Fix cookbook scraper bugs and re-run (#697)

* fix path separator bug in cookbook scraper

* update lockfiles

* add category to image name to avoid conflicts

e.g.
testing/integration/introduction
testing/widget/introduction

* fix form_app symlink

* remove webimages directory

* remove vision_challenge

vision_challenge doesn't build on the dev channel

* update pubspec.yaml in _tool and form_app

animations/pubspec.lock

@@ -7,56 +7,56 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.1"
+    version: "2.5.0-nullsafety.3"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.2"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -73,21 +73,21 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.1"
+    version: "0.12.10-nullsafety.3"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.1"
+    version: "1.8.0-nullsafety.3"
   pedantic:
     dependency: "direct dev"
     description:
@@ -106,55 +106,55 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.2"
+    version: "1.8.0-nullsafety.4"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.1"
+    version: "1.10.0-nullsafety.6"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.2"
+    version: "0.2.19-nullsafety.6"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0 <2.11.0"
+  dart: ">=2.12.0-0.0 <3.0.0"

experimental/web_dashboard/pubspec.lock

@@ -14,7 +14,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.41.1"
+    version: "0.41.2"
   args:
     dependency: transitive
     description:
@@ -42,7 +42,7 @@ packages:
       name: build
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.2"
   build_config:
     dependency: transitive
     description:
@@ -56,28 +56,28 @@ packages:
       name: build_daemon
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.4"
+    version: "2.1.7"
   build_resolvers:
     dependency: transitive
     description:
       name: build_resolvers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.1"
+    version: "1.5.3"
   build_runner:
     dependency: "direct dev"
     description:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.11"
+    version: "1.11.1"
   build_runner_core:
     dependency: transitive
     description:
       name: build_runner_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.5"
+    version: "6.1.7"
   built_collection:
     dependency: transitive
     description:
@@ -168,7 +168,7 @@ packages:
       name: code_builder
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.5.0"
+    version: "3.6.0"
   collection:
     dependency: transitive
     description:
@@ -189,7 +189,7 @@ packages:
       name: coverage
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.14.2"
+    version: "0.15.1"
   crypto:
     dependency: transitive
     description:
@@ -210,7 +210,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.10"
+    version: "1.3.11"
   fake_async:
     dependency: transitive
     description:
@@ -309,7 +309,7 @@ packages:
       name: google_sign_in
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.5.6"
+    version: "4.5.9"
   google_sign_in_platform_interface:
     dependency: transitive
     description:
@@ -449,7 +449,7 @@ packages:
       name: node_preamble
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.12"
+    version: "1.4.13"
   package_config:
     dependency: transitive
     description:
@@ -491,7 +491,7 @@ packages:
       name: provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.3.2+3"
+    version: "4.3.3"
   pub_semver:
     dependency: transitive
     description:
@@ -526,21 +526,21 @@ packages:
       name: shelf_packages_handler
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   shelf_static:
     dependency: transitive
     description:
       name: shelf_static
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.9+1"
+    version: "0.2.9+2"
   shelf_web_socket:
     dependency: transitive
     description:
       name: shelf_web_socket
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.3"
+    version: "0.2.4"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -615,7 +615,7 @@ packages:
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.16.0-nullsafety.13"
+    version: "1.16.0-nullsafety.17"
   test_api:
     dependency: transitive
     description:
@@ -629,7 +629,7 @@ packages:
       name: test_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.12-nullsafety.12"
+    version: "0.3.12-nullsafety.15"
   timing:
     dependency: transitive
     description:
@@ -678,7 +678,7 @@ packages:
       name: web_socket_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   webkit_inspection_protocol:
     dependency: transitive
     description:
@@ -695,4 +695,4 @@ packages:
     version: "2.2.1"
 sdks:
   dart: ">=2.12.0-0.0 <3.0.0"
-  flutter: ">=1.16.0 <2.0.0"
+  flutter: ">=1.16.0"

form_app/pubspec.lock

@@ -28,14 +28,14 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.1"
+    version: "2.5.0-nullsafety.3"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   build:
     dependency: transitive
     description:
@@ -98,14 +98,14 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   checked_yaml:
     dependency: transitive
     description:
@@ -126,7 +126,7 @@ packages:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   code_builder:
     dependency: transitive
     description:
@@ -140,7 +140,7 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   convert:
     dependency: transitive
     description:
@@ -182,7 +182,7 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   file:
     dependency: transitive
     description:
@@ -290,14 +290,14 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.1"
+    version: "0.12.10-nullsafety.3"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   mime:
     dependency: transitive
     description:
@@ -339,7 +339,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.1"
+    version: "1.8.0-nullsafety.3"
   pedantic:
     dependency: transitive
     description:
@@ -407,21 +407,21 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.2"
+    version: "1.8.0-nullsafety.4"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.1"
+    version: "1.10.0-nullsafety.6"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   stream_transform:
     dependency: transitive
     description:
@@ -435,21 +435,21 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.2"
+    version: "0.2.19-nullsafety.6"
   timing:
     dependency: transitive
     description:
@@ -463,14 +463,14 @@ packages:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
   watcher:
     dependency: transitive
     description:
@@ -493,4 +493,4 @@ packages:
     source: hosted
     version: "2.2.1"
 sdks:
-  dart: ">=2.10.0 <2.11.0"
+  dart: ">=2.12.0-0.0 <3.0.0"

place_tracker/pubspec.lock

@@ -7,42 +7,42 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.1"
+    version: "2.5.0-nullsafety.3"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   convert:
     dependency: transitive
     description:
@@ -70,14 +70,14 @@ packages:
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.2"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -113,21 +113,21 @@ packages:
       name: google_maps_flutter
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.6"
+    version: "1.1.1"
   google_maps_flutter_platform_interface:
     dependency: transitive
     description:
       name: google_maps_flutter_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0"
   google_maps_flutter_web:
     dependency: "direct main"
     description:
       name: google_maps_flutter_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.0+8"
+    version: "0.1.1"
   html:
     dependency: transitive
     description:
@@ -135,6 +135,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.14.0+4"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.3-nullsafety.3"
   js_wrapping:
     dependency: transitive
     description:
@@ -148,14 +155,14 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.1"
+    version: "0.12.10-nullsafety.3"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   nested:
     dependency: transitive
     description:
@@ -169,7 +176,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.1"
+    version: "1.8.0-nullsafety.3"
   pedantic:
     dependency: "direct dev"
     description:
@@ -190,7 +197,7 @@ packages:
       name: provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.3.2+3"
+    version: "4.3.3"
   sanitize_html:
     dependency: transitive
     description:
@@ -209,21 +216,21 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.2"
+    version: "1.8.0-nullsafety.4"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.1"
+    version: "1.10.0-nullsafety.6"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   stream_transform:
     dependency: transitive
     description:
@@ -237,28 +244,28 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.2"
+    version: "0.2.19-nullsafety.6"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   uuid:
     dependency: "direct main"
     description:
@@ -272,7 +279,7 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0 <2.11.0"
+  dart: ">=2.12.0-0.0 <3.0.0"
-  flutter: ">=1.22.0 <2.0.0"
+  flutter: ">=1.22.0"

provider_shopper/pubspec.lock

@@ -7,49 +7,49 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.1"
+    version: "2.5.0-nullsafety.3"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -66,14 +66,14 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.1"
+    version: "0.12.10-nullsafety.3"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   nested:
     dependency: transitive
     description:
@@ -87,7 +87,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.1"
+    version: "1.8.0-nullsafety.3"
   pedantic:
     dependency: "direct dev"
     description:
@@ -101,7 +101,7 @@ packages:
       name: provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.3.2+3"
+    version: "4.3.3"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -113,56 +113,56 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.2"
+    version: "1.8.0-nullsafety.4"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.1"
+    version: "1.10.0-nullsafety.6"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.3"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.1"
+    version: "1.1.0-nullsafety.3"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.1"
+    version: "1.2.0-nullsafety.3"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.2"
+    version: "0.2.19-nullsafety.6"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0-110 <2.11.0"
+  dart: ">=2.12.0-0.0 <3.0.0"
   flutter: ">=1.16.0"

web/_tool/pubspec.lock

@@ -14,27 +14,27 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.2.0-nullsafety.3"
   markdown:
     dependency: "direct main"
     description:
       name: markdown
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.8"
+    version: "4.0.0-nullsafety.0"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.4"
+    version: "1.3.0-nullsafety.6"
   path:
     dependency: "direct main"
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0-nullsafety.3"
 sdks:
-  dart: ">=2.6.0 <3.0.0"
+  dart: ">=2.12.0-0 <3.0.0"

web/_tool/pubspec.yaml

@@ -1,6 +1,9 @@
 name: tool
 publish_to: none
 
+environment:                                                            
+  sdk: '>=2.10.0 <3.0.0'
+
 dependencies:
-  markdown: ^2.0.3
+  markdown: ^4.0.0-nullsafety.0
-  path: ^1.6.2
+  path: ^1.8.0-nullsafety.3

web/charts/pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   charts_common:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -54,7 +54,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   path:
     dependency: transitive
     description:
@@ -73,13 +73,13 @@ packages:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0 <2.11.0"
+  dart: ">=2.12.0-0 <3.0.0"

web/filipino_cuisine/pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   charcode:
     dependency: transitive
     description:
@@ -21,7 +21,7 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -61,7 +61,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   path:
     dependency: transitive
     description:
@@ -115,14 +115,14 @@ packages:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0-110 <2.11.0"
+  dart: ">=2.12.0-0 <3.0.0"
-  flutter: ">=0.1.4 <3.0.0"
+  flutter: ">=0.1.4"

web/form_app

@@ -1 +1 @@
-../experimental/form_app
+../form_app

web/github_dataviz/pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   charcode:
     dependency: transitive
     description:
@@ -21,7 +21,7 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -54,7 +54,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   path:
     dependency: transitive
     description:
@@ -101,13 +101,13 @@ packages:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0-110 <2.11.0"
+  dart: ">=2.12.0-0 <3.0.0"

web/particle_background/pubspec.lock

@@ -7,14 +7,14 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0-nullsafety.5"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.3"
+    version: "1.15.0-nullsafety.5"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -26,7 +26,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.6"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -38,13 +38,13 @@ packages:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.5"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0-nullsafety.5"
 sdks:
-  dart: ">=2.10.0-110 <2.11.0"
+  dart: ">=2.12.0-0 <3.0.0"

web/peanut.yaml

@@ -9,7 +9,6 @@ directories:
 - particle_background/web
 - slide_puzzle/web
 - timeflow/web
-- vision_challenge/web
 - form_app/web
 - web_dashboard/web
 - place_tracker/web

web/samples_index/lib/cookbook.dart

@@ -55,7 +55,7 @@ class CookbookScraper {
 
   Future takeScreenshot(String url) async {
     var screenshot = await _driver.captureScreenshotAsList();
-    var file = File('web${screenshotPath(url)}');
+    var file = File('web/${screenshotPath(url)}');
     await file.create(recursive: true);
     await file.writeAsBytes(screenshot);
   }
@@ -72,5 +72,9 @@ String screenshotPath(String url) {
 String parseFileName(String link) {
   var p = path.basename(link);
   var dot = p.indexOf('.');
-  return p.substring(0, dot);
+  var detailName = p.substring(0, dot);
+  // var categoryName = path.split(link);
+  var components = path.split(link);
+  var categoryName = components[components.length - 2];
+  return '$categoryName-$detailName';
 }

web/samples_index/lib/src/cookbook.json

@@ -5,7 +5,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/page-route-animation.png",
+					"url": "images/cookbook/animation-page-route-animation.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -30,7 +30,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/physics-simulation.png",
+					"url": "images/cookbook/animation-physics-simulation.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -55,7 +55,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/animated-container.png",
+					"url": "images/cookbook/animation-animated-container.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -80,7 +80,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/opacity-animation.png",
+					"url": "images/cookbook/animation-opacity-animation.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -105,7 +105,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/drawer.png",
+					"url": "images/cookbook/design-drawer.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -130,7 +130,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/snackbars.png",
+					"url": "images/cookbook/design-snackbars.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -155,7 +155,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/package-fonts.png",
+					"url": "images/cookbook/design-package-fonts.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -180,7 +180,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/orientation.png",
+					"url": "images/cookbook/design-orientation.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -205,7 +205,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/fonts.png",
+					"url": "images/cookbook/design-fonts.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -230,7 +230,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/themes.png",
+					"url": "images/cookbook/design-themes.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -255,7 +255,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/tabs.png",
+					"url": "images/cookbook/design-tabs.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -280,7 +280,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/validation.png",
+					"url": "images/cookbook/forms-validation.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -305,7 +305,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/text-input.png",
+					"url": "images/cookbook/forms-text-input.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -330,7 +330,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/focus.png",
+					"url": "images/cookbook/forms-focus.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -355,7 +355,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/text-field-changes.png",
+					"url": "images/cookbook/forms-text-field-changes.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -380,7 +380,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/retrieve-input.png",
+					"url": "images/cookbook/forms-retrieve-input.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -405,7 +405,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/ripples.png",
+					"url": "images/cookbook/gestures-ripples.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -430,7 +430,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/handling-taps.png",
+					"url": "images/cookbook/gestures-handling-taps.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -455,7 +455,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/dismissible.png",
+					"url": "images/cookbook/gestures-dismissible.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -480,7 +480,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/network-image.png",
+					"url": "images/cookbook/images-network-image.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -505,7 +505,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/fading-in-images.png",
+					"url": "images/cookbook/images-fading-in-images.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -530,7 +530,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/cached-images.png",
+					"url": "images/cookbook/images-cached-images.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -555,7 +555,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/grid-lists.png",
+					"url": "images/cookbook/lists-grid-lists.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -580,7 +580,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/horizontal-list.png",
+					"url": "images/cookbook/lists-horizontal-list.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -605,7 +605,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/mixed-list.png",
+					"url": "images/cookbook/lists-mixed-list.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -630,7 +630,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/floating-app-bar.png",
+					"url": "images/cookbook/lists-floating-app-bar.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -655,7 +655,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/basic-list.png",
+					"url": "images/cookbook/lists-basic-list.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -680,7 +680,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/long-lists.png",
+					"url": "images/cookbook/lists-long-lists.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -705,7 +705,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/error-reporting.png",
+					"url": "images/cookbook/maintenance-error-reporting.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -730,7 +730,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/hero-animations.png",
+					"url": "images/cookbook/navigation-hero-animations.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -755,7 +755,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/navigation-basics.png",
+					"url": "images/cookbook/navigation-navigation-basics.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -780,7 +780,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/named-routes.png",
+					"url": "images/cookbook/navigation-named-routes.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -805,7 +805,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/navigate-with-arguments.png",
+					"url": "images/cookbook/navigation-navigate-with-arguments.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -830,7 +830,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/returning-data.png",
+					"url": "images/cookbook/navigation-returning-data.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -855,7 +855,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/passing-data.png",
+					"url": "images/cookbook/navigation-passing-data.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -875,12 +875,37 @@
 			"date": null,
 			"channel": null
 		},
+		{
+			"name": "Delete data on the internet",
+			"author": "Flutter",
+			"screenshots": [
+				{
+					"url": "images/cookbook/networking-delete-data.png",
+					"alt": "Cookbook article"
+				}
+			],
+			"source": "https://flutter.dev/docs/cookbook/networking/delete-data.html",
+			"web": null,
+			"description": "This recipe covers how to delete data over\nthe internet using the http package.",
+			"difficulty": null,
+			"widgets": [],
+			"packages": [],
+			"tags": [
+				"cookbook",
+				"networking"
+			],
+			"platforms": [],
+			"links": [],
+			"type": "cookbook",
+			"date": null,
+			"channel": null
+		},
 		{
 			"name": "Fetch data from the internet",
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/fetch-data.png",
+					"url": "images/cookbook/networking-fetch-data.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -905,13 +930,13 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/authenticated-requests.png",
+					"url": "images/cookbook/networking-authenticated-requests.png",
 					"alt": "Cookbook article"
 				}
 			],
 			"source": "https://flutter.dev/docs/cookbook/networking/authenticated-requests.html",
 			"web": null,
-			"description": "To fetch data from many web services, you need to provide\nauthorization. There are many ways to do this, but perhaps the most common\nuses the Authorization HTTP header.",
+			"description": "To fetch data from most web services, you need to provide\nauthorization. There are many ways to do this,\nbut perhaps the most common uses the Authorization HTTP header.",
 			"difficulty": null,
 			"widgets": [],
 			"packages": [],
@@ -930,7 +955,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/background-parsing.png",
+					"url": "images/cookbook/networking-background-parsing.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -955,13 +980,38 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/send-data.png",
+					"url": "images/cookbook/networking-send-data.png",
 					"alt": "Cookbook article"
 				}
 			],
 			"source": "https://flutter.dev/docs/cookbook/networking/send-data.html",
 			"web": null,
-			"description": "Sending data to the internet is necessary for most apps.\nThe http package has got it covered too.",
+			"description": "Sending data to the internet is necessary for most apps.\nThe http package has got that covered, too.",
+			"difficulty": null,
+			"widgets": [],
+			"packages": [],
+			"tags": [
+				"cookbook",
+				"networking"
+			],
+			"platforms": [],
+			"links": [],
+			"type": "cookbook",
+			"date": null,
+			"channel": null
+		},
+		{
+			"name": "Update data over the internet",
+			"author": "Flutter",
+			"screenshots": [
+				{
+					"url": "images/cookbook/networking-update-data.png",
+					"alt": "Cookbook article"
+				}
+			],
+			"source": "https://flutter.dev/docs/cookbook/networking/update-data.html",
+			"web": null,
+			"description": "Updating data over the internet is necessary for most apps.\nThe http package has got that covered!",
 			"difficulty": null,
 			"widgets": [],
 			"packages": [],
@@ -980,7 +1030,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/web-sockets.png",
+					"url": "images/cookbook/networking-web-sockets.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1005,13 +1055,13 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/sqlite.png",
+					"url": "images/cookbook/persistence-sqlite.png",
 					"alt": "Cookbook article"
 				}
 			],
 			"source": "https://flutter.dev/docs/cookbook/persistence/sqlite.html",
 			"web": null,
-			"description": "If writing an app that needs to persist and query larger amounts of data on\nthe local device, consider using a database instead of a local file or\nkey-value store. In general, databases provide faster inserts, updates,\nand queries, compared to other local persistence solutions.",
+			"description": "If you are writing an app that needs to persist and query large amounts of data on\nthe local device, consider using a database instead of a local file or\nkey-value store. In general, databases provide faster inserts, updates,\nand queries compared to other local persistence solutions.",
 			"difficulty": null,
 			"widgets": [],
 			"packages": [],
@@ -1030,7 +1080,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/reading-writing-files.png",
+					"url": "images/cookbook/persistence-reading-writing-files.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1055,7 +1105,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/key-value.png",
+					"url": "images/cookbook/persistence-key-value.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1080,7 +1130,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/play-video.png",
+					"url": "images/cookbook/plugins-play-video.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1105,7 +1155,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/picture-using-camera.png",
+					"url": "images/cookbook/plugins-picture-using-camera.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1130,13 +1180,13 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/introduction.png",
+					"url": "images/cookbook/integration-introduction.png",
 					"alt": "Cookbook article"
 				}
 			],
 			"source": "https://flutter.dev/docs/cookbook/testing/integration/introduction.html",
 			"web": null,
-			"description": "Unit tests and widget tests are handy for testing individual classes,\nfunctions, or widgets. However, they generally don’t test how\nindividual pieces work together as a whole or capture the performance\nof an application running on a real device. These tasks are performed\nwith integration tests.",
+			"description": "Unit tests and widget tests are handy for testing individual classes,\nfunctions, or widgets. However, they generally don’t test how\nindividual pieces work together as a whole, or capture the performance\nof an application running on a real device. These tasks are performed\nwith integration tests.",
 			"difficulty": null,
 			"widgets": [],
 			"packages": [],
@@ -1155,7 +1205,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/scrolling.png",
+					"url": "images/cookbook/integration-scrolling.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1180,7 +1230,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/profiling.png",
+					"url": "images/cookbook/integration-profiling.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1205,13 +1255,13 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/introduction.png",
+					"url": "images/cookbook/unit-introduction.png",
 					"alt": "Cookbook article"
 				}
 			],
 			"source": "https://flutter.dev/docs/cookbook/testing/unit/introduction.html",
 			"web": null,
-			"description": "How can you ensure that your app continues to work as you add more features or\nchange existing functionality? By writing tests.",
+			"description": "How can you ensure that your app continues to work as you\nadd more features or change existing functionality?\nBy writing tests.",
 			"difficulty": null,
 			"widgets": [],
 			"packages": [],
@@ -1230,7 +1280,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/mocking.png",
+					"url": "images/cookbook/unit-mocking.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1255,7 +1305,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/introduction.png",
+					"url": "images/cookbook/widget-introduction.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1280,7 +1330,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/finders.png",
+					"url": "images/cookbook/widget-finders.png",
 					"alt": "Cookbook article"
 				}
 			],
@@ -1305,7 +1355,7 @@
 			"author": "Flutter",
 			"screenshots": [
 				{
-					"url": "images/cookbook/tap-drag.png",
+					"url": "images/cookbook/widget-tap-drag.png",
 					"alt": "Cookbook article"
 				}
 			],

web/samples_index/lib/src/samples.yaml

@@ -524,24 +524,6 @@ samples:
     web: web/timeflow
     type: demo
 
-  - name: Vision Challenge
-    author: Yukkei Choi
-    screenshots:
-      - url: images/vision_challenge1.png
-        alt: Vision Challenge screenshot
-      - url: images/vision_challenge2.png
-        alt: Vision Challenge screenshot
-    source: https://github.com/flutter/samples/tree/master/web/vision_challenge
-    description: >
-      A fun game to test your color perception abilities.
-    difficulty: advanced
-    widgets: []
-    packages: []
-    platforms: ['web']
-    tags: ['demo', 'game']
-    web: web/vision_challenge
-    type: demo
-    
   - name: Dice
     author: Jaime Blasco
     screenshots: