diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..dc01b9e
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,16 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = crlf
+indent_size = 4
+indent_style = space
+insert_final_newline = false
+max_line_length = 100
+tab_width = 4
+
+[*.dart]
+max_line_length = 120
+
+[*.yaml]
+indent_size = 2
\ No newline at end of file
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index fa47f93..fdd79aa 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,6 +1,6 @@
 name: CI
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build:
@@ -20,6 +20,9 @@ jobs:
       - run: flutter config --enable-web
       - run: flutter pub get
 
+      - name: Project format check
+        run: flutter format -l 120 -n .
+
       - name: Flutter unit test
         run: flutter test --coverage --coverage-path=lcov.info
 
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..c464379
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,15 @@
+{
+    "[dart]": {
+        "editor.formatOnSave": true,
+        "editor.formatOnType": true,
+        "editor.rulers": [
+            80
+        ],
+        "editor.selectionHighlight": false,
+        "editor.suggest.snippetsPreventQuickSuggestions": false,
+        "editor.suggestSelection": "first",
+        "editor.tabCompletion": "onlySnippets",
+        "editor.wordBasedSuggestions": false
+    },
+    "dart.lineLength": 120
+}
\ No newline at end of file
diff --git a/analysis_options.yaml b/analysis_options.yaml
new file mode 100644
index 0000000..a43eb34
--- /dev/null
+++ b/analysis_options.yaml
@@ -0,0 +1,5 @@
+linter:
+  # TODO: add more rules
+  rules:
+    - avoid_empty_else
+    # - lines_longer_than_80_chars # not yet tested
\ No newline at end of file
diff --git a/example/.gitignore b/example/.gitignore
index 8487566..5f6d825 100644
--- a/example/.gitignore
+++ b/example/.gitignore
@@ -27,6 +27,7 @@
 .pub-cache/
 .pub/
 build/
+.flutter-plugins-dependencies
 
 # Android related
 **/android/**/gradle-wrapper.jar
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 494f7b9..4ce912a 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -83,8 +83,7 @@ class _NavigationTiles extends StatelessWidget {
             ListTile(
               title: Text("Star On GitHub"),
               onTap: () {
-                Navigator.of(context).push(
-                    MaterialPageRoute(builder: (context) => PageWithIme()));
+                Navigator.of(context).push(MaterialPageRoute(builder: (context) => PageWithIme()));
               },
             )
           ],
diff --git a/test/overlay_support_test.dart b/test/overlay_support_test.dart
index 217c66c..52dfb32 100644
--- a/test/overlay_support_test.dart
+++ b/test/overlay_support_test.dart
@@ -70,8 +70,7 @@ void main() {
       await tester.pumpWidget(_FakeOverlay(child: Builder(builder: (context) {
         return FlatButton(
             onPressed: () {
-              entry =
-                  showSimpleNotification(Text('message'), autoDismiss: false);
+              entry = showSimpleNotification(Text('message'), autoDismiss: false);
             },
             child: Text('notification'));
       })));
@@ -95,8 +94,7 @@ void main() {
       await tester.pumpWidget(_FakeOverlay(child: Builder(builder: (context) {
         return FlatButton(
             onPressed: () {
-              final entry =
-                  showSimpleNotification(Text('message'), autoDismiss: false);
+              final entry = showSimpleNotification(Text('message'), autoDismiss: false);
               //dismiss immediately
               entry.dismiss();
             },
@@ -163,14 +161,12 @@ void main() {
           children: <Widget>[
             FlatButton(
                 onPressed: () {
-                  showSimpleNotification(Text('message'),
-                      autoDismiss: false, key: ValueKey('hello'));
+                  showSimpleNotification(Text('message'), autoDismiss: false, key: ValueKey('hello'));
                 },
                 child: Text('notification')),
             FlatButton(
                 onPressed: () {
-                  showSimpleNotification(Text('message2'),
-                      autoDismiss: false, key: ValueKey('hello'));
+                  showSimpleNotification(Text('message2'), autoDismiss: false, key: ValueKey('hello'));
                 },
                 child: Text('notification2')),
           ],
@@ -203,14 +199,12 @@ void main() {
           children: <Widget>[
             FlatButton(
                 onPressed: () {
-                  showSimpleNotification(Text('message'),
-                      autoDismiss: false, key: ModalKey('hello'));
+                  showSimpleNotification(Text('message'), autoDismiss: false, key: ModalKey('hello'));
                 },
                 child: Text('notification')),
             FlatButton(
                 onPressed: () {
-                  showSimpleNotification(Text('message2'),
-                      autoDismiss: false, key: ModalKey('hello'));
+                  showSimpleNotification(Text('message2'), autoDismiss: false, key: ModalKey('hello'));
                 },
                 child: Text('notification2')),
           ],
@@ -237,8 +231,7 @@ void main() {
       await tester.pumpWidget(_FakeOverlay(child: Builder(builder: (context) {
         return FlatButton(
             onPressed: () {
-              showSimpleNotification(Text('message'),
-                  trailing: Builder(builder: (context) {
+              showSimpleNotification(Text('message'), trailing: Builder(builder: (context) {
                 return FlatButton(
                   onPressed: () {
                     entry = OverlaySupportEntry.of(context);
@@ -265,8 +258,7 @@ void main() {
       await tester.pumpWidget(_FakeOverlay(child: Builder(builder: (context) {
         return FlatButton(
             onPressed: () {
-              entry =
-                  showSimpleNotification(Text('message'), autoDismiss: true);
+              entry = showSimpleNotification(Text('message'), autoDismiss: true);
             },
             child: Text('notification'));
       })));