().then(
+                  (f) => (
+                    (f.directoryHandle = e),
+                    Object.defineProperty(f, 'webkitRelativePath', {
+                      configurable: !0,
+                      enumerable: !0,
+                      get: () => o,
+                    })
+                  )
+                )
+              )
+            : s.isDirectory && t && c.push(yield P(s, t, o))
+        }
+        return [...(yield Promise.all(c)).flat(), ...(yield Promise.all(n))]
+      })),
+      (Q = (...t) =>
+        r(void 0, [...t], function* (e = {}) {
+          e.recursive = e.recursive || !1
+          let i = yield window.chooseFileSystemEntries({ type: 'open-directory' })
+          return P(i, e.recursive)
+        }))
+  })
+var T = {}
+p(T, { default: () => V })
+var R,
+  V,
+  S = u(() => {
+    ;(R = (d, a, ...l) =>
+      r(void 0, [d, a, ...l], function* (e, t, i = e.name) {
+        let c = [],
+          n = []
+        for (let s of e.values()) {
+          let o = `${i}/${s.name}`
+          s.kind === 'file'
+            ? n.push(
+                yield s.getFile().then(
+                  (f) => (
+                    (f.directoryHandle = e),
+                    Object.defineProperty(f, 'webkitRelativePath', {
+                      configurable: !0,
+                      enumerable: !0,
+                      get: () => o,
+                    })
+                  )
+                )
+              )
+            : s.kind === 'directory' && t && c.push(yield R(s, t, o))
+        }
+        return [...(yield Promise.all(c)).flat(), ...(yield Promise.all(n))]
+      })),
+      (V = (...t) =>
+        r(void 0, [...t], function* (e = {}) {
+          e.recursive = e.recursive || !1
+          let i = yield window.showDirectoryPicker()
+          return R(i, e.recursive)
+        }))
+  })
+var N = {}
+p(N, { default: () => Y })
+var Y,
+  U = u(() => {
+    Y = (i, ...d) =>
+      r(void 0, [i, ...d], function* (e, t = {}) {
+        let a = document.createElement('a')
+        ;(a.download = t.fileName || 'Untitled'),
+          (a.href = URL.createObjectURL(e)),
+          a.addEventListener('click', () => {
+            setTimeout(() => URL.revokeObjectURL(a.href), 30 * 1e3)
+          }),
+          a.click()
+      })
+  })
+var C = {}
+p(C, { default: () => Z })
+var Z,
+  D = u(() => {
+    Z = (d, ...a) =>
+      r(void 0, [d, ...a], function* (e, t = {}, i = null) {
+        ;(t.fileName = t.fileName || 'Untitled'),
+          (i =
+            i ||
+            (yield window.chooseFileSystemEntries({
+              type: 'save-file',
+              accepts: [
+                {
+                  description: t.description || '',
+                  mimeTypes: [e.type],
+                  extensions: t.extensions || [''],
+                },
+              ],
+            })))
+        let l = yield i.createWritable()
+        return yield l.write(e), yield l.close(), i
+      })
+  })
+var M = {}
+p(M, { default: () => _ })
+var _,
+  W = u(() => {
+    _ = (a, ...l) =>
+      r(void 0, [a, ...l], function* (e, t = {}, i = null, d = !1) {
+        t.fileName = t.fileName || 'Untitled'
+        let c = {}
+        if (
+          (t.mimeTypes
+            ? (t.mimeTypes.push(e.type),
+              t.mimeTypes.map((o) => {
+                c[o] = t.extensions || []
+              }))
+            : (c[e.type] = t.extensions || []),
+          i)
+        )
+          try {
+            yield i.getFile()
+          } catch (o) {
+            if (((i = null), d)) throw o
+          }
+        let n =
+            i ||
+            (yield window.showSaveFilePicker({
+              suggestedName: t.fileName,
+              types: [{ description: t.description || '', accept: c }],
+            })),
+          s = yield n.createWritable()
+        return yield s.write(e), yield s.close(), n
+      })
+  })
+p(exports, { directoryOpen: () => A, fileOpen: () => L, fileSave: () => $, supported: () => m })
+var H = (() => {
+    if ('top' in self && self !== top)
+      try {
+        top.location + ''
+      } catch (e) {
+        return !1
+      }
+    else {
+      if ('chooseFileSystemEntries' in self) return 'chooseFileSystemEntries'
+      if ('showOpenFilePicker' in self) return 'showOpenFilePicker'
+    }
+    return !1
+  })(),
+  m = H
+var J = m
+  ? m === 'chooseFileSystemEntries'
+    ? Promise.resolve().then(() => (j(), E))
+    : Promise.resolve().then(() => (x(), g))
+  : Promise.resolve().then(() => (v(), y))
+function L(...e) {
+  return r(this, null, function* () {
+    return (yield J).default(...e)
+  })
+}
+var X = m
+  ? m === 'chooseFileSystemEntries'
+    ? Promise.resolve().then(() => (O(), b))
+    : Promise.resolve().then(() => (S(), T))
+  : Promise.resolve().then(() => (k(), F))
+function A(...e) {
+  return r(this, null, function* () {
+    return (yield X).default(...e)
+  })
+}
+var ee = m
+  ? m === 'chooseFileSystemEntries'
+    ? Promise.resolve().then(() => (D(), C))
+    : Promise.resolve().then(() => (W(), M))
+  : Promise.resolve().then(() => (U(), N))
+function $(...e) {
+  return r(this, null, function* () {
+    return (yield ee).default(...e)
+  })
+}
+// @license © 2020 Google LLC. Licensed under the Apache License, Version 2.0.
diff --git a/packages/tldraw/src/state/data/filesystem.spec.ts b/packages/tldraw/src/state/data/filesystem.spec.ts
new file mode 100644
index 000000000..8da670fa8
--- /dev/null
+++ b/packages/tldraw/src/state/data/filesystem.spec.ts
@@ -0,0 +1,10 @@
+describe('when saving data to the file system', () => {
+  it.todo('saves a new file in the filesystem')
+  it.todo('saves a new file in the filesystem')
+})
+
+describe('when opening files from file system', () => {
+  it.todo('opens a file and loads it into the document')
+  it.todo('opens an older file, migrates it, and loads it into the document')
+  it.todo('opens a corrupt file, tries to fix it, and fails without crashing')
+})
diff --git a/packages/tldraw/src/state/data/filesystem.ts b/packages/tldraw/src/state/data/filesystem.ts
new file mode 100644
index 000000000..f028567ba
--- /dev/null
+++ b/packages/tldraw/src/state/data/filesystem.ts
@@ -0,0 +1,101 @@
+import type { TLDrawDocument, TLDrawFile } from '~types'
+import { fileSave, fileOpen, FileSystemHandle } from './browser-fs-access'
+import { get as getFromIdb, set as setToIdb } from 'idb-keyval'
+
+const options = { mode: 'readwrite' as const }
+
+const checkPermissions = async (handle: FileSystemHandle) => {
+  return (
+    (await handle.queryPermission(options)) === 'granted' ||
+    (await handle.requestPermission(options)) === 'granted'
+  )
+}
+
+export async function loadFileHandle() {
+  const fileHandle = await getFromIdb(`tldraw_file_handle_${window.location.origin}`)
+  if (!fileHandle) return null
+  return fileHandle
+}
+
+export async function saveFileHandle(fileHandle: FileSystemHandle | null) {
+  return setToIdb(`tldraw_file_handle_${window.location.origin}`, fileHandle)
+}
+
+export async function saveToFileSystem(
+  document: TLDrawDocument,
+  fileHandle: FileSystemHandle | null
+) {
+  // Create the saved file data
+  const file: TLDrawFile = {
+    name: document.name || 'New Document',
+    fileHandle: fileHandle ?? null,
+    document,
+    assets: {},
+  }
+
+  // Serialize to JSON
+  const json = JSON.stringify(file, null, 2)
+
+  // Create blob
+  const blob = new Blob([json], {
+    type: 'application/vnd.tldraw+json',
+  })
+
+  if (fileHandle) {
+    const hasPermissions = await checkPermissions(fileHandle)
+    if (!hasPermissions) return null
+  }
+
+  // Save to file system
+  const newFileHandle = await fileSave(
+    blob,
+    {
+      fileName: `${file.name}.tldr`,
+      description: 'TLDraw File',
+      extensions: [`.tldr`],
+    },
+    fileHandle
+  )
+
+  await saveFileHandle(newFileHandle)
+
+  // Return true
+  return newFileHandle
+}
+
+export async function openFromFileSystem(): Promise<null | {
+  fileHandle: FileSystemHandle | null
+  document: TLDrawDocument
+}> {
+  // Get the blob
+  const blob = await fileOpen({
+    description: 'TLDraw File',
+    extensions: [`.tldr`],
+    multiple: false,
+  })
+
+  if (!blob) return null
+
+  // Get JSON from blob
+  const json: string = await new Promise((resolve) => {
+    const reader = new FileReader()
+    reader.onloadend = () => {
+      if (reader.readyState === FileReader.DONE) {
+        resolve(reader.result as string)
+      }
+    }
+    reader.readAsText(blob, 'utf8')
+  })
+
+  // Parse
+  const file: TLDrawFile = JSON.parse(json)
+
+  const fileHandle = blob.handle ?? null
+
+  await saveFileHandle(fileHandle)
+
+  return {
+    fileHandle,
+    document: file.document,
+  }
+}
diff --git a/packages/tldraw/src/state/data/migrate.spec.ts b/packages/tldraw/src/state/data/migrate.spec.ts
new file mode 100644
index 000000000..66cd22751
--- /dev/null
+++ b/packages/tldraw/src/state/data/migrate.spec.ts
@@ -0,0 +1,15 @@
+import type { TLDrawDocument } from '~types'
+import { TLDrawState } from '~state'
+import oldDoc from '../../test/old-doc'
+import oldDoc2 from '../../test/old-doc-2'
+
+describe('When migrating bindings', () => {
+  it('migrates a document without a version', () => {
+    new TLDrawState().loadDocument(oldDoc as unknown as TLDrawDocument)
+  })
+
+  it('migrates a document with an older version', () => {
+    const tlstate = new TLDrawState().loadDocument(oldDoc2 as unknown as TLDrawDocument)
+    expect(tlstate.getShape('d7ab0a49-3cb3-43ae-3d83-f5cf2f4a510a').style.color).toBe('black')
+  })
+})
diff --git a/packages/tldraw/src/state/migrate.ts b/packages/tldraw/src/state/data/migrate.ts
similarity index 90%
rename from packages/tldraw/src/state/migrate.ts
rename to packages/tldraw/src/state/data/migrate.ts
index acbe9fd27..8bfdd47bd 100644
--- a/packages/tldraw/src/state/migrate.ts
+++ b/packages/tldraw/src/state/data/migrate.ts
@@ -4,10 +4,9 @@ import { Decoration, TLDrawDocument, TLDrawShapeType } from '~types'
 export function migrate(document: TLDrawDocument, newVersion: number): TLDrawDocument {
   const { version = 0 } = document
 
-  console.log(`Migrating document from ${version} to ${newVersion}.`)
-
   if (version === newVersion) return document
 
+  // Lowercase styles, move binding meta to binding
   if (version <= 13) {
     Object.values(document.pages).forEach((page) => {
       Object.values(page.bindings).forEach((binding) => {
@@ -39,6 +38,12 @@ export function migrate(document: TLDrawDocument, newVersion: number): TLDrawDoc
     })
   }
 
+  // Add document name and file system handle
+  if (version <= 13.1) {
+    document.name = 'New Document'
+  }
+
+  // Cleanup
   Object.values(document.pageStates).forEach((pageState) => {
     pageState.selectedIds = pageState.selectedIds.filter((id) => {
       return document.pages[pageState.id].shapes[id] !== undefined
diff --git a/packages/tldraw/src/state/tlstate.ts b/packages/tldraw/src/state/tlstate.ts
index 73e0f6b89..6bf628ee0 100644
--- a/packages/tldraw/src/state/tlstate.ts
+++ b/packages/tldraw/src/state/tlstate.ts
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
 /* eslint-disable @typescript-eslint/ban-ts-comment */
 /* eslint-disable @typescript-eslint/no-non-null-assertion */
 import { StateManager } from 'rko'
@@ -47,7 +48,9 @@ import { sample } from './utils'
 import { createTools, ToolType } from './tool'
 import type { BaseTool } from './tool/BaseTool'
 import { USER_COLORS, FIT_TO_SCREEN_PADDING } from '~constants'
-import { migrate } from './migrate'
+import { migrate } from './data/migrate'
+import { loadFileHandle, openFromFileSystem, saveToFileSystem } from './data/filesystem'
+import type { FileSystemHandle } from './data/browser-fs-access'
 
 const uuid = Utils.uniqueId()
 
@@ -56,6 +59,8 @@ export class TLDrawState extends StateManager<Data> {
   private _onChange?: (tlstate: TLDrawState, data: Data, reason: string) => void
   private _onUserChange?: (tlstate: TLDrawState, user: TLDrawUser) => void
 
+  readOnly = false
+
   inputs?: Inputs
 
   selectHistory: SelectHistory = {
@@ -94,6 +99,10 @@ export class TLDrawState extends StateManager<Data> {
     offset: [0, 0],
   }
 
+  fileSystemHandle: FileSystemHandle | null = null
+
+  isDirty = false
+
   constructor(
     id?: string,
     onMount?: (tlstate: TLDrawState) => void,
@@ -113,6 +122,10 @@ export class TLDrawState extends StateManager<Data> {
     this.loadDocument(this.document)
     this.patchState({ document: migrate(this.document, TLDrawState.version) })
 
+    loadFileHandle().then((fileHandle) => {
+      this.fileSystemHandle = fileHandle
+    })
+
     this._onChange = onChange
     this._onMount = onMount
     this._onUserChange = onUserChange
@@ -334,6 +347,13 @@ export class TLDrawState extends StateManager<Data> {
       }
     }
 
+    // Temporary block on editing pages while in readonly mode.
+    // This is a broad solution but not a very good one: the UX
+    // for interacting with a readOnly document will be more nuanced.
+    if (this.readOnly) {
+      data.document.pages = prev.document.pages
+    }
+
     return data
   }
 
@@ -344,6 +364,12 @@ export class TLDrawState extends StateManager<Data> {
    */
   protected onStateDidChange = (state: Data, id: string): void => {
     if (!id.startsWith('patch')) {
+      if (!id.startsWith('replace')) {
+        // If we've changed the undo stack, then the file is out of
+        // sync with any saved version on the file system.
+        this.isDirty = true
+      }
+
       this.clearSelectHistory()
     }
 
@@ -583,22 +609,7 @@ export class TLDrawState extends StateManager<Data> {
 
     this.resetHistory()
       .clearSelectHistory()
-      .loadDocument(TLDrawState.defaultDocument)
-      .patchState(
-        {
-          document: {
-            pageStates: {
-              [this.currentPageId]: {
-                bindingId: null,
-                editingId: null,
-                hoveredId: null,
-                pointedId: null,
-              },
-            },
-          },
-        },
-        'reset_document'
-      )
+      .loadDocument(migrate(TLDrawState.defaultDocument, TLDrawState.version))
       .persist()
     return this
   }
@@ -813,32 +824,73 @@ export class TLDrawState extends StateManager<Data> {
     )
   }
 
+  // Should we move this to the app layer? onSave, onSaveAs, etc?
+
   /**
    * Create a new project.
-   * Should move to the www layer.
-   * @todo
    */
   newProject = () => {
-    // TODO
+    if (!this.isLocal) return
+    this.fileSystemHandle = null
     this.resetDocument()
   }
 
   /**
    * Save the current project.
-   * Should move to the www layer.
-   * @todo
    */
-  saveProject = () => {
-    this.persist()
+  saveProject = async () => {
+    if (this.readOnly) return
+    try {
+      const fileHandle = await saveToFileSystem(this.document, this.fileSystemHandle)
+      this.fileSystemHandle = fileHandle
+      this.persist()
+      this.isDirty = false
+    } catch (e: any) {
+      // Likely cancelled
+      console.error(e.message)
+    }
+    return this
+  }
+
+  /**
+   * Save the current project as a new file.
+   */
+  saveProjectAs = async () => {
+    try {
+      const fileHandle = await saveToFileSystem(this.document, null)
+      this.fileSystemHandle = fileHandle
+      this.persist()
+      this.isDirty = false
+    } catch (e: any) {
+      // Likely cancelled
+      console.error(e.message)
+    }
+    return this
   }
 
   /**
    * Load a project from the filesystem.
-   * Should move to the www layer.
    * @todo
    */
-  loadProject = () => {
-    // TODO
+  openProject = async () => {
+    if (!this.isLocal) return
+
+    try {
+      const result = await openFromFileSystem()
+      if (!result) {
+        throw Error()
+      }
+
+      const { fileHandle, document } = result
+      this.loadDocument(document)
+      this.fileSystemHandle = fileHandle
+      this.zoomToFit()
+      this.persist()
+    } catch (e) {
+      console.error(e)
+    } finally {
+      this.persist()
+    }
   }
 
   /**
@@ -847,7 +899,7 @@ export class TLDrawState extends StateManager<Data> {
    * @todo
    */
   signOut = () => {
-    // TODO
+    // todo
   }
   /* -------------------- Getters --------------------- */
 
@@ -1037,6 +1089,7 @@ export class TLDrawState extends StateManager<Data> {
    * @param pageId The id of the page to duplicate.
    */
   duplicatePage = (pageId: string): this => {
+    if (this.readOnly) return this
     return this.setState(
       Commands.duplicatePage(this.state, [-this.bounds.width / 2, -this.bounds.height / 2], pageId)
     )
@@ -1047,6 +1100,7 @@ export class TLDrawState extends StateManager<Data> {
    * @param pageId The id of the page to delete.
    */
   deletePage = (pageId?: string): this => {
+    if (this.readOnly) return this
     if (Object.values(this.document.pages).length <= 1) return this
     return this.setState(Commands.deletePage(this.state, pageId ? pageId : this.currentPageId))
   }
@@ -1110,6 +1164,7 @@ export class TLDrawState extends StateManager<Data> {
    * @param point
    */
   paste = (point?: number[]) => {
+    if (this.readOnly) return
     const pasteInCurrentPage = (shapes: TLDrawShape[], bindings: TLDrawBinding[]) => {
       const idsMap: Record<string, string> = {}
 
@@ -1669,6 +1724,7 @@ export class TLDrawState extends StateManager<Data> {
    * @param args arguments of the session's start method.
    */
   startSession = <T extends SessionType>(type: T, ...args: ExceptFirstTwo<ArgsOfType<T>>): this => {
+    if (this.readOnly && type !== SessionType.Brush) return this
     if (this.session) {
       throw Error(`Already in a session! (${this.session.constructor.name})`)
     }
@@ -1738,9 +1794,7 @@ export class TLDrawState extends StateManager<Data> {
     const { session } = this
 
     if (!session) return this
-
     this.session = undefined
-
     const result = session.complete(this.state)
 
     if (result === undefined) {
@@ -1901,7 +1955,7 @@ export class TLDrawState extends StateManager<Data> {
     )
   }
 
-  createTextShapeAtPoint(point: number[]) {
+  createTextShapeAtPoint(point: number[]): this {
     const {
       shapes,
       appState: { currentPageId, currentStyle },
@@ -1915,9 +1969,7 @@ export class TLDrawState extends StateManager<Data> {
             .sort((a, b) => b.childIndex - a.childIndex)[0].childIndex + 1
 
     const id = Utils.uniqueId()
-
     const Text = shapeUtils[TLDrawShapeType.Text]
-
     const newShape = Text.create({
       id,
       parentId: currentPageId,
@@ -1925,14 +1977,12 @@ export class TLDrawState extends StateManager<Data> {
       point,
       style: { ...currentStyle },
     })
-
     const bounds = Text.getBounds(newShape)
-
     newShape.point = Vec.sub(newShape.point, [bounds.width / 2, bounds.height / 2])
-
     this.createShapes(newShape)
-
     this.setEditingId(id)
+
+    return this
   }
 
   /**
@@ -2099,6 +2149,7 @@ export class TLDrawState extends StateManager<Data> {
    * @param ids The ids to duplicate (defaults to selection).
    */
   duplicate = (ids = this.selectedIds, point?: number[]): this => {
+    if (this.readOnly) return this
     if (ids.length === 0) return this
     return this.setState(Commands.duplicate(this.state, ids, point))
   }
@@ -2173,6 +2224,8 @@ export class TLDrawState extends StateManager<Data> {
     groupId = Utils.uniqueId(),
     pageId = this.currentPageId
   ): this => {
+    if (this.readOnly) return this
+
     if (ids.length === 1 && this.getShape(ids[0], pageId).type === TLDrawShapeType.Group) {
       return this.ungroup(ids, pageId)
     }
@@ -2189,6 +2242,8 @@ export class TLDrawState extends StateManager<Data> {
    * @todo
    */
   ungroup = (ids = this.selectedIds, pageId = this.currentPageId): this => {
+    if (this.readOnly) return this
+
     const groups = ids
       .map((id) => this.getShape(id, pageId))
       .filter((shape) => shape.type === TLDrawShapeType.Group)
@@ -2431,6 +2486,10 @@ export class TLDrawState extends StateManager<Data> {
     return this.selectedIds.includes(id)
   }
 
+  get isLocal() {
+    return this.state.room === undefined || this.state.room.id === 'local'
+  }
+
   get status() {
     return this.appState.status
   }
@@ -2465,6 +2524,7 @@ export class TLDrawState extends StateManager<Data> {
 
   static defaultDocument: TLDrawDocument = {
     id: 'doc',
+    name: 'New Document',
     version: 13,
     pages: {
       page: {
diff --git a/packages/tldraw/src/test/migration.spec.ts b/packages/tldraw/src/test/migration.spec.ts
deleted file mode 100644
index 59ae8a76f..000000000
--- a/packages/tldraw/src/test/migration.spec.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-/* eslint-disable @typescript-eslint/ban-ts-comment */
-import { TLDrawState } from '~state'
-import type { TLDrawDocument } from '~types'
-import oldDoc from './old-doc'
-import oldDoc2 from './old-doc-2'
-
-describe('When migrating bindings', () => {
-  it('migrates', () => {
-    // Object.values((oldDoc as unknown as TLDrawDocument).pages).forEach((page) => {
-    //   Object.values(page.bindings).forEach((binding) => {
-    //     if ('meta' in binding) {
-    //       // @ts-ignore
-    //       Object.assign(binding, binding.meta)
-    //     }
-    //   })
-    // })
-
-    new TLDrawState().loadDocument(oldDoc as unknown as TLDrawDocument)
-  })
-
-  it('migrates older document', () => {
-    // Object.values((oldDoc as unknown as TLDrawDocument).pages).forEach((page) => {
-    //   Object.values(page.bindings).forEach((binding) => {
-    //     if ('meta' in binding) {
-    //       // @ts-ignore
-    //       Object.assign(binding, binding.meta)
-    //     }
-    //   })
-    // })
-
-    const tlstate = new TLDrawState().loadDocument(oldDoc2 as unknown as TLDrawDocument)
-
-    expect(tlstate.getShape('d7ab0a49-3cb3-43ae-3d83-f5cf2f4a510a').style.color).toBe('black')
-  })
-})
diff --git a/packages/tldraw/src/test/mock-document.tsx b/packages/tldraw/src/test/mock-document.tsx
index 97972247d..cce76c3f0 100644
--- a/packages/tldraw/src/test/mock-document.tsx
+++ b/packages/tldraw/src/test/mock-document.tsx
@@ -3,6 +3,7 @@ import { TLDrawDocument, ColorStyle, DashStyle, SizeStyle, TLDrawShapeType } fro
 export const mockDocument: TLDrawDocument = {
   version: 0,
   id: 'doc',
+  name: 'New Document',
   pages: {
     page1: {
       id: 'page1',
diff --git a/packages/tldraw/src/test/renderWithContext.tsx b/packages/tldraw/src/test/renderWithContext.tsx
index ca10b40e0..64a86612d 100644
--- a/packages/tldraw/src/test/renderWithContext.tsx
+++ b/packages/tldraw/src/test/renderWithContext.tsx
@@ -8,7 +8,7 @@ import { render } from '@testing-library/react'
 export const Wrapper: React.FC = ({ children }) => {
   const [tlstate] = React.useState(() => new TLDrawState())
   const [context] = React.useState(() => {
-    return { tlstate, useSelector: tlstate.useStore }
+    return { tlstate, useSelector: tlstate.useStore, callbacks: {} }
   })
 
   const rWrapper = React.useRef<HTMLDivElement>(null)
diff --git a/packages/tldraw/src/types.ts b/packages/tldraw/src/types.ts
index 35533a6a2..2fdc5421a 100644
--- a/packages/tldraw/src/types.ts
+++ b/packages/tldraw/src/types.ts
@@ -13,6 +13,7 @@ import type {
 import type { TLPage, TLUser, TLPageState } from '@tldraw/core'
 import type { StoreApi } from 'zustand'
 import type { Command, Patch } from 'rko'
+import type { FileSystemHandle } from '~state/data/browser-fs-access'
 
 export interface TLDrawHandle extends TLHandle {
   canBind?: boolean
@@ -36,6 +37,7 @@ export type TLDrawPage = TLPage<TLDrawShape, TLDrawBinding>
 
 export interface TLDrawDocument {
   id: string
+  name: string
   pages: Record<string, TLDrawPage>
   pageStates: Record<string, TLPageState>
   version: number
@@ -396,3 +398,12 @@ export type Easing =
   | 'easeInExpo'
   | 'easeOutExpo'
   | 'easeInOutExpo'
+
+/* ------------------- File System ------------------ */
+
+export interface TLDrawFile {
+  name: string
+  fileHandle: FileSystemHandle | null
+  document: TLDrawDocument
+  assets: Record<string, unknown>
+}
diff --git a/www/components/editor.tsx b/www/components/editor.tsx
index c1e50f46f..2b039c977 100644
--- a/www/components/editor.tsx
+++ b/www/components/editor.tsx
@@ -1,4 +1,4 @@
-import { TLDraw, TLDrawState, Data } from '@tldraw/tldraw'
+import { TLDraw, TLDrawState, Data, useFileSystem } from '@tldraw/tldraw'
 import * as gtag from '-utils/gtag'
 import React from 'react'
 
@@ -29,9 +29,17 @@ export default function Editor({ id = 'home' }: EditorProps) {
     [id]
   )
 
+  const fileSystemEvents = useFileSystem()
+
   return (
     <div className="tldraw">
-      <TLDraw id={id} onMount={handleMount} onChange={handleChange} autofocus />
+      <TLDraw
+        id={id}
+        onMount={handleMount}
+        onChange={handleChange}
+        autofocus
+        {...fileSystemEvents}
+      />
     </div>
   )
 }
diff --git a/www/hooks/useFileSystem.ts b/www/hooks/useFileSystem.ts
new file mode 100644
index 000000000..bd83d5a0b
--- /dev/null
+++ b/www/hooks/useFileSystem.ts
@@ -0,0 +1,43 @@
+import * as React from 'react'
+import { TLDrawState } from '@tldraw/tldraw'
+
+export function useFileSystem(tlstate: TLDrawState) {
+  const promptSaveBeforeChange = React.useCallback(async () => {
+    if (tlstate.isDirty) {
+      if (tlstate.fileSystemHandle) {
+        if (window.confirm('Do you want to save changes to your current project?')) {
+          await tlstate.saveProject()
+        }
+      } else {
+        if (window.confirm('Do you want to save your current project?')) {
+          await tlstate.saveProject()
+        }
+      }
+    }
+  }, [tlstate])
+
+  const onNewProject = React.useCallback(async () => {
+    await promptSaveBeforeChange()
+    tlstate.newProject()
+  }, [tlstate, promptSaveBeforeChange])
+
+  const onSaveProject = React.useCallback(() => {
+    tlstate.saveProject()
+  }, [tlstate])
+
+  const onSaveProjectAs = React.useCallback(() => {
+    tlstate.saveProjectAs()
+  }, [tlstate])
+
+  const onOpenProject = React.useCallback(async () => {
+    await promptSaveBeforeChange()
+    tlstate.openProject()
+  }, [tlstate, promptSaveBeforeChange])
+
+  return {
+    onNewProject,
+    onSaveProject,
+    onSaveProjectAs,
+    onOpenProject,
+  }
+}
diff --git a/yarn.lock b/yarn.lock
index 64e99a8fb..fa5c2575e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9920,7 +9920,7 @@ raw-body@2.4.1:
     iconv-lite "0.4.24"
     unpipe "1.0.0"
 
-react-dom@17.0.2:
+react-dom@17.0.2, "react-dom@^16.8 || ^17.0":
   version "17.0.2"
   resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-17.0.2.tgz#ecffb6845e3ad8dbfcdc498f0d0a939736502c23"
   integrity sha512-s4h96KtLDUQlsENhMn1ar8t2bEa+q/YAtj8pPPdIjPDGBDIVNsrD9aXNWqspUe6AzKCIG0C1HZZLqLV7qpOBGA==
@@ -10008,7 +10008,7 @@ react-style-singleton@^2.1.0:
     invariant "^2.2.4"
     tslib "^1.0.0"
 
-react@17.0.2:
+react@17.0.2, react@>=16.8:
   version "17.0.2"
   resolved "https://registry.yarnpkg.com/react/-/react-17.0.2.tgz#d0b5cc516d29eb3eee383f75b62864cfb6800037"
   integrity sha512-gnhPt75i/dq/z3/6q/0asP78D0u592D5L1pd7M8P+dck6Fu/jJeL6iVVK23fptSUZj8Vjf++7wXA8UNclGQcbA==