diff --git a/site/lib/jaspr_options.dart b/site/lib/jaspr_options.dart index 20e403928dc..c62ee2d5ec4 100644 --- a/site/lib/jaspr_options.dart +++ b/site/lib/jaspr_options.dart @@ -7,19 +7,21 @@ import 'package:jaspr/jaspr.dart'; import 'package:docs_flutter_dev_site/src/client/global_scripts.dart' as prefix0; -import 'package:docs_flutter_dev_site/src/components/client/on_this_page_button.dart' +import 'package:docs_flutter_dev_site/src/components/client/dartpad_injector.dart' as prefix1; -import 'package:docs_flutter_dev_site/src/components/header/menu_toggle.dart' +import 'package:docs_flutter_dev_site/src/components/client/on_this_page_button.dart' as prefix2; -import 'package:docs_flutter_dev_site/src/components/header/site_switcher.dart' +import 'package:docs_flutter_dev_site/src/components/header/menu_toggle.dart' as prefix3; -import 'package:docs_flutter_dev_site/src/components/header/theme_switcher.dart' +import 'package:docs_flutter_dev_site/src/components/header/site_switcher.dart' as prefix4; -import 'package:docs_flutter_dev_site/src/components/cookie_notice.dart' +import 'package:docs_flutter_dev_site/src/components/header/theme_switcher.dart' as prefix5; -import 'package:docs_flutter_dev_site/src/components/copy_button.dart' +import 'package:docs_flutter_dev_site/src/components/cookie_notice.dart' as prefix6; -import 'package:docs_flutter_dev_site/src/components/feedback.dart' as prefix7; +import 'package:docs_flutter_dev_site/src/components/copy_button.dart' + as prefix7; +import 'package:docs_flutter_dev_site/src/components/feedback.dart' as prefix8; /// Default [JasprOptions] for use with your jaspr project. /// @@ -43,45 +45,56 @@ JasprOptions get defaultJasprOptions => JasprOptions( 'src/client/global_scripts', ), - prefix1.OnThisPageButton: ClientTarget( + prefix1.DartPadInjector: ClientTarget( + 'src/components/client/dartpad_injector', + params: _prefix1DartPadInjector, + ), + + prefix2.OnThisPageButton: ClientTarget( 'src/components/client/on_this_page_button', ), - prefix5.CookieNotice: ClientTarget( + prefix6.CookieNotice: ClientTarget( 'src/components/cookie_notice', ), - prefix6.CopyButton: ClientTarget( + prefix7.CopyButton: ClientTarget( 'src/components/copy_button', - params: _prefix6CopyButton, + params: _prefix7CopyButton, ), - prefix7.FeedbackComponent: ClientTarget( + prefix8.FeedbackComponent: ClientTarget( 'src/components/feedback', - params: _prefix7FeedbackComponent, + params: _prefix8FeedbackComponent, ), - prefix2.MenuToggle: ClientTarget( + prefix3.MenuToggle: ClientTarget( 'src/components/header/menu_toggle', ), - prefix3.SiteSwitcher: ClientTarget( + prefix4.SiteSwitcher: ClientTarget( 'src/components/header/site_switcher', ), - prefix4.ThemeSwitcher: ClientTarget( + prefix5.ThemeSwitcher: ClientTarget( 'src/components/header/theme_switcher', ), }, styles: () => [], ); -Map _prefix6CopyButton(prefix6.CopyButton c) => { +Map _prefix1DartPadInjector(prefix1.DartPadInjector c) => { + 'title': c.title, + 'theme': c.theme, + 'height': c.height, + 'runAutomatically': c.runAutomatically, +}; +Map _prefix7CopyButton(prefix7.CopyButton c) => { 'toCopy': c.toCopy, 'buttonText': c.buttonText, 'classes': c.classes, 'title': c.title, }; -Map _prefix7FeedbackComponent(prefix7.FeedbackComponent c) => { +Map _prefix8FeedbackComponent(prefix8.FeedbackComponent c) => { 'issueUrl': c.issueUrl, }; diff --git a/site/lib/src/components/client/dartpad_injector.dart b/site/lib/src/components/client/dartpad_injector.dart new file mode 100644 index 00000000000..63201b01a86 --- /dev/null +++ b/site/lib/src/components/client/dartpad_injector.dart @@ -0,0 +1,121 @@ +// Copyright 2025 The Flutter Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +import 'package:jaspr/jaspr.dart'; +import '../dartpad/embedded_dartpad.dart'; + +import '../dartpad/extract_content.dart' + if (dart.library.io) '../dartpad/extract_content_vm.dart'; + +/// Prepares a code block that will be replaced with an embedded +/// DartPad when the site is loaded. +final class DartPadWrapper extends StatefulComponent { + DartPadWrapper({ + super.key, + required this.content, + required this.title, + this.theme, + this.height, + this.runAutomatically = false, + }); + + final String content; + final String title; + final String? theme; + final String? height; + final bool runAutomatically; + + @override + State createState() => _DartPadWrapperState(); +} + +final class _DartPadWrapperState extends State { + @override + Component build(BuildContext context) { + return DartPadInjector( + title: component.title, + theme: component.theme, + height: component.height, + runAutomatically: component.runAutomatically, + // We don't pass the content here, so it's not part of the client + // component data. It will be retrieved by DartPadInjector automatically. + ); + } +} + +@client +class DartPadInjector extends StatefulComponent { + const DartPadInjector({ + required this.title, + this.theme, + this.height, + this.runAutomatically = false, + super.key, + }); + + final String title; + final String? theme; + final String? height; + final bool runAutomatically; + + @override + State createState() => _DartPadInjectorState(); +} + +class _DartPadInjectorState extends State { + static int _injectedIndex = 0; + + final String _frameId = () { + final nextId = _injectedIndex; + _injectedIndex += 1; + return 'embedded-dartpad-$nextId'; + }(); + + String content = ''; + + @override + void initState() { + super.initState(); + + if (kIsWeb) { + // During hydration, extract the content from the pre-rendered code block. + content = extractContent(context as Element); + } + } + + @override + Component build(BuildContext context) { + if (!kIsWeb) { + // During pre-rendering, get the content from the nearest DartPadWrapper. + final content = context + .findAncestorStateOfType<_DartPadWrapperState>() + ?.component + .content; + return pre([ + code( + attributes: {'title': component.title}, + [text(content ?? '')], + ), + ]); + } + + return Component.wrapElement( + attributes: { + 'height': ?component.height, + 'title': component.title, + }, + child: EmbeddedDartPad.create( + iframeId: _frameId, + theme: switch (component.theme) { + 'auto' => DartPadTheme.auto, + 'dark' => DartPadTheme.dark, + _ => DartPadTheme.light, + }, + embedLayout: true, + runAutomatically: component.runAutomatically, + code: content, + ), + ); + } +} diff --git a/site/lib/src/components/dartpad/embedded_dartpad.dart b/site/lib/src/components/dartpad/embedded_dartpad.dart new file mode 100644 index 00000000000..9a1bbf26c7a --- /dev/null +++ b/site/lib/src/components/dartpad/embedded_dartpad.dart @@ -0,0 +1,206 @@ +// Copyright 2025 The Flutter Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +import 'package:jaspr/jaspr.dart'; +import 'package:universal_web/js_interop.dart'; +import 'package:universal_web/web.dart' as web; + +/// An iframe-embedded DartPad that can be injected into a web page, +/// then have its source code updated. +final class EmbeddedDartPad extends StatefulComponent { + /// The unique identifier that's used to identify the created DartPad iframe. + /// + /// This ID is used both as the HTML element `id` and + /// as the iframe's `name` attribute for message targeting. + final String iframeId; + + /// The full URL of the DartPad iframe including + /// all path segments and query parameters. + final String _iframeUrl; + + /// The Dart source code to be displayed in the embedded DartPad's editor. + /// + /// The [code] should generally be valid Dart code for + /// the latest stable versions of Dart and Flutter. + final String code; + + /// Creates an embedded DartPad instance with + /// the specified [iframeId] and [iframeUrl]. + EmbeddedDartPad._({ + required this.iframeId, + required String iframeUrl, + required this.code, + }) : _iframeUrl = iframeUrl; + + /// Creates a new embedded DartPad element with the specified configuration. + /// + /// The [iframeId] is used to identify the created DartPad iframe. + /// It must be unique within the document and a valid HTML element ID. + /// + /// The [scheme] and [host] are used to construct the DartPad iframe URL. + /// [scheme] defaults to 'https' and [host] defaults to 'dartpad.dev'. + /// + /// To control the appearance of the embedded DartPad, + /// you can switch to the [embedLayout] and choose a specific [theme]. + /// + /// The [code] is the Dart source code to be injected into the DartPad editor + /// after it has finished loading. + factory EmbeddedDartPad.create({ + required String iframeId, + String? scheme, + String? host, + bool? embedLayout, + bool runAutomatically = false, + DartPadTheme? theme = DartPadTheme.auto, + required String code, + }) { + final dartPadUrl = Uri( + scheme: scheme ?? 'https', + host: host ?? 'dartpad.dev', + queryParameters: { + if (embedLayout ?? true) 'embed': '$embedLayout', + if (theme != DartPadTheme.auto) 'theme': '$theme', + if (runAutomatically) 'run': 'true', + }, + ).toString(); + + return EmbeddedDartPad._( + iframeId: iframeId, + iframeUrl: dartPadUrl, + code: code, + ); + } + + @override + State createState() => _EmbeddedDartPadState(); +} + +class _EmbeddedDartPadState extends State { + final GlobalNodeKey _iframeKey = GlobalNodeKey(); + bool _initialized = false; + + @override + void initState() { + super.initState(); + if (kIsWeb) { + // Start listening for the 'ready' message from the embedded DartPad. + late final JSExportedDartFunction readyHandler; + readyHandler = (web.MessageEvent event) { + if (event.data case _EmbedReadyMessage(type: 'ready', :final sender?)) { + // Verify the message is sent from the corresponding iframe, in case + // there are multiple DartPads being embedded at the same time. + if (sender != component.iframeId) { + return; + } + + web.window.removeEventListener('message', readyHandler); + if (_initialized) return; + _initialized = true; + _updateCode(); + } + }.toJS; + + web.window.addEventListener('message', readyHandler); + } + } + + @override + void didUpdateComponent(covariant EmbeddedDartPad oldComponent) { + super.didUpdateComponent(oldComponent); + + if (oldComponent.iframeId != component.iframeId) { + throw StateError( + 'The iframeId of an EmbeddedDartPad cannot be changed after creation.', + ); + } + if (oldComponent._iframeUrl != component._iframeUrl) { + throw StateError( + 'The iframeUrl of an EmbeddedDartPad cannot be changed after creation.', + ); + } + + if (oldComponent.code != component.code && _initialized) { + _updateCode(); + } + } + + /// Updates the source code displayed in the embedded DartPad's editor + /// with the specified Dart [code]. + void _updateCode() { + assert(_initialized, 'Cannot update code before iframe is initialized.'); + assert(_iframeKey.currentNode != null, 'Iframe element is not available.'); + + _iframeKey.currentNode!.contentWindowCrossOrigin?.postMessage( + _MessageToDartPad.updateSource(component.code), + _anyTargetOrigin, + ); + } + + @override + Component build(BuildContext context) { + return iframe( + key: _iframeKey, + id: component.iframeId, + name: component.iframeId, + src: component._iframeUrl, + loading: MediaLoading.lazy, + allow: 'clipboard-write', + [], + ); + } +} + +/// The themes available for an embedded DartPad instance. +enum DartPadTheme { + /// Light theme with a bright background. + light, + + /// Dark theme with a dark background. + dark, + + /// Theme that relies on DartPad's built-in theme handling. + auto, +} + +/// The target origin to be used for cross-frame messages sent to +/// the DartPad iframe's content window. +/// +/// Uses '*' to enable communication with DartPad instances +/// regardless of their actual origin. +final JSString _anyTargetOrigin = '*'.toJS; + +/// Represents a ready message received from the DartPad iframe. +/// +/// Sent by DartPad when it has finished loading and is ready to +/// receive code updates by sending it a cross-frame message. +extension type _EmbedReadyMessage._(JSObject _) { + /// The message type, which should be 'ready' for initialization messages. + external String? get type; + + /// The sender ID to identify which DartPad instance sent the message. + external String? get sender; +} + +/// Represents DartPad's expected format for receiving cross-frame messages +/// from its parent window, usually the [EmbeddedDartPad] host. +@anonymous +extension type _MessageToDartPad._(JSObject _) implements JSObject { + /// Creates a JavaScript object with the expected structure for + /// updating the source code in an embedded DartPad's editor. + external factory _MessageToDartPad._updateSource({ + required String sourceCode, + String type, + }); + + /// Creates a message to update that can be sent to + /// update the source code in an embedded DartPad instance. + /// + /// The [sourceCode] should generally be valid Dart code for + /// the latest stable versions of Dart and Flutter. + factory _MessageToDartPad.updateSource(String sourceCode) => + _MessageToDartPad._updateSource( + sourceCode: sourceCode, + type: 'sourceCode', + ); +} diff --git a/site/lib/src/components/dartpad/extract_content.dart b/site/lib/src/components/dartpad/extract_content.dart new file mode 100644 index 00000000000..433eab54e30 --- /dev/null +++ b/site/lib/src/components/dartpad/extract_content.dart @@ -0,0 +1,25 @@ +// Copyright 2025 The Flutter Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +import 'dart:js_interop'; + +import 'package:jaspr/browser.dart'; +import 'package:universal_web/web.dart' as web; + +/// Extracts the content of a 
 block inside the given
+/// [element] during hydration.
+String extractContent(Element element) {
+  final r = element.parentRenderObjectElement?.renderObject as DomRenderObject?;
+  if (r == null) return '';
+
+  final code = r.retakeNode((node) {
+    return node.instanceOfString('Element') &&
+        (node as web.Element).tagName.toLowerCase() == 'pre';
+  });
+
+  if (code == null) return '';
+
+  code.parentNode?.removeChild(code);
+  return (code as web.Element).textContent ?? '';
+}
diff --git a/site/lib/src/components/dartpad/extract_content_vm.dart b/site/lib/src/components/dartpad/extract_content_vm.dart
new file mode 100644
index 00000000000..80b59939c22
--- /dev/null
+++ b/site/lib/src/components/dartpad/extract_content_vm.dart
@@ -0,0 +1,8 @@
+// Copyright 2025 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:jaspr/jaspr.dart';
+
+// Stub for non-web platforms.
+String extractContent(BuildContext context) => '';
diff --git a/site/lib/src/components/dartpad_injector.dart b/site/lib/src/components/dartpad_injector.dart
deleted file mode 100644
index ed85380f100..00000000000
--- a/site/lib/src/components/dartpad_injector.dart
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2025 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:jaspr/jaspr.dart';
-
-/// Prepares an element with the structure expected by
-/// the `inject_dartpad` tool from site-shared.
-final class DartPadInjector extends StatelessComponent {
-  const DartPadInjector({
-    super.key,
-    required this.content,
-    String? theme,
-    String? title,
-    this.height,
-    bool? runAutomatically,
-  }) : theme = theme ?? 'light',
-       title = title ?? 'Runnable Dart sample',
-       runAutomatically = runAutomatically ?? false;
-
-  final List content;
-  final String theme;
-  final String title;
-  final String? height;
-  final bool runAutomatically;
-
-  @override
-  Component build(BuildContext context) => pre([
-    code(
-      attributes: {
-        'title': title,
-        'data-dartpad': 'true',
-        'data-embed': 'true',
-        'data-theme': theme,
-        'data-run': runAutomatically.toString(),
-        'data-height': ?height,
-      },
-      [
-        text(content.join('\n')),
-      ],
-    ),
-  ]);
-}
diff --git a/site/lib/src/extensions/code_block_processor.dart b/site/lib/src/extensions/code_block_processor.dart
index 0d633e95250..dd76e2cb74c 100644
--- a/site/lib/src/extensions/code_block_processor.dart
+++ b/site/lib/src/extensions/code_block_processor.dart
@@ -10,7 +10,7 @@ import 'package:jaspr_content/jaspr_content.dart';
 import 'package:meta/meta.dart';
 import 'package:opal/opal.dart' as opal;
 
-import '../components/dartpad_injector.dart';
+import '../components/client/dartpad_injector.dart';
 import '../components/wrapped_code_block.dart';
 import '../highlight/theme/dark.dart';
 import '../highlight/theme/light.dart';
@@ -65,9 +65,9 @@ final class CodeBlockProcessor implements PageExtension {
 
           if (language == 'dartpad') {
             return ComponentNode(
-              DartPadInjector(
-                content: lines,
-                title: title,
+              DartPadWrapper(
+                content: lines.join('\n'),
+                title: title ?? 'Runnable Flutter example',
                 theme: metadata['theme'],
                 height: metadata['height'],
                 runAutomatically: metadata['run'] == 'true',
diff --git a/site/web/assets/js/inject_dartpad.dart.js b/site/web/assets/js/inject_dartpad.dart.js
deleted file mode 100644
index 4a41e2a0896..00000000000
--- a/site/web/assets/js/inject_dartpad.dart.js
+++ /dev/null
@@ -1,2723 +0,0 @@
-(function dartProgram(){function copyProperties(a,b){var s=Object.keys(a)
-for(var r=0;r=0)return true
-if(typeof version=="function"&&version.length==0){var q=version()
-if(/^\d+\.\d+\.\d+\.\d+$/.test(q))return true}}catch(p){}return false}()
-function inherit(a,b){a.prototype.constructor=a
-a.prototype["$i"+a.name]=a
-if(b!=null){if(z){Object.setPrototypeOf(a.prototype,b.prototype)
-return}var s=Object.create(b.prototype)
-copyProperties(a.prototype,s)
-a.prototype=s}}function inheritMany(a,b){for(var s=0;s0;b=s){s=b-1
-r=a.charCodeAt(s)
-if(r!==32&&r!==13&&!J.Ga(r))break}return b},
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-oo(a){var s,r=a^48
-if(r<=9)return r
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-s=m[3]
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-if(m[2]!=null)return parseInt(a,16)
-return n}if(b<2||b>36)throw A.L(A.TE(b,2,36,"radix",n))
-if(b===10&&s!=null)return parseInt(a,10)
-if(b<10||s==null){r=b<=10?47+b:86+b
-q=m[1]
-for(p=q.length,o=0;or)return n}return parseInt(a,b)},
-l(a){var s,r,q,p
-if(a instanceof A.a)return A.d(A.z(a),null)
-s=J.c(a)
-if(s===B.Ok||s===B.Ub||t.o.b(a)){r=B.O4(a)
-if(r!=="Object"&&r!=="")return r
-q=a.constructor
-if(typeof q=="function"){p=q.name
-if(typeof p=="string"&&p!=="Object"&&p!=="")return p}}return A.d(A.z(a),null)},
-i(a){var s,r,q
-if(a==null||typeof a=="number"||A.y(a))return J.n(a)
-if(typeof a=="string")return JSON.stringify(a)
-if(a instanceof A.t)return a["["](0)
-if(a instanceof A.M)return a.k(!0)
-s=$.u()
-for(r=0;r<1;++r){q=s[r].R(a)
-if(q!=null)return q}return"Instance of '"+A.l(a)+"'"},
-fw(a,b,c){var s,r,q,p
-if(c<=500&&b===0&&c===a.length)return String.fromCharCode.apply(null,a)
-for(s=b,r="";s>>0,s&1023|56320)}}throw A.L(A.TE(a,0,1114111,null,null))},
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diff --git a/src/content/app-architecture/design-patterns/key-value-data.md b/src/content/app-architecture/design-patterns/key-value-data.md
index 6c62378dde1..c800bd8946c 100644
--- a/src/content/app-architecture/design-patterns/key-value-data.md
+++ b/src/content/app-architecture/design-patterns/key-value-data.md
@@ -7,9 +7,6 @@ contentTags:
   - dark mode
 iconPath: /assets/images/docs/app-architecture/design-patterns/kv-store-icon.svg
 order: 1
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/app-architecture/design-patterns/offline-first.md b/src/content/app-architecture/design-patterns/offline-first.md
index 1e6e764035d..ec09111a78e 100644
--- a/src/content/app-architecture/design-patterns/offline-first.md
+++ b/src/content/app-architecture/design-patterns/offline-first.md
@@ -7,9 +7,6 @@ contentTags:
   - repository pattern
 iconPath: /assets/images/docs/app-architecture/design-patterns/offline-first-icon.svg
 order: 3
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/app-architecture/design-patterns/optimistic-state.md b/src/content/app-architecture/design-patterns/optimistic-state.md
index 5e9d20d5873..852846c3302 100644
--- a/src/content/app-architecture/design-patterns/optimistic-state.md
+++ b/src/content/app-architecture/design-patterns/optimistic-state.md
@@ -6,9 +6,6 @@ contentTags:
   - asynchronous dart
 iconPath: /assets/images/docs/app-architecture/design-patterns/optimistic-state-icon.svg
 order: 0
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/app-architecture/design-patterns/result.md b/src/content/app-architecture/design-patterns/result.md
index 3960dc7447b..1d739965781 100644
--- a/src/content/app-architecture/design-patterns/result.md
+++ b/src/content/app-architecture/design-patterns/result.md
@@ -6,9 +6,6 @@ contentTags:
   - services
 iconPath: /assets/images/docs/app-architecture/design-patterns/result-icon.svg
 order: 5
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/app-architecture/design-patterns/sql.md b/src/content/app-architecture/design-patterns/sql.md
index 86b97b0e2b5..daac2603361 100644
--- a/src/content/app-architecture/design-patterns/sql.md
+++ b/src/content/app-architecture/design-patterns/sql.md
@@ -6,9 +6,6 @@ contentTags:
   - SQL
 iconPath: /assets/images/docs/app-architecture/design-patterns/sql-icon.svg
 order: 2
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/codelabs/implicit-animations.md b/src/content/codelabs/implicit-animations.md
index 5067425c084..f83f5ef66d5 100644
--- a/src/content/codelabs/implicit-animations.md
+++ b/src/content/codelabs/implicit-animations.md
@@ -3,9 +3,6 @@ title: "Implicit animations"
 description: >
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   through interactive examples and exercises.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/animation/animated-container.md b/src/content/cookbook/animation/animated-container.md
index 40a6946406f..885943b7e59 100644
--- a/src/content/cookbook/animation/animated-container.md
+++ b/src/content/cookbook/animation/animated-container.md
@@ -1,9 +1,6 @@
 ---
 title: Animate the properties of a container
 description: How to animate properties of a container using implicit animations.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/animation/opacity-animation.md b/src/content/cookbook/animation/opacity-animation.md
index e4bf9af1133..55087cb42fb 100644
--- a/src/content/cookbook/animation/opacity-animation.md
+++ b/src/content/cookbook/animation/opacity-animation.md
@@ -1,9 +1,6 @@
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 title: Fade a widget in and out
 description: How to fade a widget in and out.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/animation/page-route-animation.md b/src/content/cookbook/animation/page-route-animation.md
index 0f91c035e19..3b4306152d3 100644
--- a/src/content/cookbook/animation/page-route-animation.md
+++ b/src/content/cookbook/animation/page-route-animation.md
@@ -1,9 +1,6 @@
 ---
 title: Animate a page route transition
 description: How to animate from one page to another.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/animation/physics-simulation.md b/src/content/cookbook/animation/physics-simulation.md
index a3207467484..7b4dee6fd3a 100644
--- a/src/content/cookbook/animation/physics-simulation.md
+++ b/src/content/cookbook/animation/physics-simulation.md
@@ -1,9 +1,6 @@
 ---
 title: Animate a widget using a physics simulation
 description: How to implement a physics animation.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/design/drawer.md b/src/content/cookbook/design/drawer.md
index fa3d6a82f86..aa04f2d8b37 100644
--- a/src/content/cookbook/design/drawer.md
+++ b/src/content/cookbook/design/drawer.md
@@ -1,9 +1,6 @@
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-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/design/orientation.md b/src/content/cookbook/design/orientation.md
index 428cd08ca1d..ce4f5c28345 100644
--- a/src/content/cookbook/design/orientation.md
+++ b/src/content/cookbook/design/orientation.md
@@ -1,9 +1,6 @@
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-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
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diff --git a/src/content/cookbook/design/snackbars.md b/src/content/cookbook/design/snackbars.md
index ff966748cab..685e2a075ab 100644
--- a/src/content/cookbook/design/snackbars.md
+++ b/src/content/cookbook/design/snackbars.md
@@ -1,9 +1,6 @@
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-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/design/tabs.md b/src/content/cookbook/design/tabs.md
index f7fe3b9d1aa..095ef836a6e 100644
--- a/src/content/cookbook/design/tabs.md
+++ b/src/content/cookbook/design/tabs.md
@@ -1,9 +1,6 @@
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-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/design/themes.md b/src/content/cookbook/design/themes.md
index 9b1c0f2133a..bfa1e79701a 100644
--- a/src/content/cookbook/design/themes.md
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diff --git a/src/content/cookbook/effects/download-button.md b/src/content/cookbook/effects/download-button.md
index f94e50c30ba..12d406528b0 100644
--- a/src/content/cookbook/effects/download-button.md
+++ b/src/content/cookbook/effects/download-button.md
@@ -1,9 +1,6 @@
 ---
 title: Create a download button
 description: How to implement a download button.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/effects/drag-a-widget.md b/src/content/cookbook/effects/drag-a-widget.md
index 38794ceef54..0a285268688 100644
--- a/src/content/cookbook/effects/drag-a-widget.md
+++ b/src/content/cookbook/effects/drag-a-widget.md
@@ -1,9 +1,6 @@
 ---
 title: Drag a UI element
 description: How to implement a draggable UI element.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/effects/expandable-fab.md b/src/content/cookbook/effects/expandable-fab.md
index 5e98d565530..056a4e03e23 100644
--- a/src/content/cookbook/effects/expandable-fab.md
+++ b/src/content/cookbook/effects/expandable-fab.md
@@ -1,9 +1,6 @@
 ---
 title: Create an expandable FAB
 description: How to implement a FAB that expands to multiple buttons when tapped.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/effects/nested-nav.md b/src/content/cookbook/effects/nested-nav.md
index f1ae4abb495..d9599c09239 100644
--- a/src/content/cookbook/effects/nested-nav.md
+++ b/src/content/cookbook/effects/nested-nav.md
@@ -1,9 +1,6 @@
 ---
 title: Create a nested navigation flow
 description: How to implement a flow with nested navigation.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/effects/parallax-scrolling.md b/src/content/cookbook/effects/parallax-scrolling.md
index 7f1097804d8..8a17ccda1cc 100644
--- a/src/content/cookbook/effects/parallax-scrolling.md
+++ b/src/content/cookbook/effects/parallax-scrolling.md
@@ -1,9 +1,6 @@
 ---
 title: Create a scrolling parallax effect
 description: How to implement a scrolling parallax effect.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/effects/shimmer-loading.md b/src/content/cookbook/effects/shimmer-loading.md
index b36f18bb172..437aa4beb62 100644
--- a/src/content/cookbook/effects/shimmer-loading.md
+++ b/src/content/cookbook/effects/shimmer-loading.md
@@ -1,9 +1,6 @@
 ---
 title: Create a shimmer loading effect
 description: How to implement a shimmer loading effect.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/effects/staggered-menu-animation.md b/src/content/cookbook/effects/staggered-menu-animation.md
index c3c04461045..53811dd236d 100644
--- a/src/content/cookbook/effects/staggered-menu-animation.md
+++ b/src/content/cookbook/effects/staggered-menu-animation.md
@@ -1,9 +1,6 @@
 ---
 title: Create a staggered menu animation
 description: How to implement a staggered menu animation.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/effects/typing-indicator.md b/src/content/cookbook/effects/typing-indicator.md
index 0eff0ce19d0..99c5172c23a 100644
--- a/src/content/cookbook/effects/typing-indicator.md
+++ b/src/content/cookbook/effects/typing-indicator.md
@@ -1,9 +1,6 @@
 ---
 title: Create a typing indicator
 description: How to implement a typing indicator.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/forms/focus.md b/src/content/cookbook/forms/focus.md
index d9fd2c331bb..6ae62f4fb38 100644
--- a/src/content/cookbook/forms/focus.md
+++ b/src/content/cookbook/forms/focus.md
@@ -1,9 +1,6 @@
 ---
 title: Focus and text fields
 description: How focus works with text fields.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/forms/retrieve-input.md b/src/content/cookbook/forms/retrieve-input.md
index 25b685f75da..8316a35267f 100644
--- a/src/content/cookbook/forms/retrieve-input.md
+++ b/src/content/cookbook/forms/retrieve-input.md
@@ -1,9 +1,6 @@
 ---
 title: Retrieve the value of a text field
 description: How to retrieve text from a text field.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/forms/text-field-changes.md b/src/content/cookbook/forms/text-field-changes.md
index 166bf0fe826..7a0abdf2fbf 100644
--- a/src/content/cookbook/forms/text-field-changes.md
+++ b/src/content/cookbook/forms/text-field-changes.md
@@ -1,9 +1,6 @@
 ---
 title: Handle changes to a text field
 description: How to detect changes to a text field.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/forms/text-input.md b/src/content/cookbook/forms/text-input.md
index fe6516bfbff..77056ee514a 100644
--- a/src/content/cookbook/forms/text-input.md
+++ b/src/content/cookbook/forms/text-input.md
@@ -1,9 +1,6 @@
 ---
 title: Create and style a text field
 description: How to implement a text field.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/forms/validation.md b/src/content/cookbook/forms/validation.md
index 44dd8dc3ff3..78c2c87b441 100644
--- a/src/content/cookbook/forms/validation.md
+++ b/src/content/cookbook/forms/validation.md
@@ -1,9 +1,6 @@
 ---
 title: Build a form with validation
 description: How to build a form that validates input.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/gestures/dismissible.md b/src/content/cookbook/gestures/dismissible.md
index 3ef0b7f88b4..dba7034d15b 100644
--- a/src/content/cookbook/gestures/dismissible.md
+++ b/src/content/cookbook/gestures/dismissible.md
@@ -1,9 +1,6 @@
 ---
 title: Implement swipe to dismiss
 description: How to implement swiping to dismiss or delete.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/gestures/handling-taps.md b/src/content/cookbook/gestures/handling-taps.md
index dd57563f1b5..1ad9f6d45ca 100644
--- a/src/content/cookbook/gestures/handling-taps.md
+++ b/src/content/cookbook/gestures/handling-taps.md
@@ -1,9 +1,6 @@
 ---
 title: Handle taps
 description: How to handle tapping and dragging.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/gestures/ripples.md b/src/content/cookbook/gestures/ripples.md
index f9a4bd063d4..092ff89179f 100644
--- a/src/content/cookbook/gestures/ripples.md
+++ b/src/content/cookbook/gestures/ripples.md
@@ -1,9 +1,6 @@
 ---
 title: Add Material touch ripples
 description: How to implement ripple animations.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/images/network-image.md b/src/content/cookbook/images/network-image.md
index f4343250436..b3651fea007 100644
--- a/src/content/cookbook/images/network-image.md
+++ b/src/content/cookbook/images/network-image.md
@@ -1,9 +1,6 @@
 ---
 title: Display images from the internet
 description: How to display images from the internet.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/lists/basic-list.md b/src/content/cookbook/lists/basic-list.md
index a2f1d8a539f..5c2877cbbbf 100644
--- a/src/content/cookbook/lists/basic-list.md
+++ b/src/content/cookbook/lists/basic-list.md
@@ -1,9 +1,6 @@
 ---
 title: Use lists
 description: How to implement a list.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/lists/floating-app-bar.md b/src/content/cookbook/lists/floating-app-bar.md
index fbf63d79d3f..2894f7d8111 100644
--- a/src/content/cookbook/lists/floating-app-bar.md
+++ b/src/content/cookbook/lists/floating-app-bar.md
@@ -1,9 +1,6 @@
 ---
 title: Place a floating app bar above a list
 description: How to place a floating app bar or navigation bar above a list.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/lists/grid-lists.md b/src/content/cookbook/lists/grid-lists.md
index 2099ad136de..d8cf8acf3df 100644
--- a/src/content/cookbook/lists/grid-lists.md
+++ b/src/content/cookbook/lists/grid-lists.md
@@ -1,9 +1,6 @@
 ---
 title: Create a grid list
 description: How to implement a grid list.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/lists/horizontal-list.md b/src/content/cookbook/lists/horizontal-list.md
index 1eaf3e6e701..2991ed39b57 100644
--- a/src/content/cookbook/lists/horizontal-list.md
+++ b/src/content/cookbook/lists/horizontal-list.md
@@ -1,9 +1,6 @@
 ---
 title: Create a horizontal list
 description: How to implement a horizontal list.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/lists/long-lists.md b/src/content/cookbook/lists/long-lists.md
index 8adebd36b4a..116e00ec3d2 100644
--- a/src/content/cookbook/lists/long-lists.md
+++ b/src/content/cookbook/lists/long-lists.md
@@ -1,9 +1,6 @@
 ---
 title: Work with long lists
 description: Use ListView.builder to implement a long or infinite list.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/lists/mixed-list.md b/src/content/cookbook/lists/mixed-list.md
index 08fea646c51..c3247031c7d 100644
--- a/src/content/cookbook/lists/mixed-list.md
+++ b/src/content/cookbook/lists/mixed-list.md
@@ -1,9 +1,6 @@
 ---
 title: Create lists with different types of items
 description: How to implement a list that contains different types of assets.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/lists/spaced-items.md b/src/content/cookbook/lists/spaced-items.md
index b483936291a..a7f27c06095 100644
--- a/src/content/cookbook/lists/spaced-items.md
+++ b/src/content/cookbook/lists/spaced-items.md
@@ -1,9 +1,6 @@
 ---
 title: List with spaced items
 description: How to create a list with spaced or expanded items 
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/navigation/hero-animations.md b/src/content/cookbook/navigation/hero-animations.md
index 03c754e6ce1..1837074e5ec 100644
--- a/src/content/cookbook/navigation/hero-animations.md
+++ b/src/content/cookbook/navigation/hero-animations.md
@@ -1,9 +1,6 @@
 ---
 title: Animate a widget across screens
 description: How to animate a widget from one screen to another
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/navigation/named-routes.md b/src/content/cookbook/navigation/named-routes.md
index 6f96251bf81..f5db4568d61 100644
--- a/src/content/cookbook/navigation/named-routes.md
+++ b/src/content/cookbook/navigation/named-routes.md
@@ -1,9 +1,6 @@
 ---
 title: Navigate with named routes
 description: How to implement named routes for navigating between screens.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/navigation/navigate-with-arguments.md b/src/content/cookbook/navigation/navigate-with-arguments.md
index 6bb60ab6104..ef0628a3a79 100644
--- a/src/content/cookbook/navigation/navigate-with-arguments.md
+++ b/src/content/cookbook/navigation/navigate-with-arguments.md
@@ -1,9 +1,6 @@
 ---
 title: Pass arguments to a named route
 description: How to pass arguments to a named route.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/navigation/navigation-basics.md b/src/content/cookbook/navigation/navigation-basics.md
index 46b565ee7bc..5f19848aa4c 100644
--- a/src/content/cookbook/navigation/navigation-basics.md
+++ b/src/content/cookbook/navigation/navigation-basics.md
@@ -1,9 +1,6 @@
 ---
 title: Navigate to a new screen and back
 description: How to navigate between routes.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/navigation/passing-data.md b/src/content/cookbook/navigation/passing-data.md
index 3126e30d3ef..50322e1eaa8 100644
--- a/src/content/cookbook/navigation/passing-data.md
+++ b/src/content/cookbook/navigation/passing-data.md
@@ -1,9 +1,6 @@
 ---
 title: Send data to a new screen
 description: How to pass data to a new route.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/navigation/returning-data.md b/src/content/cookbook/navigation/returning-data.md
index ade34a13373..3f49468a9df 100644
--- a/src/content/cookbook/navigation/returning-data.md
+++ b/src/content/cookbook/navigation/returning-data.md
@@ -1,9 +1,6 @@
 ---
 title: Return data from a screen
 description: How to return data from a new screen.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/cookbook/plugins/play-video.md b/src/content/cookbook/plugins/play-video.md
index 75c59b29b25..cc6d6f3792e 100644
--- a/src/content/cookbook/plugins/play-video.md
+++ b/src/content/cookbook/plugins/play-video.md
@@ -1,9 +1,6 @@
 ---
 title: Play and pause a video
 description: How to use the video_player plugin.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/ui/index.md b/src/content/ui/index.md
index 5a9dd546965..96c02bb91c5 100644
--- a/src/content/ui/index.md
+++ b/src/content/ui/index.md
@@ -2,9 +2,6 @@
 title: Building user interfaces with Flutter
 shortTitle: UI
 description: Introduction to user interface development in Flutter.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 
diff --git a/src/content/ui/interactivity/actions-and-shortcuts.md b/src/content/ui/interactivity/actions-and-shortcuts.md
index 262a9195fad..790ed9d75fa 100644
--- a/src/content/ui/interactivity/actions-and-shortcuts.md
+++ b/src/content/ui/interactivity/actions-and-shortcuts.md
@@ -1,9 +1,6 @@
 ---
 title: Using Actions and Shortcuts
 description: How to use Actions and Shortcuts in your Flutter app.
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---
 
 This page describes how to bind physical keyboard events to actions in the user
diff --git a/src/content/ui/layout/constraints.md b/src/content/ui/layout/constraints.md
index c066bb2c92e..d0bddae50ce 100644
--- a/src/content/ui/layout/constraints.md
+++ b/src/content/ui/layout/constraints.md
@@ -2,9 +2,6 @@
 title: Understanding constraints
 description: Flutter's model for widget constraints, sizing, positioning, and how they interact.
 showToc: false
-js:
-  - defer: true
-    url: /assets/js/inject_dartpad.dart.js
 ---