Merge branch 'main' into dependabot/npm_and_yarn/docs/cross-spawn-7.0.6

docs/docs/api/observable.mdx

@@ -72,6 +72,25 @@ abstract class _Todo with Store {
 }
 ```
 
+:::info Reactive Extensions
+
+You can convert plain `int`, 'double', `bool`, and `String` literals into
+an observable version with the `.obs()` extension method. For example:
+
+```dart
+var name = ''.obs(); // infers ObservableString
+var counter = 0.obs(); // infers ObservableInt
+```
+
+You can toggle an internal value of `Observable<bool>` with `.toggle()`:
+
+```dart
+var lights = true.obs();
+lights.toggle(); // now lights.value is false
+```
+
+:::
+
 ## Readonly
 
 Generally speaking you want two things in your stores: reactive fields and