diff --git a/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec-generated.mm b/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec-generated.mm
index 16c00ccda57..cbb042ad827 100644
--- a/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec-generated.mm
+++ b/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec-generated.mm
@@ -789,6 +789,10 @@ namespace facebook {
       return static_cast<ObjCTurboModule&>(turboModule).invokeObjCMethod(rt, VoidKind, "reloadWithReason", @selector(reloadWithReason:), args, count);
     }
 
+    static facebook::jsi::Value __hostFunction_NativeDevSettingsSpecJSI_onFastRefresh(facebook::jsi::Runtime& rt, TurboModule &turboModule, const facebook::jsi::Value* args, size_t count) {
+      return static_cast<ObjCTurboModule&>(turboModule).invokeObjCMethod(rt, VoidKind, "onFastRefresh", @selector(onFastRefresh), args, count);
+    }
+
     static facebook::jsi::Value __hostFunction_NativeDevSettingsSpecJSI_setHotLoadingEnabled(facebook::jsi::Runtime& rt, TurboModule &turboModule, const facebook::jsi::Value* args, size_t count) {
       return static_cast<ObjCTurboModule&>(turboModule).invokeObjCMethod(rt, VoidKind, "setHotLoadingEnabled", @selector(setHotLoadingEnabled:), args, count);
     }
@@ -823,6 +827,9 @@ namespace facebook {
         methodMap_["reloadWithReason"] = MethodMetadata {1, __hostFunction_NativeDevSettingsSpecJSI_reloadWithReason};
         
         
+        methodMap_["onFastRefresh"] = MethodMetadata {0, __hostFunction_NativeDevSettingsSpecJSI_onFastRefresh};
+        
+        
         methodMap_["setHotLoadingEnabled"] = MethodMetadata {1, __hostFunction_NativeDevSettingsSpecJSI_setHotLoadingEnabled};
         
         
diff --git a/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec.h b/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec.h
index b8d73129514..1dd003fdd9e 100644
--- a/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec.h
+++ b/Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec.h
@@ -740,6 +740,7 @@ namespace facebook {
 
 - (void)reload;
 - (void)reloadWithReason:(NSString *)reason;
+- (void)onFastRefresh;
 - (void)setHotLoadingEnabled:(BOOL)isHotLoadingEnabled;
 - (void)setIsDebuggingRemotely:(BOOL)isDebuggingRemotelyEnabled;
 - (void)setProfilingEnabled:(BOOL)isProfilingEnabled;
diff --git a/Libraries/NativeModules/specs/NativeDevSettings.js b/Libraries/NativeModules/specs/NativeDevSettings.js
index a09d765501f..a23a2521136 100644
--- a/Libraries/NativeModules/specs/NativeDevSettings.js
+++ b/Libraries/NativeModules/specs/NativeDevSettings.js
@@ -16,6 +16,7 @@ import * as TurboModuleRegistry from '../../TurboModule/TurboModuleRegistry';
 export interface Spec extends TurboModule {
   +reload: () => void;
   +reloadWithReason?: (reason: string) => void;
+  +onFastRefresh?: () => void;
   +setHotLoadingEnabled: (isHotLoadingEnabled: boolean) => void;
   +setIsDebuggingRemotely: (isDebuggingRemotelyEnabled: boolean) => void;
   +setProfilingEnabled: (isProfilingEnabled: boolean) => void;
diff --git a/Libraries/Utilities/DevSettings.js b/Libraries/Utilities/DevSettings.js
index 21b1ab8fd67..42ffec85148 100644
--- a/Libraries/Utilities/DevSettings.js
+++ b/Libraries/Utilities/DevSettings.js
@@ -47,6 +47,12 @@ class DevSettings extends NativeEventEmitter {
     }
   }
 
+  onFastRefresh() {
+    if (typeof NativeDevSettings.onFastRefresh === 'function') {
+      NativeDevSettings.onFastRefresh();
+    }
+  }
+
   // TODO: Add other dev setting methods exposed by the native module.
 }
 
diff --git a/React/Base/RCTBridge.h b/React/Base/RCTBridge.h
index 804b4092f67..338d5d0864b 100644
--- a/React/Base/RCTBridge.h
+++ b/React/Base/RCTBridge.h
@@ -73,6 +73,11 @@ RCT_EXTERN NSString *const RCTDidSetupModuleNotificationSetupTimeKey;
  */
 RCT_EXTERN NSString *const RCTBridgeWillReloadNotification;
 
+/**
+ * This notification fires whenever a fast refresh happens.
+ */
+RCT_EXTERN NSString *const RCTBridgeFastRefreshNotification;
+
 /**
  * This notification fires just before the bridge begins downloading a script
  * from the packager.
@@ -261,6 +266,11 @@ RCT_EXTERN void RCTEnableTurboModule(BOOL enabled);
  */
 - (void)reloadWithReason:(NSString *)reason;
 
+/**
+ * Handle notifications for a fast refresh. Safe to call from any thread.
+ */
+- (void)onFastRefresh;
+
 /**
  * Inform the bridge, and anything subscribing to it, that it should reload.
  */
diff --git a/React/Base/RCTBridge.m b/React/Base/RCTBridge.m
index 04398f884fe..6842c30332c 100644
--- a/React/Base/RCTBridge.m
+++ b/React/Base/RCTBridge.m
@@ -31,6 +31,7 @@ NSString *const RCTDidSetupModuleNotification = @"RCTDidSetupModuleNotification"
 NSString *const RCTDidSetupModuleNotificationModuleNameKey = @"moduleName";
 NSString *const RCTDidSetupModuleNotificationSetupTimeKey = @"setupTime";
 NSString *const RCTBridgeWillReloadNotification = @"RCTBridgeWillReloadNotification";
+NSString *const RCTBridgeFastRefreshNotification = @"RCTBridgeFastRefreshNotification";
 NSString *const RCTBridgeWillDownloadScriptNotification = @"RCTBridgeWillDownloadScriptNotification";
 NSString *const RCTBridgeDidDownloadScriptNotification = @"RCTBridgeDidDownloadScriptNotification";
 NSString *const RCTBridgeWillInvalidateModulesNotification = @"RCTBridgeWillInvalidateModulesNotification";
@@ -320,6 +321,11 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init)
   });
 }
 
+- (void)onFastRefresh
+{
+  [[NSNotificationCenter defaultCenter] postNotificationName:RCTBridgeFastRefreshNotification object:self];
+}
+
 - (void)requestReload
 {
   [self reloadWithReason:@"Requested from bridge"];
diff --git a/React/Modules/RCTDevSettings.mm b/React/Modules/RCTDevSettings.mm
index 32373e036aa..1e8ee126363 100644
--- a/React/Modules/RCTDevSettings.mm
+++ b/React/Modules/RCTDevSettings.mm
@@ -245,6 +245,11 @@ RCT_EXPORT_METHOD(reloadWithReason : (NSString *) reason)
 
 }
 
+RCT_EXPORT_METHOD(onFastRefresh)
+{
+    [self.bridge onFastRefresh];
+}
+
 RCT_EXPORT_METHOD(setIsShakeToShowDevMenuEnabled : (BOOL)enabled)
 {
   [self _updateSettingWithValue:@(enabled) forKey:kRCTDevSettingShakeToShowDevMenu];
diff --git a/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java b/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java
index e6227638ce8..d974d6b963f 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/modules/debug/DevSettingsModule.java
@@ -57,6 +57,11 @@ public class DevSettingsModule extends ReactContextBaseJavaModule {
     this.reload();
   }
 
+  @ReactMethod
+  public void onFastRefresh() {
+    // noop
+  }
+
   @ReactMethod
   public void setHotLoadingEnabled(boolean isHotLoadingEnabled) {
     mDevSupportManager.setHotModuleReplacementEnabled(isHotLoadingEnabled);