diff --git a/README.md b/README.md
index dea7aff..7257fbe 100644
--- a/README.md
+++ b/README.md
@@ -135,10 +135,9 @@ Check proposal documents for [v1.0](https://github.com/fluttercommunity/backdrop
 2. Fork the [repository](https://github.com/fluttercommunity/backdrop).
 3. Pick an issue to work on from [issue tracker](https://github.com/fluttercommunity/backdrop/issues).
 4. Implement it.
-5. Add your name and email in `authors` section in `pubspec.yaml` file.
-6. Send merge request.
-7. Star this project.
-8. Become a hero!!
+5. Send merge request.
+6. Star this project.
+7. Become a hero!!
 
 ## Features and bugs
 Please file feature requests and bugs at the [issue tracker](https://github.com/fluttercommunity/backdrop/issues).
diff --git a/analysis_options.yaml b/analysis_options.yaml
index 6715b49..c64af5a 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1,13 +1,35 @@
-include: package:pedantic/analysis_options.yaml
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
 
-analyzer:
-  exclude: [build/**]
-  strong-mode:
-    implicit-casts: false
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
 
 linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
   rules:
-    - camel_case_types
-    - public_member_api_docs
+    # doc-style related: https://dart.dev/guides/language/effective-dart/documentation
     - package_api_docs
+    - public_member_api_docs
+    - comment_references
     - slash_for_doc_comments
+    # pub related: https://dart.dev/tools/linter-rules#pub-rules
+    - depend_on_referenced_packages
+    - secure_pubspec_urls
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/demo/lib/main.dart b/demo/lib/main.dart
index dee23a6..bcedc14 100644
--- a/demo/lib/main.dart
+++ b/demo/lib/main.dart
@@ -7,23 +7,28 @@ import 'package:flutter/material.dart';
 import 'package:gallerize/gallerize.dart';
 import 'package:gallerize/themes/gallerize_theme_data.dart';
 
-void main() => runApp(DemoApp());
+void main() => runApp(const DemoApp());
 
 /// Demo app that provides a show-case of different backdrop use cases.
 class DemoApp extends StatelessWidget {
+  /// Default constructor for [DemoApp].
+  const DemoApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       title: "Backdrop Gallery",
       theme: GallerizeThemeData.darkThemeData,
-      home: HomePage(),
+      home: _HomePage(),
     );
   }
 }
 
 /// The home page of the demo app showing a selection of use cases.
-class HomePage extends StatelessWidget {
-  List<UseCase> _useCases = [
+class _HomePage extends StatelessWidget {
+  _HomePage({Key? key}) : super(key: key);
+
+  final _useCases = <UseCase>[
     ContextualInfoUseCase(),
     ContextualControlsUseCase(),
     NavigationUseCase(),
@@ -34,16 +39,16 @@ class HomePage extends StatelessWidget {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text("Backdrop Gallery"),
+        title: const Text("Backdrop Gallery"),
       ),
       body: Column(
         children: [
           Container(
-            margin: EdgeInsets.all(16.0),
-            child:
-                Text("This app shows some use cases for the backdrop widget. "
-                    "Open any one to show information about it, preview it and "
-                    "look at its code."),
+            margin: const EdgeInsets.all(16.0),
+            child: const Text(
+                "This app shows some use cases for the backdrop widget. "
+                "Open any one to show information about it, preview it and "
+                "look at its code."),
           ),
           ListView.separated(
             itemCount: _useCases.length,
@@ -52,7 +57,7 @@ class HomePage extends StatelessWidget {
               onTap: () => _openDemoPage(context, _useCases[index]),
             ),
             shrinkWrap: true,
-            separatorBuilder: (context, index) => Divider(),
+            separatorBuilder: (context, index) => const Divider(),
           ),
         ],
       ),
diff --git a/demo/lib/use_cases/contextual_controls/contextual_controls.dart b/demo/lib/use_cases/contextual_controls/contextual_controls.dart
index ebc2f87..344468a 100644
--- a/demo/lib/use_cases/contextual_controls/contextual_controls.dart
+++ b/demo/lib/use_cases/contextual_controls/contextual_controls.dart
@@ -3,22 +3,25 @@ import 'package:flutter/material.dart';
 
 /// Contextual controls preview app.
 class ContextualControls extends StatefulWidget {
+  /// Default constructor for [ContextualControls].
+  const ContextualControls({Key? key}) : super(key: key);
+
   @override
   _ContextualControlsState createState() => _ContextualControlsState();
 }
 
 class _ContextualControlsState extends State<ContextualControls> {
-  static final _COLOR_MAP = {
+  static final _colorMap = {
     Colors.black: "Black",
     Colors.red: "Red",
     Colors.green: "Green",
     Colors.blue: "Blue"
   };
-  static const _RAM_CHOICES = [4, 8, 16];
+  static const _ramChoices = [4, 8, 16];
 
-  Color _color = _COLOR_MAP.keys.first;
+  Color _color = _colorMap.keys.first;
   double _resolution = 15.0;
-  int _ram = _RAM_CHOICES.first;
+  int _ram = _ramChoices.first;
 
   @override
   Widget build(BuildContext context) {
@@ -26,7 +29,7 @@ class _ContextualControlsState extends State<ContextualControls> {
       data: ThemeData.light(),
       child: BackdropScaffold(
         appBar: BackdropAppBar(
-          title: Text("Contextual Controls Example"),
+          title: const Text("Contextual Controls Example"),
           automaticallyImplyLeading: false,
         ),
         backLayer: _createBackLayer(context),
@@ -41,7 +44,7 @@ class _ContextualControlsState extends State<ContextualControls> {
           ListTile(
             leading: Column(
               mainAxisAlignment: MainAxisAlignment.center,
-              children: [
+              children: const [
                 Text(
                   "Color",
                 ),
@@ -50,10 +53,10 @@ class _ContextualControlsState extends State<ContextualControls> {
             title: DropdownButton<Color>(
               isExpanded: true,
               value: _color,
-              items: _COLOR_MAP.keys.map<DropdownMenuItem<Color>>((Color c) {
+              items: _colorMap.keys.map<DropdownMenuItem<Color>>((Color c) {
                 return DropdownMenuItem<Color>(
                   value: c,
-                  child: Text(_COLOR_MAP[c]!),
+                  child: Text(_colorMap[c]!),
                 );
               }).toList(),
               onChanged: (Color? newValue) {
@@ -66,7 +69,7 @@ class _ContextualControlsState extends State<ContextualControls> {
           ListTile(
               leading: Column(
                 mainAxisAlignment: MainAxisAlignment.center,
-                children: [
+                children: const [
                   Text("Resolution"),
                 ],
               ),
@@ -86,14 +89,14 @@ class _ContextualControlsState extends State<ContextualControls> {
           ListTile(
             leading: Column(
               mainAxisAlignment: MainAxisAlignment.center,
-              children: [
+              children: const [
                 Text("RAM"),
               ],
             ),
             title: DropdownButton<int>(
               isExpanded: true,
               value: _ram,
-              items: _RAM_CHOICES.map<DropdownMenuItem<int>>((int r) {
+              items: _ramChoices.map<DropdownMenuItem<int>>((int r) {
                 return DropdownMenuItem<int>(
                   value: r,
                   child: Text("${r.toString()} GB"),
@@ -108,7 +111,7 @@ class _ContextualControlsState extends State<ContextualControls> {
           ),
           Builder(
               builder: (context) => MaterialButton(
-                    child: Text("Return to product page"),
+                    child: const Text("Return to product page"),
                     onPressed: () => Backdrop.of(context).fling(),
                   ))
         ],
@@ -116,7 +119,7 @@ class _ContextualControlsState extends State<ContextualControls> {
       );
 
   Widget _createFrontLayer(BuildContext context) => Container(
-        margin: EdgeInsets.all(16.0),
+        margin: const EdgeInsets.all(16.0),
         child: Column(
           children: [
             Row(
@@ -138,13 +141,13 @@ class _ContextualControlsState extends State<ContextualControls> {
               ],
             ),
             Container(
-              margin: EdgeInsets.all(8.0),
+              margin: const EdgeInsets.all(8.0),
               child: Row(
                 mainAxisSize: MainAxisSize.max,
                 mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                 children: [
                   Row(
-                    children: [
+                    children: const [
                       Icon(Icons.star, color: Colors.grey),
                       Icon(Icons.star, color: Colors.grey),
                       Icon(Icons.star, color: Colors.grey),
@@ -152,7 +155,7 @@ class _ContextualControlsState extends State<ContextualControls> {
                       Icon(Icons.star_half, color: Colors.grey),
                     ],
                   ),
-                  Text(
+                  const Text(
                     "73 Reviews",
                     style: TextStyle(color: Colors.grey),
                   )
@@ -163,13 +166,13 @@ class _ContextualControlsState extends State<ContextualControls> {
               mainAxisSize: MainAxisSize.max,
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
-                Text(
+                const Text(
                   "Price",
                   style: TextStyle(color: Colors.grey),
                 ),
                 Container(
-                  margin: EdgeInsets.all(8.0),
-                  child: Text(
+                  margin: const EdgeInsets.all(8.0),
+                  child: const Text(
                     "\$999",
                     style: TextStyle(fontSize: 18),
                   ),
@@ -177,7 +180,7 @@ class _ContextualControlsState extends State<ContextualControls> {
               ],
             ),
             Container(
-              margin: EdgeInsets.only(
+              margin: const EdgeInsets.only(
                   top: 32.0, left: 8.0, right: 8.0, bottom: 8.0),
               child: Row(
                 mainAxisAlignment: MainAxisAlignment.spaceEvenly,
@@ -185,17 +188,17 @@ class _ContextualControlsState extends State<ContextualControls> {
                 children: [
                   Column(
                     mainAxisAlignment: MainAxisAlignment.center,
-                    children: [Text("Resolution")],
+                    children: const [Text("Resolution")],
                   ),
                   Text(
                     "${_resolution.toString()}\"",
-                    style: TextStyle(fontWeight: FontWeight.bold),
+                    style: const TextStyle(fontWeight: FontWeight.bold),
                   ),
                 ],
               ),
             ),
             Container(
-              margin: EdgeInsets.only(
+              margin: const EdgeInsets.only(
                   top: 8.0, left: 8.0, right: 8.0, bottom: 32.0),
               child: Row(
                 mainAxisAlignment: MainAxisAlignment.spaceEvenly,
@@ -203,24 +206,24 @@ class _ContextualControlsState extends State<ContextualControls> {
                 children: [
                   Column(
                     mainAxisAlignment: MainAxisAlignment.center,
-                    children: [Text("RAM")],
+                    children: const [Text("RAM")],
                   ),
                   Text(
                     "${_ram.toString()} GB",
-                    style: TextStyle(fontWeight: FontWeight.bold),
+                    style: const TextStyle(fontWeight: FontWeight.bold),
                   ),
                 ],
               ),
             ),
             Container(
-              margin: EdgeInsets.all(16.0),
+              margin: const EdgeInsets.all(16.0),
               child: Row(
                 mainAxisSize: MainAxisSize.max,
                 mainAxisAlignment: MainAxisAlignment.spaceAround,
                 children: [
                   Builder(
-                    builder: (context) => RaisedButton(
-                      child: Text("Configure"),
+                    builder: (context) => ElevatedButton(
+                      child: const Text("Configure"),
                       onPressed: () => Backdrop.of(context).fling(),
                     ),
                   )
diff --git a/demo/lib/use_cases/contextual_controls/contextual_controls_use_case.dart b/demo/lib/use_cases/contextual_controls/contextual_controls_use_case.dart
index 677cf29..07a8e99 100644
--- a/demo/lib/use_cases/contextual_controls/contextual_controls_use_case.dart
+++ b/demo/lib/use_cases/contextual_controls/contextual_controls_use_case.dart
@@ -10,6 +10,6 @@ class ContextualControlsUseCase extends UseCase {
         "The backdrop's back layer can be used to control the content that is being "
         "shown on the front layer.";
     codeFile = "lib/use_cases/contextual_controls/contextual_controls.dart";
-    preview = ContextualControls();
+    preview = const ContextualControls();
   }
 }
diff --git a/demo/lib/use_cases/contextual_info/contextual_info.dart b/demo/lib/use_cases/contextual_info/contextual_info.dart
index dc48a5c..1bb495c 100644
--- a/demo/lib/use_cases/contextual_info/contextual_info.dart
+++ b/demo/lib/use_cases/contextual_info/contextual_info.dart
@@ -1,17 +1,18 @@
 import 'package:backdrop/backdrop.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/painting.dart';
-import 'package:flutter/rendering.dart';
 
 /// Contextual info preview app.
 class ContextualInfo extends StatelessWidget {
+  /// Default constructor for [ContextualInfo].
+  const ContextualInfo({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return Theme(
       data: ThemeData.light(),
       child: BackdropScaffold(
         appBar: BackdropAppBar(
-          title: Text("Contextual Info Example"),
+          title: const Text("Contextual Info Example"),
           automaticallyImplyLeading: false,
         ),
         backLayer: _createBackLayer(context),
@@ -26,13 +27,13 @@ class ContextualInfo extends StatelessWidget {
           ListTile(
             leading: Column(
               mainAxisAlignment: MainAxisAlignment.center,
-              children: [
+              children: const [
                 Text(
                   "Name",
                 ),
               ],
             ),
-            title: Text(
+            title: const Text(
               "Laptop Model X",
               style: TextStyle(fontWeight: FontWeight.bold),
             ),
@@ -40,11 +41,11 @@ class ContextualInfo extends StatelessWidget {
           ListTile(
             leading: Column(
               mainAxisAlignment: MainAxisAlignment.center,
-              children: [
+              children: const [
                 Text("Year of production"),
               ],
             ),
-            title: Text(
+            title: const Text(
               "2019",
               style: TextStyle(fontWeight: FontWeight.bold),
             ),
@@ -52,11 +53,11 @@ class ContextualInfo extends StatelessWidget {
           ListTile(
             leading: Column(
               mainAxisAlignment: MainAxisAlignment.center,
-              children: [
+              children: const [
                 Text("Place of Manufacture"),
               ],
             ),
-            title: Text(
+            title: const Text(
               "USA",
               style: TextStyle(fontWeight: FontWeight.bold),
             ),
@@ -64,11 +65,11 @@ class ContextualInfo extends StatelessWidget {
           ListTile(
             leading: Column(
               mainAxisAlignment: MainAxisAlignment.center,
-              children: [
+              children: const [
                 Text("Price"),
               ],
             ),
-            title: Text(
+            title: const Text(
               "\$999",
               style: TextStyle(fontWeight: FontWeight.bold),
             ),
@@ -78,14 +79,14 @@ class ContextualInfo extends StatelessWidget {
       );
 
   Widget _createFrontLayer(BuildContext context) => Container(
-        margin: EdgeInsets.all(16.0),
+        margin: const EdgeInsets.all(16.0),
         child: Column(
           children: [
             Row(
               mainAxisSize: MainAxisSize.max,
               mainAxisAlignment: MainAxisAlignment.spaceAround,
               children: [
-                Icon(
+                const Icon(
                   Icons.computer,
                   size: 64.0,
                 ),
@@ -102,13 +103,13 @@ class ContextualInfo extends StatelessWidget {
               mainAxisSize: MainAxisSize.max,
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
-                Text(
+                const Text(
                   "Price",
                   style: TextStyle(color: Colors.grey),
                 ),
                 Container(
-                  margin: EdgeInsets.all(8.0),
-                  child: Text(
+                  margin: const EdgeInsets.all(8.0),
+                  child: const Text(
                     "\$999",
                     style: TextStyle(fontSize: 18),
                   ),
@@ -116,13 +117,13 @@ class ContextualInfo extends StatelessWidget {
               ],
             ),
             Container(
-              margin: EdgeInsets.all(8.0),
+              margin: const EdgeInsets.all(8.0),
               child: Row(
                 mainAxisSize: MainAxisSize.max,
                 mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                 children: [
                   Row(
-                    children: [
+                    children: const [
                       Icon(Icons.star, color: Colors.grey),
                       Icon(Icons.star, color: Colors.grey),
                       Icon(Icons.star, color: Colors.grey),
@@ -130,7 +131,7 @@ class ContextualInfo extends StatelessWidget {
                       Icon(Icons.star_half, color: Colors.grey),
                     ],
                   ),
-                  Text(
+                  const Text(
                     "73 Reviews",
                     style: TextStyle(color: Colors.grey),
                   )
@@ -138,14 +139,14 @@ class ContextualInfo extends StatelessWidget {
               ),
             ),
             Container(
-              margin: EdgeInsets.all(16.0),
+              margin: const EdgeInsets.all(16.0),
               child: Row(
                 mainAxisSize: MainAxisSize.max,
                 mainAxisAlignment: MainAxisAlignment.spaceAround,
                 children: [
                   Builder(
-                    builder: (context) => RaisedButton(
-                      child: Text("More about this product"),
+                    builder: (context) => ElevatedButton(
+                      child: const Text("More about this product"),
                       onPressed: () => Backdrop.of(context).fling(),
                     ),
                   )
@@ -159,13 +160,13 @@ class ContextualInfo extends StatelessWidget {
                       .headline6!
                       .apply(color: Colors.black)),
             ),
-            ListTile(
+            const ListTile(
               leading: Icon(Icons.account_box),
               title: Text("Really satisfied!"),
               subtitle: Text("John Doe"),
               trailing: Text("5/5"),
             ),
-            ListTile(
+            const ListTile(
               leading: Icon(Icons.account_box),
               title: Text("Good price!"),
               subtitle: Text("Jane Doe"),
diff --git a/demo/lib/use_cases/contextual_info/contextual_info_use_case.dart b/demo/lib/use_cases/contextual_info/contextual_info_use_case.dart
index 0bdadd2..072f600 100644
--- a/demo/lib/use_cases/contextual_info/contextual_info_use_case.dart
+++ b/demo/lib/use_cases/contextual_info/contextual_info_use_case.dart
@@ -10,6 +10,6 @@ class ContextualInfoUseCase extends UseCase {
         "The backdrop's back layer can be used to show contextual information "
         "in addition to the content shown on the front layer.";
     codeFile = "lib/use_cases/contextual_info/contextual_info.dart";
-    preview = ContextualInfo();
+    preview = const ContextualInfo();
   }
 }
diff --git a/demo/lib/use_cases/filter/filter.dart b/demo/lib/use_cases/filter/filter.dart
index 974b418..8545fb2 100644
--- a/demo/lib/use_cases/filter/filter.dart
+++ b/demo/lib/use_cases/filter/filter.dart
@@ -4,25 +4,30 @@ import 'package:flutter/material.dart';
 
 /// Filter preview app.
 class Filter extends StatefulWidget {
+  /// Default constructor for [Filter].
+  const Filter({Key? key}) : super(key: key);
+
   @override
   _FilterState createState() => _FilterState();
 }
 
 class _FilterState extends State<Filter> {
-  static const List<ItemCategory> _CATEGORIES = [
-    ItemCategory.Electronics,
-    ItemCategory.Transportation
+  static const List<ItemCategory> _categories = [
+    ItemCategory.electronics,
+    ItemCategory.transportation
   ];
-  static const List<Item> _ITEMS = [
-    Item(Icons.computer, "Laptop", ItemCategory.Electronics),
-    Item(Icons.child_friendly, "Stroller", ItemCategory.Transportation),
-    Item(Icons.tv, "TV", ItemCategory.Electronics),
-    Item(Icons.smartphone, "Smartphone", ItemCategory.Electronics),
-    Item(Icons.directions_car, "Car", ItemCategory.Transportation),
-    Item(Icons.motorcycle, "Motorcycle", ItemCategory.Transportation),
+  static const List<Item> _items = [
+    Item(Icons.computer, "Laptop", ItemCategory.electronics),
+    Item(Icons.child_friendly, "Stroller", ItemCategory.transportation),
+    Item(Icons.tv, "TV", ItemCategory.electronics),
+    Item(Icons.smartphone, "Smartphone", ItemCategory.electronics),
+    Item(Icons.directions_car, "Car", ItemCategory.transportation),
+    Item(Icons.motorcycle, "Motorcycle", ItemCategory.transportation),
   ];
-  Set<ItemCategory> _filteredCategories =
-      Set.from([ItemCategory.Electronics, ItemCategory.Transportation]);
+  final _filteredCategories = <ItemCategory>{
+    ItemCategory.electronics,
+    ItemCategory.transportation
+  };
   late List<Item> _shownItems;
 
   @override
@@ -37,7 +42,7 @@ class _FilterState extends State<Filter> {
       data: ThemeData.light(),
       child: BackdropScaffold(
         appBar: BackdropAppBar(
-          title: Text("Filter Example"),
+          title: const Text("Filter Example"),
         ),
         backLayer: _createBackLayer(),
         subHeader: BackdropSubHeader(
@@ -62,18 +67,18 @@ class _FilterState extends State<Filter> {
         mainAxisSize: MainAxisSize.min,
         children: [
           Container(
-            padding: EdgeInsets.all(16.0),
-            child: Text(
+            padding: const EdgeInsets.all(16.0),
+            child: const Text(
               "Check/uncheck categories to show/hide them on the front layer",
             ),
           ),
           ListView.builder(
-            itemCount: _CATEGORIES.length,
+            itemCount: _categories.length,
             itemBuilder: (context, index) => CheckboxListTile(
               onChanged: (bool? checked) =>
-                  _addOrRemoveFilterCategory(checked!, _CATEGORIES[index]),
-              value: _filteredCategories.contains(_CATEGORIES[index]),
-              title: Text(describeEnum(_CATEGORIES[index].toString())),
+                  _addOrRemoveFilterCategory(checked!, _categories[index]),
+              value: _filteredCategories.contains(_categories[index]),
+              title: Text(describeEnum(_categories[index].toString())),
               activeColor: Colors.white,
               checkColor: Theme.of(context).primaryColor,
             ),
@@ -84,7 +89,7 @@ class _FilterState extends State<Filter> {
 
   void _filterItems() {
     setState(() {
-      _shownItems = _ITEMS
+      _shownItems = _items
           .where((element) => _filteredCategories.contains(element.category))
           .toList();
     });
@@ -108,10 +113,10 @@ class _FilterState extends State<Filter> {
 /// Enum defining the different item categories we have.
 enum ItemCategory {
   /// Electronics item category.
-  Electronics,
+  electronics,
 
   /// Transportation item category.
-  Transportation
+  transportation
 }
 
 /// Class representing an online shop item.
diff --git a/demo/lib/use_cases/filter/filter_use_case.dart b/demo/lib/use_cases/filter/filter_use_case.dart
index d8668ad..7873b0f 100644
--- a/demo/lib/use_cases/filter/filter_use_case.dart
+++ b/demo/lib/use_cases/filter/filter_use_case.dart
@@ -10,6 +10,6 @@ class FilterUseCase extends UseCase {
         "The backdrop's back layer can be used to filter the content displayed "
         "on the front layer.";
     codeFile = "lib/use_cases/filter/filter.dart";
-    preview = Filter();
+    preview = const Filter();
   }
 }
diff --git a/demo/lib/use_cases/navigation/navigation.dart b/demo/lib/use_cases/navigation/navigation.dart
index 3e913df..b239dd3 100644
--- a/demo/lib/use_cases/navigation/navigation.dart
+++ b/demo/lib/use_cases/navigation/navigation.dart
@@ -3,13 +3,16 @@ import 'package:flutter/material.dart';
 
 /// Navigation preview app.
 class Navigation extends StatefulWidget {
+  /// Default constructor for [Navigation].
+  const Navigation({Key? key}) : super(key: key);
+
   @override
   _NavigationState createState() => _NavigationState();
 }
 
 class _NavigationState extends State<Navigation> {
   int _currentIndex = 0;
-  final List<Widget> _pages = [HomePage(), ItemsPage()];
+  final List<Widget> _pages = [const _HomePage(), const _ItemsPage()];
 
   @override
   Widget build(BuildContext context) {
@@ -17,14 +20,14 @@ class _NavigationState extends State<Navigation> {
       data: ThemeData.light(),
       child: BackdropScaffold(
         appBar: BackdropAppBar(
-          title: Text("Navigation Example"),
+          title: const Text("Navigation Example"),
         ),
         stickyFrontLayer: true,
         frontLayer: _pages[_currentIndex],
         backLayer: _createBackLayer(),
         subHeader: _currentIndex == 0
             ? null // no subHeader for home-page
-            : BackdropSubHeader(
+            : const BackdropSubHeader(
                 title: Text("Our products"),
               ),
       ),
@@ -32,7 +35,7 @@ class _NavigationState extends State<Navigation> {
   }
 
   Widget _createBackLayer() => BackdropNavigationBackLayer(
-        items: [
+        items: const [
           ListTile(
               title: Text(
             "Home",
@@ -43,19 +46,21 @@ class _NavigationState extends State<Navigation> {
           )),
         ],
         onTap: (int position) => {setState(() => _currentIndex = position)},
-        separator: Divider(),
+        separator: const Divider(),
       );
 }
 
 /// Home page of the online shop.
-class HomePage extends StatelessWidget {
+class _HomePage extends StatelessWidget {
+  const _HomePage({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return Column(
       children: [
         Center(
           child: Container(
-            margin: EdgeInsets.all(16.0),
+            margin: const EdgeInsets.all(16.0),
             child: Text(
               "Welcome to the online shop!",
               style: Theme.of(context).textTheme.headline6,
@@ -64,8 +69,8 @@ class HomePage extends StatelessWidget {
           ),
         ),
         Container(
-          margin: EdgeInsets.all(16.0),
-          child: Text(
+          margin: const EdgeInsets.all(16.0),
+          child: const Text(
             "Please navigate to the products page to choose your product.",
             textAlign: TextAlign.center,
           ),
@@ -76,11 +81,13 @@ class HomePage extends StatelessWidget {
 }
 
 /// Items page showing the online shop's products.
-class ItemsPage extends StatelessWidget {
+class _ItemsPage extends StatelessWidget {
+  const _ItemsPage({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return ListView(
-      children: [
+      children: const [
         ListTile(
           leading: Icon(Icons.computer),
           title: Text("Laptop"),
diff --git a/demo/lib/use_cases/navigation/navigation_use_case.dart b/demo/lib/use_cases/navigation/navigation_use_case.dart
index a3f785d..20e7013 100644
--- a/demo/lib/use_cases/navigation/navigation_use_case.dart
+++ b/demo/lib/use_cases/navigation/navigation_use_case.dart
@@ -11,6 +11,6 @@ class NavigationUseCase extends UseCase {
         "The back layer shows the navigation options and upon selecting any "
         "one, the front layer changes its content.";
     codeFile = "lib/use_cases/navigation/navigation.dart";
-    preview = Navigation();
+    preview = const Navigation();
   }
 }
diff --git a/demo/pubspec.yaml b/demo/pubspec.yaml
index 5c9a8a2..98fd028 100644
--- a/demo/pubspec.yaml
+++ b/demo/pubspec.yaml
@@ -32,6 +32,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  flutter_lints: ^1.0.4
   flutter_launcher_icons: ^0.9.0
 
 flutter_icons:
diff --git a/demo/test/widget_test.dart b/demo/test/widget_test.dart
index ba39bc6..6b53067 100644
--- a/demo/test/widget_test.dart
+++ b/demo/test/widget_test.dart
@@ -5,15 +5,14 @@
 // gestures. You can also use WidgetTester to find child widgets in the widget
 // tree, read text, and verify that the values of widget properties are correct.
 
+import 'package:demo/main.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import 'package:demo/main.dart';
-
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(DemoApp());
+    await tester.pumpWidget(const DemoApp());
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 6a2668f..5831b25 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -7,29 +7,33 @@
 import 'package:backdrop/backdrop.dart';
 import 'package:flutter/material.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
+/// Example app for demoing [BackdropScaffold]
 class MyApp extends StatelessWidget {
+  /// Default constructor for [MyApp].
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       title: 'Backdrop Demo',
       home: BackdropScaffold(
         appBar: BackdropAppBar(
-          title: Text("Backdrop Example"),
-          actions: <Widget>[
+          title: const Text("Backdrop Example"),
+          actions: const <Widget>[
             BackdropToggleButton(
               icon: AnimatedIcons.list_view,
             )
           ],
         ),
-        backLayer: Center(
+        backLayer: const Center(
           child: Text("Back Layer"),
         ),
-        subHeader: BackdropSubHeader(
+        subHeader: const BackdropSubHeader(
           title: Text("Sub Header"),
         ),
-        frontLayer: Center(
+        frontLayer: const Center(
           child: Text("Front Layer"),
         ),
       ),
diff --git a/example/lib/menu_variable_height_front_layer.dart b/example/lib/menu_variable_height_front_layer.dart
index 0a860a2..7728239 100644
--- a/example/lib/menu_variable_height_front_layer.dart
+++ b/example/lib/menu_variable_height_front_layer.dart
@@ -1,10 +1,13 @@
 import 'package:backdrop/backdrop.dart';
 import 'package:flutter/material.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 /// Showcase for a Material Backdrop acting as a menu.
 class MyApp extends StatefulWidget {
+  /// Default constructor for [MyApp].
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   _MyAppState createState() => _MyAppState();
 }
@@ -21,7 +24,7 @@ class _MyAppState extends State<MyApp> {
       10,
       (i) => ListTile(
           title: Text('Menu: open page #$i',
-              style: TextStyle(color: Colors.white))));
+              style: const TextStyle(color: Colors.white))));
 
   double get _heightFactor => _currentIndex == 0 ? 1 : (.1 * _currentIndex);
 
@@ -29,18 +32,18 @@ class _MyAppState extends State<MyApp> {
   Widget build(BuildContext context) => MaterialApp(
       title: 'Backdrop Demo',
       home: BackdropScaffold(
-          appBar: BackdropAppBar(title: Text("AppBar is OK 👍")),
+          appBar: BackdropAppBar(title: const Text("AppBar is OK 👍")),
           frontLayer: _pages[_currentIndex],
           stickyFrontLayer: true,
           backLayerScrim: Colors.red.withOpacity(0.5),
           frontLayerScrim: Colors.green.withOpacity(0.5),
           frontLayerActiveFactor: _heightFactor,
-          subHeader: BackdropSubHeader(title: Text('Subheader')),
+          subHeader: const BackdropSubHeader(title: Text('Subheader')),
           backLayer: BackdropNavigationBackLayer(
               items: _nav,
               onTap: (int position) =>
                   {setState(() => _currentIndex = position)},
-              separatorBuilder: (_, __) => _MyDivider())));
+              separatorBuilder: (_, __) => const _MyDivider())));
 }
 
 class _MyDivider extends StatelessWidget {
@@ -48,7 +51,7 @@ class _MyDivider extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) =>
-      Divider(indent: 16, endIndent: 16, color: Colors.white);
+      const Divider(indent: 16, endIndent: 16, color: Colors.white);
 }
 
 /// When the front layer doesn't have much content, its height while revealed
@@ -56,7 +59,7 @@ class _MyDivider extends StatelessWidget {
 class _ShortPage extends StatelessWidget {
   final int index;
 
-  _ShortPage(this.index);
+  const _ShortPage(this.index);
 
   @override
   Widget build(BuildContext context) => Center(
@@ -66,9 +69,9 @@ class _ShortPage extends StatelessWidget {
               children: [
             Text("Page #$index is open with desired height."),
             const Flexible(child: FractionallySizedBox(heightFactor: 0.1)),
-            Text("It looks better! 😄"),
+            const Text("It looks better! 😄"),
             const Flexible(child: FractionallySizedBox(heightFactor: 0.1)),
-            Text("But Page #0 still needs to be tall."),
+            const Text("But Page #0 still needs to be tall."),
           ]));
 }
 
@@ -78,7 +81,7 @@ class _TallPage extends StatelessWidget {
   Widget build(BuildContext context) => ListView(
       children: List.generate(
           20,
-          (index) => Padding(
-              padding: const EdgeInsets.all(16),
+          (index) => const Padding(
+              padding: EdgeInsets.all(16),
               child: Text("Tall page #0, lots of content 👍"))));
 }
diff --git a/example/lib/navigation.dart b/example/lib/navigation.dart
index 81ea678..cfbe656 100644
--- a/example/lib/navigation.dart
+++ b/example/lib/navigation.dart
@@ -1,16 +1,20 @@
 import 'package:backdrop/backdrop.dart';
 import 'package:flutter/material.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
+/// Example app for demoing [BackdropNavigationBackLayer]
 class MyApp extends StatefulWidget {
+  /// Default constructor for [MyApp].
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   _MyAppState createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> {
   int _currentIndex = 0;
-  final List<Widget> _pages = [Widget1(), Widget2()];
+  final List<Widget> _pages = [const _Widget1(), const _Widget2()];
 
   @override
   Widget build(BuildContext context) {
@@ -18,8 +22,8 @@ class _MyAppState extends State<MyApp> {
       title: 'Backdrop Demo',
       home: BackdropScaffold(
         appBar: BackdropAppBar(
-          title: Text("Navigation Example"),
-          actions: <Widget>[
+          title: const Text("Navigation Example"),
+          actions: const <Widget>[
             BackdropToggleButton(
               icon: AnimatedIcons.list_view,
             )
@@ -28,28 +32,32 @@ class _MyAppState extends State<MyApp> {
         stickyFrontLayer: true,
         frontLayer: _pages[_currentIndex],
         backLayer: BackdropNavigationBackLayer(
-          items: [
+          items: const [
             ListTile(title: Text("Widget 1")),
             ListTile(title: Text("Widget 2")),
           ],
           onTap: (int position) => {setState(() => _currentIndex = position)},
-          separatorBuilder: (context, index) => Divider(),
+          separatorBuilder: (context, index) => const Divider(),
         ),
       ),
     );
   }
 }
 
-class Widget1 extends StatelessWidget {
+class _Widget1 extends StatelessWidget {
+  const _Widget1({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return Center(child: Text("Widget 1"));
+    return const Center(child: Text("Widget 1"));
   }
 }
 
-class Widget2 extends StatelessWidget {
+class _Widget2 extends StatelessWidget {
+  const _Widget2({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return Center(child: Text("Widget 2"));
+    return const Center(child: Text("Widget 2"));
   }
 }
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 6539278..d6e8a8f 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -15,6 +15,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  flutter_lints: ^1.0.4
 
 
 # For information on the generic Dart part of this file, see the
diff --git a/example/test/widget_test.dart b/example/test/widget_test.dart
index 717e98a..db796b0 100644
--- a/example/test/widget_test.dart
+++ b/example/test/widget_test.dart
@@ -11,7 +11,7 @@ import 'package:flutter_test/flutter_test.dart';
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
+    await tester.pumpWidget(const MyApp());
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);
diff --git a/lib/app_bar.dart b/lib/app_bar.dart
index 0a15a5f..2c32e34 100644
--- a/lib/app_bar.dart
+++ b/lib/app_bar.dart
@@ -1,4 +1,5 @@
 import 'package:backdrop/button.dart';
+import 'package:backdrop/scaffold.dart';
 import 'package:flutter/material.dart';
 
 /// Deprecated. Not needed anymore when [BackdropAppBar] is used.
@@ -25,7 +26,7 @@ enum BackdropIconPosition {
 /// [AppBar] class.
 ///
 /// What differs from the [AppBar] implementation is the behaviour of
-/// [BackdropScaffold.leading] and [BackdropScaffold.automaticallyImplyLeading].
+/// [BackdropAppBar.leading] and [BackdropAppBar.automaticallyImplyLeading].
 ///
 /// Usage example:
 /// ```dart
@@ -147,12 +148,7 @@ class BackdropAppBar extends StatelessWidget implements PreferredSizeWidget {
     this.titleSpacing = NavigationToolbar.kMiddleSpacing,
     this.toolbarOpacity = 1.0,
     this.bottomOpacity = 1.0,
-  })  : assert(automaticallyImplyLeading != null),
-        assert(elevation == null || elevation >= 0.0),
-        assert(primary != null),
-        assert(titleSpacing != null),
-        assert(toolbarOpacity != null),
-        assert(bottomOpacity != null),
+  })  : assert(elevation >= 0.0),
         preferredSize = Size.fromHeight(
             kToolbarHeight + (bottom?.preferredSize.height ?? 0.0)),
         super(key: key);
@@ -161,7 +157,7 @@ class BackdropAppBar extends StatelessWidget implements PreferredSizeWidget {
   Widget build(BuildContext context) {
     return AppBar(
       leading: leading ??
-          (automaticallyImplyLeading ? BackdropToggleButton() : null),
+          (automaticallyImplyLeading ? const BackdropToggleButton() : null),
       automaticallyImplyLeading: automaticallyImplyLeading,
       title: title,
       actions: actions,
diff --git a/lib/button.dart b/lib/button.dart
index d6718f6..657a652 100644
--- a/lib/button.dart
+++ b/lib/button.dart
@@ -1,3 +1,4 @@
+import 'package:backdrop/app_bar.dart';
 import 'package:backdrop/scaffold.dart';
 import 'package:flutter/material.dart';
 
@@ -39,9 +40,10 @@ class BackdropToggleButton extends StatelessWidget {
 
   /// Creates an instance of [BackdropToggleButton].
   const BackdropToggleButton({
+    Key? key,
     this.icon = AnimatedIcons.close_menu,
     this.color = Colors.white,
-  });
+  }) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
diff --git a/lib/navigation.dart b/lib/navigation.dart
index 60cdebf..fa055c0 100644
--- a/lib/navigation.dart
+++ b/lib/navigation.dart
@@ -76,8 +76,7 @@ class BackdropNavigationBackLayer extends StatelessWidget {
     this.itemPadding,
     this.itemSplashBorder,
     this.itemSplashColor,
-  })  : assert(items != null),
-        assert(items.isNotEmpty),
+  })  : assert(items.isNotEmpty),
         super(key: key);
 
   @override
diff --git a/lib/scaffold.dart b/lib/scaffold.dart
index 4b6b969..6b60e46 100644
--- a/lib/scaffold.dart
+++ b/lib/scaffold.dart
@@ -24,7 +24,7 @@ class Backdrop extends InheritedWidget {
   final BackdropScaffoldState data;
 
   /// Creates a [Backdrop] instance.
-  Backdrop({Key? key, required this.data, required Widget child})
+  const Backdrop({Key? key, required this.data, required Widget child})
       : super(key: key, child: child);
 
   /// Provides access to the state from everywhere in the widget tree.
@@ -32,7 +32,7 @@ class Backdrop extends InheritedWidget {
       context.dependOnInheritedWidgetOfExactType<Backdrop>()!.data;
 
   @override
-  bool updateShouldNotify(Backdrop old) => true;
+  bool updateShouldNotify(Backdrop oldWidget) => true;
 }
 
 /// Implements the basic functionality of backdrop.
@@ -153,15 +153,14 @@ class BackdropScaffold extends StatefulWidget {
   /// Defaults to `false`.
   final bool revealBackLayerAtStart;
 
-  /// The animation curve passed to [Tween.animate] when triggering
-  /// the backdrop animation.
+  /// The animation curve used for the backdrop animation.
   ///
   /// Defaults to [Curves.ease].
   final Curve animationCurve;
 
-  /// The reverse animation curve passed to [Tween.animate].
+  /// The reverse animation curve used for the backdrop animation.
   ///
-  /// If not set, [animationCurve.flipped] is used.
+  /// If not set, [Curve.flipped] member of [animationCurve] is used.
   final Curve? reverseAnimationCurve;
 
   /// Background [Color] for the back layer.
@@ -413,7 +412,7 @@ class BackdropScaffoldState extends State<BackdropScaffold>
         widget.controller ??
         AnimationController(
           vsync: this,
-          duration: Duration(milliseconds: 200),
+          duration: const Duration(milliseconds: 200),
           value: widget.revealBackLayerAtStart ? 0 : 1,
         );
 
@@ -673,26 +672,24 @@ class BackdropScaffoldState extends State<BackdropScaffold>
             AppBar(
               title: widget.title,
               actions: widget.iconPosition == BackdropIconPosition.action
-                  ? <Widget>[BackdropToggleButton()] + widget.actions
+                  ? <Widget>[const BackdropToggleButton()] + widget.actions
                   : widget.actions,
               elevation: 0,
               leading: widget.iconPosition == BackdropIconPosition.leading
-                  ? BackdropToggleButton()
+                  ? const BackdropToggleButton()
                   : null,
             ),
         body: LayoutBuilder(
           builder: (context, constraints) {
-            return Container(
-              child: Stack(
-                fit: StackFit.expand,
-                children: <Widget>[
-                  _buildBackPanel(),
-                  PositionedTransition(
-                    rect: _getPanelAnimation(context, constraints),
-                    child: _buildFrontPanel(context),
-                  ),
-                ],
-              ),
+            return Stack(
+              fit: StackFit.expand,
+              children: <Widget>[
+                _buildBackPanel(),
+                PositionedTransition(
+                  rect: _getPanelAnimation(context, constraints),
+                  child: _buildFrontPanel(context),
+                ),
+              ],
             );
           },
         ),
diff --git a/lib/sub_header.dart b/lib/sub_header.dart
index 9a521e7..fe875ef 100644
--- a/lib/sub_header.dart
+++ b/lib/sub_header.dart
@@ -69,8 +69,7 @@ class BackdropSubHeader extends StatelessWidget {
     this.automaticallyImplyTrailing = true,
     this.leading,
     this.trailing,
-  })  : assert(title != null),
-        super(key: key);
+  }) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -78,7 +77,7 @@ class BackdropSubHeader extends StatelessWidget {
         FadeTransition(
           opacity: Tween(begin: 1.0, end: 0.0)
               .animate(Backdrop.of(context).animationController),
-          child: Icon(Icons.keyboard_arrow_up),
+          child: const Icon(Icons.keyboard_arrow_up),
         );
 
     return Column(
diff --git a/pubspec.yaml b/pubspec.yaml
index cfde47c..a187a00 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,14 +4,6 @@ version: 0.6.2
 homepage: https://github.com/fluttercommunity/backdrop
 documentation: https://github.com/fluttercommunity/backdrop
 maintainer: Harsh Bhikadia (@daadu)
-authors:
-  - Flutter Community <community@flutter.zone>
-  - Harsh Bhikadia <harsh.bhikadiya@gmail.com>
-  - Felix Wielander <felix.wielander@gmail.com>
-  - Daniel Borges <https://github.com/danielborges93>
-  - Felix Wortmann <https://github.com/felixwortmann>
-  - Scott MacDougall <me@scottmacdougall.ca>
-  - Sachin Dahal <https://github.com/sachin-dahal>
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
@@ -23,8 +15,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  test: any
-  pedantic: ^1.11.0
+  flutter_lints: ^1.0.4
 
 
 # For information on the generic Dart part of this file, see the
diff --git a/test/backdrop_test.dart b/test/backdrop_test.dart
index fef7cff..188141f 100644
--- a/test/backdrop_test.dart
+++ b/test/backdrop_test.dart
@@ -1,6 +1,6 @@
 import 'package:backdrop/backdrop.dart';
 import 'package:flutter/material.dart';
-import 'package:test/test.dart';
+import 'package:flutter_test/flutter_test.dart';
 
 void main() {
   test('write tests here', () {