add descriptions to examples (#2375)

Adds descriptions to examples.

![Kapture 2023-12-22 at 17 08
32](https://github.com/tldraw/tldraw/assets/1489520/d78657cf-b3c3-4160-b58b-7c08ed27823d)

They show as a list on the index page, and on individual examples they
show in a three-js style sidebar. For now, this is disabled completely
on mobile. Examples can still be opened in 'standalone' mode to get rid
of the sidebar.

Note: the 'view code' link won't work until after these changes are
merged.

There's a small impact on authoring examples: each one needs to live in
a folder with a README.md. At a minimum, the readme needs to look like
this:
```md
---
title: My Example
component: ./MyExample.tsx
---

Here is a 1-liner about my example
```

Optionally, you can:
- Add `hide: true` to the frontmatter to remove the example from the
list (you can skip the description this way)
- Add `order: 3` to control the order in which the example appears.
They're alphabetical otherwise
- Add some more description or links to docs below a `---`. This won't
show in the listing, but will be visible on GitHub and on the example
page itself.

As a follow-up, I'd like to add an 'Open in CodeSandbox' link to each
example. These won't work until we've made a release with these examples
(as our special examples codesandbox is tied to our release process) but
the code is there & ready to go!

Have a play, let me know what you think!

### Change Type

- [x] `documentation` — Changes to the documentation only[^2]

---------

Co-authored-by: Steve Ruiz <steveruizok@gmail.com>

README.md

@@ -1,7 +1,7 @@
 <div alt style="text-align: center; transform: scale(.5);">
 	<picture>
-		<source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/tldraw/tldraw/main/assets/github-hero-dark-2.png" />
-		<img alt="tldraw" src="https://raw.githubusercontent.com/tldraw/tldraw/main/assets/github-hero-light-2.png" />
+		<source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/tldraw/tldraw/main/assets/github-hero-dark-2.png"/>
+		<img alt="tldraw" src="https://raw.githubusercontent.com/tldraw/tldraw/main/assets/github-hero-light-2.png"/>
 	</picture>
 </div>
 

apps/examples/package.json

@@ -39,6 +39,7 @@
 		"@tldraw/assets": "workspace:*",
 		"@tldraw/tldraw": "workspace:*",
 		"@vercel/analytics": "^1.0.1",
+		"classnames": "^2.3.2",
 		"lazyrepo": "0.0.0-alpha.27",
 		"react": "^18.2.0",
 		"react-dom": "^18.2.0",
@@ -47,6 +48,10 @@
 	},
 	"devDependencies": {
 		"@vitejs/plugin-react": "^4.2.0",
-		"dotenv": "^16.0.3"
+		"dotenv": "^16.0.3",
+		"remark": "^15.0.1",
+		"remark-frontmatter": "^5.0.0",
+		"remark-html": "^16.0.1",
+		"vfile-matter": "^5.0.0"
 	}
 }

apps/examples/src/ExamplePage.tsx

@@ -0,0 +1,79 @@
+import { assert, assertExists } from '@tldraw/tldraw'
+import { useEffect, useRef } from 'react'
+import { Link } from 'react-router-dom'
+import ExamplesTldrawLogo from './components/ExamplesTldrawLogo'
+import { ListLink } from './components/ListLink'
+import { Example, examples } from './examples'
+
+export function ExamplePage({
+	example,
+	children,
+}: {
+	example: Example
+	children: React.ReactNode
+}) {
+	const scrollElRef = useRef<HTMLUListElement>(null)
+	const activeElRef = useRef<HTMLLIElement>(null)
+	const isFirstScroll = useRef(true)
+
+	useEffect(() => {
+		const frame = requestAnimationFrame(() => {
+			if (activeElRef.current) {
+				const scrollEl = assertExists(scrollElRef.current)
+				const activeEl = activeElRef.current
+				assert(activeEl.offsetParent === scrollEl)
+
+				const isScrolledIntoView =
+					activeEl.offsetTop >= scrollEl.scrollTop &&
+					activeEl.offsetTop + activeEl.offsetHeight <= scrollEl.scrollTop + scrollEl.offsetHeight
+
+				if (!isScrolledIntoView) {
+					activeEl.scrollIntoView({
+						behavior: isFirstScroll.current ? 'auto' : 'smooth',
+						block: isFirstScroll.current ? 'start' : 'center',
+					})
+				}
+				isFirstScroll.current = false
+			}
+		})
+		return () => cancelAnimationFrame(frame)
+	}, [example])
+
+	return (
+		<div className="example">
+			<div className="example__info">
+				<Link className="example__logo" to="/">
+					<ExamplesTldrawLogo /> examples
+				</Link>
+				<ul className="example__info__list scroll-light" ref={scrollElRef}>
+					{examples
+						.filter((e) => !e.hide)
+						.filter((e) => e.order !== null)
+						.map((e) => (
+							<ListLink
+								key={e.path}
+								ref={e.path === example.path ? activeElRef : undefined}
+								example={e}
+								isActive={e.path === example.path}
+							/>
+						))}
+					<li>
+						<hr />
+					</li>
+					{examples
+						.filter((e) => !e.hide)
+						.filter((e) => e.order === null)
+						.map((e) => (
+							<ListLink
+								key={e.path}
+								ref={e.path === example.path ? activeElRef : undefined}
+								example={e}
+								isActive={e.path === example.path}
+							/>
+						))}
+				</ul>
+			</div>
+			<div className="example__content">{children}</div>
+		</div>
+	)
+}

apps/examples/src/HomePage.tsx

@@ -0,0 +1,35 @@
+import ExamplesTldrawLogo from './components/ExamplesTldrawLogo'
+import { ListLink } from './components/ListLink'
+import { examples } from './examples'
+
+export function HomePage() {
+	return (
+		<div className="examples">
+			<div className="examples__header">
+				<div className="examples__title">
+					<ExamplesTldrawLogo /> examples
+				</div>
+				<p>
+					See docs at <a href="https://tldraw.dev">tldraw.dev</a>
+				</p>
+			</div>
+			<ul className="examples__list">
+				{examples
+					.filter((example) => !example.hide)
+					.filter((example) => example.order !== null)
+					.map((example) => (
+						<ListLink key={example.path} example={example} showDescription />
+					))}
+			</ul>
+			<hr />
+			<ul className="examples__list">
+				{examples
+					.filter((example) => !example.hide)
+					.filter((example) => example.order === null)
+					.map((example) => (
+						<ListLink key={example.path} example={example} showDescription />
+					))}
+			</ul>
+		</div>
+	)
+}

apps/examples/src/components/Icons.tsx

@@ -0,0 +1,13 @@
+export function StandaloneIcon(props: React.SVGProps<SVGSVGElement>) {
+	return (
+		<svg width="16" height="16" viewBox="0 0 30 30" fill="none" {...props}>
+			<path
+				d="M13 5H7C5.89543 5 5 5.89543 5 7V23C5 24.1046 5.89543 25 7 25H23C24.1046 25 25 24.1046 25 23V17M19 5H25M25 5V11M25 5L13 17"
+				stroke="currentColor"
+				strokeWidth="2"
+				strokeLinecap="round"
+				strokeLinejoin="round"
+			/>
+		</svg>
+	)
+}

apps/examples/src/components/ListLink.tsx

@@ -1,14 +1,94 @@
+import classNames from 'classnames'
+import { ForwardedRef, forwardRef, useEffect, useId, useLayoutEffect, useRef } from 'react'
 import { Link } from 'react-router-dom'
+import { Example } from '../examples'
+import { useMergedRefs } from '../hooks/useMegedRefs'
+import { StandaloneIcon } from './Icons'
+import { Markdown } from './Markdown'
 
-export interface ListLinkProps {
-	title: string
-	route: string
-}
+export const ListLink = forwardRef(function ListLink(
+	{
+		example,
+		isActive,
+		showDescription,
+	}: { example: Example; isActive?: boolean; showDescription?: boolean },
+	ref: ForwardedRef<HTMLLIElement>
+) {
+	const id = useId()
+	const containerRef = useRef<HTMLLIElement | null>(null)
+	const wasActiveRef = useRef(isActive)
+	useEffect(() => {
+		wasActiveRef.current = isActive
+	}, [isActive])
+
+	const heightBefore =
+		wasActiveRef.current !== isActive ? containerRef.current?.offsetHeight : undefined
+
+	useLayoutEffect(() => {
+		if (heightBefore !== undefined && containerRef.current) {
+			containerRef.current.animate(
+				[{ height: heightBefore + 'px' }, { height: containerRef.current.offsetHeight + 'px' }],
+				{
+					duration: 120,
+					easing: 'ease-out',
+					fill: 'backwards',
+					delay: 100,
+				}
+			)
+		}
+	}, [heightBefore])
+
+	const mainDetails = (
+		<>
+			<h3 id={id}>
+				{example.title}
+				{isActive && (
+					<Link
+						to={`${example.path}/full`}
+						aria-label="Standalone"
+						className="examples__list__item__standalone"
+						title="View standalone example"
+					>
+						<StandaloneIcon />
+					</Link>
+				)}
+			</h3>
+			{showDescription && <Markdown sanitizedHtml={example.description} />}
+		</>
+	)
+
+	// TODO: re-enable code sandbox links
+	// const codeSandboxPath = encodeURIComponent(
+	// 	`/src/examples${example.path}${example.componentFile.replace(/^\./, '')}`
+	// )
+	const extraDetails = (
+		<div className="examples__list__item__details" aria-hidden={!isActive}>
+			<Markdown sanitizedHtml={example.details} />
+			<div className="examples__list__item__code">
+				<a href={example.codeUrl} target="_blank" rel="noreferrer">
+					View code
+				</a>
+				{/* <a
+					href={`https://codesandbox.io/p/devbox/github/tldraw/tldraw/tree/examples/?file=${codeSandboxPath}`}
+					target="_blank"
+					rel="noreferrer"
+				>
+					Edit in CodeSandbox
+				</a> */}
+			</div>
+		</div>
+	)
 
-export function ListLink({ title, route }: ListLinkProps) {
 	return (
-		<li className="examples__list__item">
-			<Link to={route}>{title}</Link>
+		<li
+			ref={useMergedRefs(ref, containerRef)}
+			className={classNames('examples__list__item', isActive && 'examples__list__item__active')}
+		>
+			{!isActive && (
+				<Link to={example.path} aria-labelledby={id} className="examples__list__item__link" />
+			)}
+			{mainDetails}
+			{extraDetails}
 		</li>
 	)
-}
+})

apps/examples/src/components/Markdown.tsx

@@ -0,0 +1,16 @@
+import classNames from 'classnames'
+
+export function Markdown({
+	sanitizedHtml,
+	className = '',
+}: {
+	sanitizedHtml: string
+	className?: string
+}) {
+	return (
+		<div
+			className={classNames('examples__markdown', className)}
+			dangerouslySetInnerHTML={{ __html: sanitizedHtml }}
+		/>
+	)
+}

apps/examples/src/components/Spinner.tsx

@@ -0,0 +1,19 @@
+export function Spinner(props: React.SVGProps<SVGSVGElement>) {
+	return (
+		<svg width={16} height={16} viewBox="0 0 16 16" {...props}>
+			<g strokeWidth={2} fill="none" fillRule="evenodd">
+				<circle strokeOpacity={0.25} cx={8} cy={8} r={7} stroke="currentColor" />
+				<path strokeLinecap="round" d="M15 8c0-4.5-4.5-7-7-7" stroke="currentColor">
+					<animateTransform
+						attributeName="transform"
+						type="rotate"
+						from="0 8 8"
+						to="360 8 8"
+						dur="1s"
+						repeatCount="indefinite"
+					/>
+				</path>
+			</g>
+		</svg>
+	)
+}

apps/examples/src/examples.tsx

@@ -0,0 +1,28 @@
+import { ComponentType } from 'react'
+
+export type Example = {
+	title: string
+	description: string
+	details: string
+	path: string
+	codeUrl: string
+	hide: boolean
+	order: number | null
+	componentFile: string
+	loadComponent: () => Promise<ComponentType>
+}
+
+export const examples = (
+	Object.values(import.meta.glob('./examples/*/README.md', { eager: true })) as Example[]
+).sort((a, b) => {
+	// sort by order then title:
+	if (a.order === b.order) {
+		return a.title.localeCompare(b.title)
+	} else if (a.order === null) {
+		return 1
+	} else if (b.order === null) {
+		return -1
+	} else {
+		return a.order - b.order
+	}
+})

apps/examples/src/examples/api/README.md

@@ -0,0 +1,11 @@
+---
+title: Editor API
+component: ./APIExample.tsx
+order: 2
+---
+
+Manipulate the contents of the canvas using the editor API.
+
+---
+
+This example creates and updates shapes, selects and rotates them, and zooms the camera.

apps/examples/src/examples/asset-props/README.md

@@ -0,0 +1,10 @@
+---
+title: Asset props
+component: ./AssetPropsExample.tsx
+---
+
+Control the assets (images, videos, etc.) that can be added to the canvas.
+
+---
+
+This example demonstrates the `<Tldraw/>` component's props that give you control over assets: which types are allowed, the maximum size, and maximum dimensions.

apps/examples/src/examples/canvas-events/CanvasEventsExample.tsx

@@ -11,17 +11,16 @@ export default function CanvasEventsExample() {
 
 	return (
 		<div style={{ display: 'flex' }}>
-			<div style={{ width: '50vw', height: '100vh' }}>
+			<div style={{ width: '50%', height: '100vh' }}>
 				<Tldraw
 					onMount={(editor) => {
 						editor.on('event', (event) => handleEvent(event))
 					}}
 				/>
 			</div>
-			<div>
 			<div
 				style={{
-						width: '50vw',
+					width: '50%',
 					height: '100vh',
 					padding: 8,
 					background: '#eee',
@@ -40,6 +39,5 @@ export default function CanvasEventsExample() {
 				))}
 			</div>
 		</div>
-		</div>
 	)
 }

apps/examples/src/examples/canvas-events/README.md

@@ -0,0 +1,10 @@
+---
+title: Canvas events
+component: ./CanvasEventsExample.tsx
+---
+
+Listen to events from tldraw's canvas.
+
+---
+
+These are the input events that the editor interprets. Try moving your cursor, dragging, using modifier keys, etc.

apps/examples/src/examples/custom-components/README.md

@@ -0,0 +1,12 @@
+---
+title: Canvas components
+component: ./CustomComponentsExample.tsx
+---
+
+Replace tldraw's on-canvas UI with your own.
+
+---
+
+Tldraw's on-canvas UI is build from replaceable React components.
+
+Try dragging to select or using the eraser tool to see the custom components in this example.

apps/examples/src/examples/custom-config/README.md

@@ -0,0 +1,11 @@
+---
+title: Custom shapes / tools
+component: ./CustomConfigExample.tsx
+order: 3
+---
+
+Create custom shapes / tools
+
+---
+
+The card shape (select ⚫️ in the toolbar) is a custom shape - but also just a normal react component.

apps/examples/src/examples/custom-styles/README.md

@@ -0,0 +1,10 @@
+---
+title: Custom styles
+component: ./CustomStylesExample.tsx
+---
+
+Styles are special properties that can be set on many shapes at once.
+
+---
+
+Create several shapes with the ⚫️ tool, then select them and try changing their filter style.

apps/examples/src/examples/custom-ui/README.md

@@ -0,0 +1,10 @@
+---
+title: Custom UI
+component: ./CustomUiExample.tsx
+---
+
+Replace tldraw's UI with your own.
+
+---
+
+This UI has keyboard shortcuts and buttons for selecting tools.

apps/examples/src/examples/develop/README.md

@@ -0,0 +1,11 @@
+---
+title: Basic (development)
+component: ./BasicExample.tsx
+order: 1
+---
+
+The easiest way to get started with tldraw.
+
+---
+
+The simplest use of the `<Tldraw/>` component.

apps/examples/src/examples/error-boundary/README.md

@@ -0,0 +1,10 @@
+---
+title: Error boundary
+component: ./ErrorBoundaryExample.tsx
+---
+
+Catch errors in shapes.
+
+---
+
+When something goes wrong in a shape, it won't crash the whole editor - just the shape that went wrong.

apps/examples/src/examples/exploded/README.md

@@ -0,0 +1,10 @@
+---
+title: Sublibraries
+component: ./ExplodedExample.tsx
+---
+
+Tldraw is built from several sublibraries - like the editor, default shapes & tools, and UI.
+
+---
+
+For full customization, you can use these sublibraries directly, or replace them with your own.

apps/examples/src/examples/external-content-sources/README.md

@@ -0,0 +1,10 @@
+---
+title: External content sources
+component: ./ExternalContentSourcesExample.tsx
+---
+
+Control what happens when the user pastes content into the editor.
+
+---
+
+In this example, we register a special handler for when the user pastes in 'text/html' content. We add it to a special shape type that renders the html content directly.

apps/examples/src/examples/floaty-window/README.md

@@ -0,0 +1,5 @@
+---
+title: Floaty window
+hide: true
+component: ./FloatyExample.tsx
+---

apps/examples/src/examples/force-mobile/README.md

@@ -0,0 +1,6 @@
+---
+title: Force mobile breakpoint
+component: ./ForceBreakpointExample
+---
+
+Force the editor UI to render as if it were on a mobile device.

apps/examples/src/examples/hide-ui/README.md

@@ -0,0 +1,10 @@
+---
+title: Hide UI
+component: ./HideUiExample.tsx
+---
+
+Hide tldraw's UI with the `hideUi` prop.
+
+---
+
+Useful for a bare-bones editor, or if you want to build your own UI.

apps/examples/src/examples/hosted-images/README.md

@@ -0,0 +1,5 @@
+---
+title: Hosted images
+component: ./HostedImagesExample.tsx
+hide: true
+---

apps/examples/src/examples/local-images/LocalImagesExample.tsx

@@ -5,7 +5,7 @@ import { useCallback } from 'react'
 // This is an example of how you can add an image to the editor. The image is already
 // present in the `public` folder, so we can just use it directly.
 // If you want to allow users to upload the images please take a look at the `HostedImagesExample.tsx`
-export default function ImageExample() {
+export default function LocalImagesExample() {
 	const handleMount = useCallback((editor: Editor) => {
 		// Assets are records that store data about shared assets like images, videos, etc.
 		// Each image has an associated asset record, so we'll create that first.
@@ -22,7 +22,7 @@ export default function ImageExample() {
 				typeName: 'asset',
 				props: {
 					name: 'tldraw.png',
-					src: '/tldraw.png',
+					src: '/tldraw.png', // You could also use a base64 encoded string here
 					w: imageWidth,
 					h: imageHeight,
 					mimeType: 'image/png',
@@ -51,7 +51,10 @@ export default function ImageExample() {
 
 	return (
 		<div className="tldraw__editor">
-			<Tldraw persistenceKey="tldraw_example" onMount={handleMount} />
+			<Tldraw
+				// persistenceKey="tldraw_local_images_example"
+				onMount={handleMount}
+			/>
 		</div>
 	)
 }

apps/examples/src/examples/local-images/README.md

@@ -0,0 +1,11 @@
+---
+title: Local images
+component: ./LocalImagesExample.tsx
+hide: false
+---
+
+How to use local images in the built-in `ImageShape` shape.
+
+---
+
+This example shows how to use local images in the built-in `ImageShape` shape. You must first create an asset that holds the source of the image, then create a shape that references the asset.

apps/examples/src/examples/meta-on-change/OnChangeShapeMetaExample.tsx

@@ -1,19 +1,16 @@
 import { Tldraw } from '@tldraw/tldraw'
 import '@tldraw/tldraw/tldraw.css'
 
-export default function MetaExample() {
+export default function OnChangeShapeMetaExample() {
 	return (
 		<div className="tldraw__editor">
 			<Tldraw
 				persistenceKey="tldraw_example"
 				onMount={(editor) => {
-					// There's no API for setting getInitialMetaForShape yet, but
-					// you can replace it at runtime like this. This will run for
-					// all shapes created by the user.
+					// See the "meta-on-create" example for more about setting the
+					// initial meta for a shape.
 					editor.getInitialMetaForShape = (_shape) => {
 						return {
-							createdBy: editor.user.getId(),
-							createdAt: Date.now(),
 							updatedBy: editor.user.getId(),
 							updatedAt: Date.now(),
 						}
@@ -21,14 +18,13 @@ export default function MetaExample() {
 					// We can also use the sideEffects API to modify a shape before
 					// its change is committed to the database. This will run for
 					// all shapes whenever they are updated.
-					editor.sideEffects.registerBeforeChangeHandler('shape', (record, _prev, source) => {
-						if (source !== 'user') return record
-						record.meta = {
-							...record.meta,
+					editor.sideEffects.registerBeforeChangeHandler('shape', (_prev, next, source) => {
+						if (source !== 'user') return next
+						next.meta = {
 							updatedBy: editor.user.getId(),
 							updatedAt: Date.now(),
 						}
-						return record
+						return next
 					})
 				}}
 			/>

apps/examples/src/examples/meta-on-change/README.md

@@ -0,0 +1,10 @@
+---
+title: Shape Meta (on change)
+component: ./OnChangeShapeMetaExample.tsx
+---
+
+Add custom metadata to shapes when they're changed.
+
+---
+
+In this example, we add updatedAt metadata to shapes when they're updated.

apps/examples/src/examples/meta-on-create/OnCreateShapeMetaExample.tsx

@@ -0,0 +1,23 @@
+import { Tldraw } from '@tldraw/tldraw'
+import '@tldraw/tldraw/tldraw.css'
+
+export default function OnCreateShapeMetaExample() {
+	return (
+		<div className="tldraw__editor">
+			<Tldraw
+				persistenceKey="tldraw_example"
+				onMount={(editor) => {
+					// There's no API for setting getInitialMetaForShape yet, but
+					// you can replace it at runtime like this. This will run for
+					// all shapes created by the user.
+					editor.getInitialMetaForShape = (_shape) => {
+						return {
+							createdBy: editor.user.getId(),
+							createdAt: Date.now(),
+						}
+					}
+				}}
+			/>
+		</div>
+	)
+}

apps/examples/src/examples/meta-on-create/README.md

@@ -0,0 +1,10 @@
+---
+title: Shape Meta (on create)
+component: ./OnCreateShapeMetaExample.tsx
+---
+
+Add custom metadata to shapes when they're created.
+
+---
+
+In this example, we add createdBy and createdAt metadata to shapes when they're created.

apps/examples/src/examples/multiple/README.md

@@ -0,0 +1,6 @@
+---
+title: Multiple editors
+component: ./MultipleExample.tsx
+---
+
+Use multiple <Tldraw/> components on the same page.

apps/examples/src/examples/only-editor/README.md

@@ -0,0 +1,10 @@
+---
+title: Minimal
+component: ./OnlyEditor.tsx
+---
+
+Use the `<TldrawEditor/>` component to render a bare-bones editor with minimal built-in shapes and tools.
+
+---
+
+This example show show the `<TldrawEditor/>` component can be used to render a bare-bones editor. It uses minimal built-in shapes and tools.

apps/examples/src/examples/persistence/README.md

@@ -0,0 +1,11 @@
+---
+title: Persistence
+component: ./PersistenceExample.tsx
+order: 5
+---
+
+Save the contents of the editor
+
+---
+
+In this example, we load the contents of the editor from your browser's localStorage, and save it there when you make changes.

apps/examples/src/examples/readonly/README.md

@@ -0,0 +1,10 @@
+---
+title: Readonly
+component: ./ReadOnlyExample
+---
+
+Use the editor in readonly mode.
+
+---
+
+Users can still pan and zoom the canvas, but they can't change the contents.

apps/examples/src/examples/screenshot-tool/README.md

@@ -0,0 +1,10 @@
+---
+title: Custom tool (screenshot)
+component: ./ScreenshotToolExample.tsx
+---
+
+Draw a box on the canvas to capture a screenshot of that area.
+
+---
+
+Tools are the parts of tldraw's state chart. Most interactions in tldraw are tools.

apps/examples/src/examples/screenshot-tool/ScreenshotToolExample.tsx

@@ -4,6 +4,7 @@ import {
 	TLUiAssetUrlOverrides,
 	TLUiOverrides,
 	Tldraw,
+	Vec2d,
 	toolbarItem,
 	useEditor,
 	useValue,
@@ -68,7 +69,10 @@ function ScreenshotBox() {
 			// "page space", i.e. uneffected by scale, and relative to the tldraw
 			// page's top left corner.
 			const zoomLevel = editor.getZoomLevel()
-			const { x, y } = editor.pageToScreen({ x: box.x, y: box.y })
+			const { x, y } = Vec2d.Sub(
+				editor.pageToScreen({ x: box.x, y: box.y }),
+				editor.getViewportScreenBounds()
+			)
 			return new Box2d(x, y, box.w * zoomLevel, box.h * zoomLevel)
 		},
 		[editor]

apps/examples/src/examples/scroll/README.md

@@ -0,0 +1,10 @@
+---
+title: Scrolling container
+component: ./ScrollExample.tsx
+---
+
+Use the editor inside a scrollable container.
+
+---
+
+Tldraw doesn't have to be full screen.

apps/examples/src/examples/shape-meta/README.md

@@ -0,0 +1,10 @@
+---
+title: Shape meta
+component: ./ShapeMetaExample.tsx
+---
+
+Add a label to shapes with the meta property.
+
+---
+
+Select a shape and try changing its label. The label is stored in the shape's meta property, which can be used to add custom data to any shape.

apps/examples/src/examples/snapshots/README.md

@@ -0,0 +1,10 @@
+---
+title: Snapshots
+component: ./SnapshotExample.tsx
+---
+
+Load a snapshot of the editor's contents.
+
+---
+
+Use `editor.store.getSnapshot()` and `editor.store.loadSnapshot()` to save and restore the editor's contents.

apps/examples/src/examples/speech-bubble/CustomShapeWithHandles.tsx

@@ -10,7 +10,7 @@ const tools = [SpeechBubbleTool]
 
 export default function CustomShapeWithHandles() {
 	return (
-		<div style={{ position: 'fixed', inset: 0 }}>
+		<div style={{ position: 'absolute', inset: 0 }}>
 			<Tldraw
 				shapeUtils={shapeUtils}
 				tools={tools}

apps/examples/src/examples/speech-bubble/README.md

@@ -0,0 +1,6 @@
+---
+title: Speech bubble
+component: ./CustomShapeWithHandles.tsx
+---
+
+A custom shape with handles

apps/examples/src/examples/store-events/README.md

@@ -0,0 +1,10 @@
+---
+title: Store events
+component: ./StoreEventsExample.tsx
+---
+
+Listen to changes from tldraw's store.
+
+---
+
+Try creating & deleting shapes, or switching pages. The changes will be logged next to the canvas.

apps/examples/src/examples/store-events/StoreEventsExample.tsx

@@ -57,13 +57,12 @@ export default function StoreEventsExample() {
 
 	return (
 		<div style={{ display: 'flex' }}>
-			<div style={{ width: '60vw', height: '100vh' }}>
+			<div style={{ width: '60%', height: '100vh' }}>
 				<Tldraw onMount={setAppToState} />
 			</div>
-			<div>
 			<div
 				style={{
-						width: '40vw',
+					width: '40%',
 					height: '100vh',
 					padding: 8,
 					background: '#eee',
@@ -81,6 +80,5 @@ export default function StoreEventsExample() {
 				))}
 			</div>
 		</div>
-		</div>
 	)
 }

apps/examples/src/examples/things-on-the-canvas/OnTheCanvas.tsx

@@ -1,4 +1,11 @@
-import { stopEventPropagation, Tldraw, TLEditorComponents, track, useEditor } from '@tldraw/tldraw'
+import {
+	stopEventPropagation,
+	Tldraw,
+	TLEditorComponents,
+	track,
+	useEditor,
+	Vec2d,
+} from '@tldraw/tldraw'
 import '@tldraw/tldraw/tldraw.css'
 import { useState } from 'react'
 
@@ -55,7 +62,10 @@ const MyComponentInFront = track(() => {
 
 	if (!selectionRotatedPageBounds) return null
 
-	const pageCoordinates = editor.pageToScreen(selectionRotatedPageBounds.point)
+	const pageCoordinates = Vec2d.Sub(
+		editor.pageToScreen(selectionRotatedPageBounds.point),
+		editor.getViewportScreenBounds()
+	)
 
 	return (
 		<div

apps/examples/src/examples/things-on-the-canvas/README.md

@@ -0,0 +1,10 @@
+---
+title: Things on the canvas
+component: ./OnTheCanvas.tsx
+---
+
+Add custom components to the editor
+
+---
+
+Components can either float on top of the canvas unaffected by the camera, or be a part of the canvas itself.

apps/examples/src/examples/ui-events/README.md

@@ -0,0 +1,10 @@
+---
+title: UI events
+component: ./UiEventsExample.tsx
+---
+
+Listen to events from tldraw's UI.
+
+---
+
+Try selecting tools, using keyboard shortcuts, undo/redo, etc. Events will be logged next to the canvas.

apps/examples/src/examples/ui-events/UiEventsExample.tsx

@@ -11,13 +11,12 @@ export default function UiEventsExample() {
 
 	return (
 		<div style={{ display: 'flex' }}>
-			<div style={{ width: '60vw', height: '100vh' }}>
+			<div style={{ width: '60%', height: '100vh' }}>
 				<Tldraw onUiEvent={handleUiEvent} />
 			</div>
-			<div>
 			<div
 				style={{
-						width: '40vw',
+					width: '40%',
 					height: '100vh',
 					padding: 8,
 					background: '#eee',
@@ -35,6 +34,5 @@ export default function UiEventsExample() {
 				))}
 			</div>
 		</div>
-		</div>
 	)
 }

apps/examples/src/examples/user-presence/README.md

@@ -0,0 +1,12 @@
+---
+title: User presence
+component: ./UserPresenceExample.tsx
+---
+
+Show other users editing the same document.
+
+---
+
+Here, we add fake InstancePresence records to the store to simulate other users.
+
+If you have your own presence system, you could add real records to the store in the same way.

apps/examples/src/examples/zones/README.md

@@ -0,0 +1,12 @@
+---
+title: UI zones
+component: ./ZonesExample.tsx
+---
+
+Inject custom components into tldraw's UI.
+
+---
+
+Our default UI has two empty "zones" - the `topZone` (in the top-center of the screen) and `shareZone` (in the top right).
+
+You can set these zones to any React component you want.

apps/examples/src/hooks/useMegedRefs.tsx

@@ -0,0 +1,16 @@
+import { ForwardedRef, useCallback } from 'react'
+
+export function useMergedRefs<T>(...refs: ForwardedRef<T>[]) {
+	return useCallback(
+		(node: T) => {
+			for (const ref of refs) {
+				if (typeof ref === 'function') {
+					ref(node)
+				} else if (ref != null) {
+					ref.current = node
+				}
+			}
+		},
+		[refs]
+	)
+}

apps/examples/src/index.tsx

@@ -5,46 +5,12 @@ import {
 	setDefaultEditorAssetUrls,
 	setDefaultUiAssetUrls,
 } from '@tldraw/tldraw'
-import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
 import { RouterProvider, createBrowserRouter } from 'react-router-dom'
-
-import ExamplesTldrawLogo from './components/ExamplesTldrawLogo'
-import { ListLink } from './components/ListLink'
-
-import BasicExample from './BasicExample'
-import APIExample from './examples/APIExample'
-import AssetPropsExample from './examples/AssetOptionsExample'
-import CanvasEventsExample from './examples/CanvasEventsExample'
-import CustomComponentsExample from './examples/CustomComponentsExample'
-import CustomConfigExample from './examples/CustomConfigExample/CustomConfigExample'
-import CustomShapeWithHandles from './examples/CustomShapeWithHandles/CustomShapeWithHandles'
-import CustomStylesExample from './examples/CustomStylesExample/CustomStylesExample'
-import CustomUiExample from './examples/CustomUiExample/CustomUiExample'
-import ErrorBoundaryExample from './examples/ErrorBoundaryExample/ErrorBoundaryExample'
-import ExplodedExample from './examples/ExplodedExample'
-import ExternalContentSourcesExample from './examples/ExternalContentSourcesExample'
-import FloatyExample from './examples/FloatyExample'
-import ForceMobileExample from './examples/ForceBreakpointExample'
-import HideUiExample from './examples/HideUiExample'
-import HostedImagesExample from './examples/HostedImagesExample'
-import ImageExample from './examples/ImagesExamples'
-import MetaExample from './examples/MetaExample'
-import MultipleExample from './examples/MultipleExample'
-import OnTheCanvasExample from './examples/OnTheCanvas'
-import PersistenceExample from './examples/PersistenceExample'
-import ReadOnlyExample from './examples/ReadOnlyExample'
-import ScreenshotToolExample from './examples/ScreenshotToolExample/ScreenshotToolExample'
-import ScrollExample from './examples/ScrollExample'
-import ShapeMetaExample from './examples/ShapeMetaExample'
-import SnapshotExample from './examples/SnapshotExample/SnapshotExample'
-import StoreEventsExample from './examples/StoreEventsExample'
-import UiEventsExample from './examples/UiEventsExample'
-import UserPresenceExample from './examples/UserPresenceExample'
-import ZonesExample from './examples/ZonesExample'
-import EndToEnd from './examples/end-to-end/end-to-end'
-import OnlyEditorExample from './examples/only-editor/OnlyEditor'
-import YjsExample from './examples/yjs/YjsExample'
+import { ExamplePage } from './ExamplePage'
+import { HomePage } from './HomePage'
+import { examples } from './examples'
+import EndToEnd from './testing/end-to-end'
 
 // This example is only used for end to end tests
 
@@ -54,219 +20,50 @@ const assetUrls = getAssetUrlsByMetaUrl()
 setDefaultEditorAssetUrls(assetUrls)
 setDefaultUiAssetUrls(assetUrls)
 
-type Example = {
-	path: string
-	title?: string
-	element: JSX.Element
-}
-
-export const allExamples: Example[] = [
+const router = createBrowserRouter([
 	{
-		title: 'Basic (development)',
-		path: 'develop',
-		element: <BasicExample />,
+		path: '/',
+		element: <HomePage />,
 	},
-	{
-		title: 'Collaboration (with Yjs)',
-		path: 'yjs',
-		element: <YjsExample />,
-	},
-	{
-		title: 'Editor API',
-		path: 'api',
-		element: <APIExample />,
-	},
-	{
-		title: 'Multiple editors',
-		path: 'multiple',
-		element: <MultipleExample />,
-	},
-	{
-		title: 'Meta Example',
-		path: 'meta',
-		element: <MetaExample />,
-	},
-	{
-		title: 'Readonly Example',
-		path: 'readonly',
-		element: <ReadOnlyExample />,
-	},
-	{
-		title: 'Things on the canvas',
-		path: 'things-on-the-canvas',
-		element: <OnTheCanvasExample />,
-	},
-	{
-		title: 'Scroll example',
-		path: 'scroll',
-		element: <ScrollExample />,
-	},
-	{
-		title: 'Custom shapes / tools',
-		path: 'custom-config',
-		element: <CustomConfigExample />,
-	},
-	{
-		title: 'Sublibraries',
-		path: 'exploded',
-		element: <ExplodedExample />,
-	},
-	{
-		title: 'Error boundary',
-		path: 'error-boundary',
-		element: <ErrorBoundaryExample />,
-	},
-	{
-		title: 'Custom UI',
-		path: 'custom-ui',
-		element: <CustomUiExample />,
-	},
-	{
-		title: 'Custom Tool (Screenshot)',
-		path: 'screenshot-tool',
-		element: <ScreenshotToolExample />,
-	},
-	{
-		title: 'Hide UI',
-		path: 'hide-ui',
-		element: <HideUiExample />,
-	},
-	{
-		title: 'UI components',
-		path: 'custom-components',
-		element: <CustomComponentsExample />,
-	},
-	{
-		title: 'UI events',
-		path: 'ui-events',
-		element: <UiEventsExample />,
-	},
-	{
-		title: 'Canvas events',
-		path: 'canvas-events',
-		element: <CanvasEventsExample />,
-	},
-	{
-		title: 'Store events',
-		path: 'store-events',
-		element: <StoreEventsExample />,
-	},
-	{
-		title: 'User presence',
-		path: 'user-presence',
-		element: <UserPresenceExample />,
-	},
-	{
-		title: 'UI zones',
-		path: 'zones',
-		element: <ZonesExample />,
-	},
-	{
-		title: 'Persistence',
-		path: 'persistence',
-		element: <PersistenceExample />,
-	},
-	{
-		title: 'Snapshots',
-		path: 'snapshots',
-		element: <SnapshotExample />,
-	},
-	{
-		title: 'Force mobile breakpoint',
-		path: 'force-mobile',
-		element: <ForceMobileExample />,
-	},
-	{
-		title: 'Custom styles',
-		path: 'custom-styles',
-		element: <CustomStylesExample />,
-	},
-	{
-		title: 'Shape meta property',
-		path: 'shape-meta',
-		element: <ShapeMetaExample />,
-	},
-	{
-		title: 'Only editor',
-		path: 'only-editor',
-		element: <OnlyEditorExample />,
-	},
-	{
-		title: 'Adding images',
-		path: 'images',
-		element: <ImageExample />,
-	},
-	{
-		title: 'Hosted images example',
-		path: 'hosted-images',
-		element: <HostedImagesExample />,
-	},
-	{
-		title: 'Asset props',
-		path: 'asset-props',
-		element: <AssetPropsExample />,
-	},
-	{
-		title: 'Floaty window',
-		path: 'floaty-window',
-		element: <FloatyExample />,
-	},
-	{
-		title: 'External content sources',
-		path: 'external-content-sources',
-		element: <ExternalContentSourcesExample />,
-	},
-	{
-		title: 'Custom Shape With Handles',
-		path: 'custom-shape-with-handles',
-		element: <CustomShapeWithHandles />,
-	},
-	// not listed
 	{
 		path: 'end-to-end',
 		element: <EndToEnd />,
 	},
-]
-
-function App() {
-	return (
-		<div className="examples">
-			<div className="examples__header">
-				<ExamplesTldrawLogo />
-				<p>
-					See docs at <a href="https://tldraw.dev">tldraw.dev</a>
-				</p>
-			</div>
-			<ul className="examples__list">
-				{allExamples
-					.filter((example) => example.title)
-					.map((example) => (
-						<ListLink key={example.path} title={example.title!} route={example.path} />
-					))}
-			</ul>
-		</div>
-	)
-}
-
-const router = createBrowserRouter([
+	...examples.flatMap((example) => [
 		{
-		path: '/',
-		element: <App />,
+			path: example.path,
+			lazy: async () => {
+				const Component = await example.loadComponent()
+				return {
+					element: (
+						<ExamplePage example={example}>
+							<Component />
+						</ExamplePage>
+					),
+				}
 			},
-	...allExamples,
+		},
+		{
+			path: `${example.path}/full`,
+			lazy: async () => {
+				const Component = await example.loadComponent()
+				return {
+					element: <Component />,
+				}
+			},
+		},
+	]),
 ])
 
 document.addEventListener('DOMContentLoaded', () => {
 	const rootElement = document.getElementById('root')!
 	const root = createRoot(rootElement!)
 	root.render(
-		<StrictMode>
 		<ErrorBoundary
 			fallback={(error) => <DefaultErrorFallback error={error} />}
 			onError={(error) => console.error(error)}
 		>
 			<RouterProvider router={router} />
 		</ErrorBoundary>
-		</StrictMode>
 	)
 })

apps/examples/src/styles.css

@@ -1,4 +1,4 @@
-@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500&display=swap');
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');
 
 html,
 body {
@@ -13,6 +13,12 @@ body {
 	min-height: -webkit-fill-available;
 	height: 100%;
 }
+@media screen and (max-width: 600px) {
+	html,
+	body {
+		font-size: 14px;
+	}
+}
 
 html,
 * {
@@ -20,45 +26,258 @@ html,
 }
 
 .tldraw__editor {
-	position: fixed;
+	position: absolute;
 	inset: 0px;
 	overflow: hidden;
 }
 
 .examples {
-	padding: 16px;
+	padding: 1.5rem;
+	max-width: 1080px;
+	margin: 0 auto;
+}
+
+.examples hr {
+	border: none;
+	border-top: 1px solid #e8e8e8;
+	margin: 0;
 }
 
 .examples__header {
-	width: fit-content;
-	padding-bottom: 32px;
+	padding-bottom: 2rem;
+	display: flex;
+	align-items: center;
+}
+@media screen and (max-width: 500px) {
+	.examples__header {
+		flex-direction: column;
+		align-items: flex-start;
+		padding-bottom: 1rem;
+	}
+}
+.examples__title {
+	display: flex;
+	align-items: center;
+	margin-right: auto;
+	font-size: 1.45rem;
 }
-
 .examples__lockup {
-	height: 56px;
+	height: 1.875rem;
 	width: auto;
+	margin-right: 0.5rem;
 }
 
 .examples__list {
-	display: flex;
-	flex-direction: column;
+	display: grid;
+	grid-template-columns: repeat(1, 1fr);
 	padding: 0;
-	margin: 0;
+	margin: 0 -1.5rem 0 -1.5rem;
 	list-style: none;
+	gap: 0rem;
+}
+
+@media screen and (max-width: 800px) {
+	.examples__list {
+		grid-template-columns: repeat(1, 1fr);
+	}
+}
+
+@media screen and (max-width: 600px) {
+	.examples__list {
+		grid-template-columns: repeat(1, 1fr);
+	}
 }
 
 .examples__list__item {
-	padding: 8px 12px;
-	margin: 0px -12px;
+	overflow: hidden;
+	position: relative;
+	padding: 1.5rem;
+}
+.examples__list__item__link {
+	position: absolute;
+	inset: 0;
+	z-index: 1;
+	cursor: pointer;
 }
 
-.examples__list__item a {
-	padding: 8px 12px;
-	margin: 0px -12px;
+.examples__list__item__active {
+	display: block;
+	padding: 1.5rem;
 	text-decoration: none;
 	color: inherit;
+	width: 100%;
+	position: relative;
 }
 
-.examples__list__item a:hover {
-	text-decoration: underline;
+.examples__list__item::before {
+	content: ' ';
+	position: absolute;
+	inset: 0.5rem;
+	border-radius: 6px;
+	background: #f5f5f5;
+	z-index: -1;
+	opacity: 0;
+	transition: opacity 0.12s ease-in-out;
+}
+.examples__list__item:hover::before,
+.examples__list__item__active::before {
+	opacity: 1;
+}
+
+.examples__list__item h3 {
+	all: unset;
+	font-weight: 700;
+	font-size: 1rem;
+	margin: 0.25rem 0rem;
+	display: flex;
+	align-items: center;
+	justify-content: space-between;
+}
+.examples__list__item__details {
+	margin-top: 1rem;
+	position: absolute;
+	left: 1rem;
+	right: 1rem;
+	opacity: 0;
+	transition: opacity 0.12s ease-in-out;
+}
+.examples__list__item__active .examples__list__item__details {
+	position: static;
+	opacity: 1;
+	transition-delay: 0.1s;
+}
+.examples__list__item__standalone {
+	color: inherit;
+	opacity: 0.8;
+	padding: 0.5rem;
+	margin: -0.5rem;
+	display: block;
+	width: 16px;
+	height: 16px;
+	box-sizing: content-box;
+}
+.examples__list__item__code {
+	margin-top: 0.5rem;
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	gap: 0.5rem;
+}
+.examples__list__item__code a {
+	margin-top: 0.5rem;
+	padding: 0.5rem 0.5rem;
+	border-radius: 6px;
+	background-color: white;
+	display: flex;
+	flex: 1 1 auto;
+	text-align: center;
+	align-items: center;
+	justify-content: center;
+	color: inherit;
+	text-decoration: none;
+	box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.12), 0px 1px 3px rgba(0, 0, 0, 0.04);
+}
+
+.example {
+	position: absolute;
+	inset: 0;
+	display: flex;
+	align-items: stretch;
+}
+.example__info {
+	width: 25vw;
+	max-width: 300px;
+	position: relative;
+	z-index: 1;
+	border-right: 1px solid #e8e8e8;
+	display: flex;
+	flex-direction: column;
+	height: 100%;
+	flex: none;
+}
+@media screen and (max-width: 800px) {
+	.example__info {
+		display: none;
+	}
+}
+.example__logo {
+	all: unset;
+	cursor: pointer;
+	flex: none;
+	font-size: 1.15rem;
+	display: flex;
+	align-items: center;
+	justify-content: start;
+	padding: calc(1rem - 0.5px) 1rem;
+}
+.example__logo .examples__lockup {
+	height: 1.5rem;
+}
+.example__info__list {
+	flex: auto;
+	margin: 0;
+	list-style: none;
+	padding: 0;
+	overflow: auto;
+	position: relative;
+	font-size: 13px;
+}
+.example__info__list .examples__list__item {
+	padding: 0.75rem 1rem;
+}
+.example__info__list .examples__list__item::before {
+	inset-block: 0.25rem;
+	inset-inline: 0.5rem;
+}
+.example__info__list h3 {
+	font-size: 14px;
+}
+.example__content {
+	flex: 1 1 auto;
+	position: relative;
+	z-index: 0;
+	overflow: auto;
+}
+
+.examples__markdown p {
+	all: unset;
+	display: block;
+}
+.examples__markdown p:not(:last-child) {
+	margin-bottom: 0.5rem;
+}
+
+.scroll-light {
+	scrollbar-width: thin;
+}
+.scroll-light::-webkit-scrollbar {
+	display: block;
+	width: 8px;
+	height: 8px;
+	position: absolute;
+	top: 0;
+	left: 0;
+	background-color: inherit;
+}
+.scroll-light::-webkit-scrollbar-button {
+	display: none;
+	width: 0;
+	height: 10px;
+}
+.scroll-light::-webkit-scrollbar-thumb {
+	background-clip: padding-box;
+	width: 0;
+	min-height: 36px;
+	border: 2px solid transparent;
+	border-radius: 6px;
+	background-color: rgba(0, 0, 0, 0.25);
+}
+.scroll-light::-webkit-scrollbar-thumb:hover {
+	background-color: rgba(0, 0, 0, 0.3);
+}
+
+.example__info__list hr {
+	border: none;
+	border-top: 1px solid #e8e8e8;
+	margin: 0;
 }

apps/examples/src/vite-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="vite/client" />

apps/examples/vite.config.ts

@@ -1,9 +1,9 @@
 import react from '@vitejs/plugin-react'
 import path from 'path'
-import { defineConfig } from 'vite'
+import { PluginOption, defineConfig } from 'vite'
 
 export default defineConfig({
-	plugins: [react()],
+	plugins: [react(), exampleReadmePlugin()],
 	root: path.join(__dirname, 'src'),
 	publicDir: path.join(__dirname, 'public'),
 	build: {
@@ -21,3 +21,81 @@ export default defineConfig({
 		'process.env.TLDRAW_ENV': JSON.stringify(process.env.VERCEL_ENV ?? 'development'),
 	},
 })
+
+function exampleReadmePlugin(): PluginOption {
+	return {
+		name: 'example-readme',
+		async transform(src, id) {
+			const match = id.match(/examples\/src\/examples\/(.*)\/README.md$/)
+			if (!match) return
+
+			const remark = (await import('remark')).remark
+			const remarkFrontmatter = (await import('remark-frontmatter')).default
+			const remarkHtml = (await import('remark-html')).default
+			const matter = (await import('vfile-matter')).matter
+
+			const file = await remark()
+				.use(remarkFrontmatter)
+				.use(remarkHtml)
+				.use(() => (_, file) => matter(file))
+				.process(src)
+
+			const frontmatter = parseFrontMatter(file.data.matter, id)
+
+			const separator = '\n<hr>\n'
+			const parts = String(file).split(separator)
+			const description = parts[0]
+			const details = parts.slice(1).join(separator)
+			const path = `/${match[1]}`
+			const codeUrl = `https://github.com/tldraw/tldraw/tree/main/apps/examples/src/examples${path}`
+
+			const result = [
+				`export const title = ${JSON.stringify(frontmatter.title)};`,
+				`export const order = ${JSON.stringify(frontmatter.order)};`,
+				`export const hide = ${JSON.stringify(frontmatter.hide)};`,
+				`export const description = ${JSON.stringify(description)};`,
+				`export const details = ${JSON.stringify(details)};`,
+				`export const codeUrl = ${JSON.stringify(codeUrl)};`,
+				`export const path = ${JSON.stringify(path)};`,
+				`export const componentFile = ${JSON.stringify(frontmatter.component)};`,
+				`import {lazy} from 'react';`,
+				`export const loadComponent = async () => {`,
+				`    return (await import(${JSON.stringify(frontmatter.component)})).default;`,
+				`};`,
+			]
+
+			return result.join('\n')
+		},
+	}
+}
+
+function parseFrontMatter(data: unknown, fileName: string) {
+	if (!data || typeof data !== 'object') {
+		throw new Error(`Frontmatter missing in ${fileName}`)
+	}
+
+	if (!('title' in data && typeof data.title === 'string')) {
+		throw new Error(`Frontmatter key 'title' must be string in ${fileName}`)
+	}
+
+	if (!('component' in data && typeof data.component === 'string')) {
+		throw new Error(`Frontmatter key 'component' must be string in ${fileName}`)
+	}
+
+	const order = 'order' in data ? data.order : null
+	if (order !== null && typeof order !== 'number') {
+		throw new Error(`Frontmatter key 'order' must be number in ${fileName}`)
+	}
+
+	const hide = 'hide' in data ? data.hide : false
+	if (hide !== false && hide !== true) {
+		throw new Error(`Frontmatter key 'hide' must be boolean in ${fileName}`)
+	}
+
+	return {
+		title: data.title,
+		component: data.component,
+		order,
+		hide,
+	}
+}

package.json

@@ -37,7 +37,7 @@
 		"postinstall": "husky install && yarn refresh-assets",
 		"refresh-assets": "lazy refresh-assets",
 		"build": "lazy build",
-		"dev": "lazy run dev --filter='{,bublic/}apps/examples' --filter='{,bublic/}packages/tldraw'",
+		"dev": "LAZYREPO_PRETTY_OUTPUT=0 lazy run dev --filter='{,bublic/}apps/examples' --filter='{,bublic/}packages/tldraw'",
 		"dev-vscode": "code ./apps/vscode/extension && lazy run dev --filter='{,bublic/}apps/vscode/{extension,editor}'",
 		"build-types": "lazy inherit",
 		"build-api": "lazy build-api",