[docs] Remove outdated bridge and null state references from AppState docs (facebook#4985)

Author: dr-thca

docs/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---
 

website/versioned_docs/version-0.77/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---
 

website/versioned_docs/version-0.78/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---
 

website/versioned_docs/version-0.79/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---
 

website/versioned_docs/version-0.80/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---
 

website/versioned_docs/version-0.81/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---
 

website/versioned_docs/version-0.82/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---
 

website/versioned_docs/version-0.83/appstate.md

@@ -20,7 +20,11 @@ For more information, see [Apple's documentation](https://developer.apple.com/do
 
 ## Basic Usage
 
-To see the current state, you can check `AppState.currentState`, which will be kept up-to-date. However, `currentState` will be null at launch while `AppState` retrieves it over the bridge.
+To see the current state, you can check `AppState.currentState`, which will be kept up-to-date.
+
+:::info
+If you are using the legacy architecture, `currentState` will be `null` at launch until it is retrieved asynchronously from the native side.
+:::
 
 ```SnackPlayer name=AppState%20Example
 import React, {useRef, useState, useEffect} from 'react';
@@ -70,7 +74,7 @@ const styles = StyleSheet.create({
 export default AppStateExample;
 ```
 
-This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state, and the null state will happen only momentarily. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
+This example will only ever appear to say "Current state is: active" because the app is only visible to the user when in the `active` state. If you want to experiment with the code we recommend to use your own device instead of embedded preview.
 
 ---