diff --git a/React/React.xcodeproj/project.pbxproj b/React/React.xcodeproj/project.pbxproj
index 18f194eaf..384de6f67 100644
--- a/React/React.xcodeproj/project.pbxproj
+++ b/React/React.xcodeproj/project.pbxproj
@@ -2046,7 +2046,11 @@
 		3EDCA8A21D3591E700450C31 /* RCTErrorCustomizer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTErrorCustomizer.h; sourceTree = "<group>"; };
 		3EDCA8A31D3591E700450C31 /* RCTErrorInfo.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTErrorInfo.h; sourceTree = "<group>"; };
 		3EDCA8A41D3591E700450C31 /* RCTErrorInfo.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTErrorInfo.m; sourceTree = "<group>"; };
-		4F56C93722167A4800DB9F3F /* jsilib.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = jsilib.h; sourceTree = "<group>"; };
+		4F56C93722167A4800DB9F3F /* jsilib.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = jsi/jsilib.h; sourceTree = "<group>"; };
+		50E98FE621460B0D00CD9289 /* RCTWKWebViewManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTWKWebViewManager.m; sourceTree = "<group>"; };
+		50E98FE721460B0D00CD9289 /* RCTWKWebView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTWKWebView.h; sourceTree = "<group>"; };
+		50E98FE821460B0D00CD9289 /* RCTWKWebView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTWKWebView.m; sourceTree = "<group>"; };
+		50E98FE921460B0D00CD9289 /* RCTWKWebViewManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTWKWebViewManager.h; sourceTree = "<group>"; };
 		5335D5401FE81A4700883D58 /* RCTShadowView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTShadowView.m; sourceTree = "<group>"; };
 		5343895E203905B6008E0CB3 /* YGLayout.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = YGLayout.cpp; sourceTree = "<group>"; };
 		5343895F203905B6008E0CB3 /* YGLayout.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = YGLayout.h; sourceTree = "<group>"; };
@@ -2221,15 +2225,15 @@
 		EDDA711B2164285A00B2D070 /* JSINativeModules.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = JSINativeModules.cpp; path = jsireact/JSINativeModules.cpp; sourceTree = "<group>"; };
 		EDDA711C2164285A00B2D070 /* JSIExecutor.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = JSIExecutor.cpp; path = jsireact/JSIExecutor.cpp; sourceTree = "<group>"; };
 		EDEBC6D6214B3E7000DD5AC8 /* libjsi.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libjsi.a; sourceTree = BUILT_PRODUCTS_DIR; };
-		EDEBC6D9214B3F6800DD5AC8 /* jsi-inl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "jsi-inl.h"; sourceTree = "<group>"; };
-		EDEBC6DA214B3F6800DD5AC8 /* JSIDynamic.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSIDynamic.cpp; sourceTree = "<group>"; };
-		EDEBC6DB214B3F6800DD5AC8 /* jsi.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = jsi.cpp; sourceTree = "<group>"; };
-		EDEBC6DC214B3F6800DD5AC8 /* JSIDynamic.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSIDynamic.h; sourceTree = "<group>"; };
+		EDEBC6D9214B3F6800DD5AC8 /* jsi-inl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = "jsi-inl.h"; path = "jsi/jsi-inl.h"; sourceTree = "<group>"; };
+		EDEBC6DA214B3F6800DD5AC8 /* JSIDynamic.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = JSIDynamic.cpp; path = jsi/JSIDynamic.cpp; sourceTree = "<group>"; };
+		EDEBC6DB214B3F6800DD5AC8 /* jsi.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = jsi.cpp; path = jsi/jsi.cpp; sourceTree = "<group>"; };
+		EDEBC6DC214B3F6800DD5AC8 /* JSIDynamic.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = JSIDynamic.h; path = jsi/JSIDynamic.h; sourceTree = "<group>"; };
 		EDEBC6DD214B3F6800DD5AC8 /* JSCRuntime.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSCRuntime.cpp; sourceTree = "<group>"; };
 		EDEBC6DE214B3F6800DD5AC8 /* JSCRuntime.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSCRuntime.h; sourceTree = "<group>"; };
 		EDEBC6DF214B3F6800DD5AC8 /* BUCK */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = BUCK; sourceTree = "<group>"; };
-		EDEBC6E0214B3F6800DD5AC8 /* instrumentation.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = instrumentation.h; sourceTree = "<group>"; };
-		EDEBC6E1214B3F6800DD5AC8 /* jsi.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = jsi.h; sourceTree = "<group>"; };
+		EDEBC6E0214B3F6800DD5AC8 /* instrumentation.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = instrumentation.h; path = jsi/instrumentation.h; sourceTree = "<group>"; };
+		EDEBC6E1214B3F6800DD5AC8 /* jsi.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = jsi.h; path = jsi/jsi.h; sourceTree = "<group>"; };
 		EDEBC73B214B45A300DD5AC8 /* libjsiexecutor.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libjsiexecutor.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		EDEBC740214B463000DD5AC8 /* BUCK */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = BUCK; sourceTree = "<group>"; };
 		EDEBC750214B47E100DD5AC8 /* JSDeltaBundleClient.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSDeltaBundleClient.cpp; sourceTree = "<group>"; };
@@ -3199,10 +3203,7 @@
 				594F0A331FD23228007FBE96 /* RCTSurfaceHostingView.h in Headers */,
 				130443DD1E401AF500D93A67 /* RCTConvert+Transform.h in Headers */,
 				134D63C41F1FEC65008872B5 /* RCTCxxBridgeDelegate.h in Headers */,
-				3D302F801DF828F800D6DDAE /* RCTNavItem.h in Headers */,
 				1968A2601F67275300EB3D1D /* RCTComponentEvent.h in Headers */,
-				3D302F811DF828F800D6DDAE /* RCTNavItemManager.h in Headers */,
-				135A9C061E7B0F7800587AEB /* RCTJSCHelpers.h in Headers */,
 				3D302F841DF828F800D6DDAE /* RCTPointerEvents.h in Headers */,
 				59EB6DBC1EBD6FC90072A5E7 /* RCTUIManagerObserverCoordinator.h in Headers */,
 				657734941EE8356100A0E9EA /* RCTInspectorPackagerConnection.h in Headers */,
@@ -3932,6 +3933,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 				Base,
 			);
diff --git a/ReactAndroid/src/main/java/com/facebook/react/jscexecutor/Android.mk b/ReactAndroid/src/main/java/com/facebook/react/jscexecutor/Android.mk
index 21642e637..8ec340a60 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/jscexecutor/Android.mk
+++ b/ReactAndroid/src/main/java/com/facebook/react/jscexecutor/Android.mk
@@ -15,7 +15,7 @@ LOCAL_C_INCLUDES := $(LOCAL_PATH)
 
 LOCAL_CFLAGS += -fvisibility=hidden -fexceptions -frtti
 
-LOCAL_STATIC_LIBRARIES := libjsi libjsireact
+LOCAL_STATIC_LIBRARIES := libjsi libjsireact jscruntime
 LOCAL_SHARED_LIBRARIES := libfolly_json libfb libreactnativejni
 
 include $(BUILD_SHARED_LIBRARY)
diff --git a/ReactCommon/cxxreact/Android.mk b/ReactCommon/cxxreact/Android.mk
index cd234d418..e0bee78c3 100644
--- a/ReactCommon/cxxreact/Android.mk
+++ b/ReactCommon/cxxreact/Android.mk
@@ -19,7 +19,7 @@ LOCAL_CFLAGS := \
 
 LOCAL_CFLAGS += -fexceptions -frtti -Wno-unused-lambda-capture
 
-LOCAL_STATIC_LIBRARIES := boost
+LOCAL_STATIC_LIBRARIES := boost jsi
 LOCAL_SHARED_LIBRARIES := jsinspector libfolly_json glog
 
 include $(BUILD_STATIC_LIBRARY)
@@ -28,4 +28,5 @@ $(call import-module,fb)
 $(call import-module,folly)
 $(call import-module,jsc)
 $(call import-module,glog)
+$(call import-module,jsi)
 $(call import-module,jsinspector)
diff --git a/ReactCommon/jsi/Android.mk b/ReactCommon/jsi/Android.mk
index 4e650d9ca..d6a547cc4 100644
--- a/ReactCommon/jsi/Android.mk
+++ b/ReactCommon/jsi/Android.mk
@@ -9,10 +9,25 @@ include $(CLEAR_VARS)
 
 LOCAL_MODULE := jsi
 
+LOCAL_SRC_FILES := $(wildcard $(LOCAL_PATH)/jsi/*.cpp)
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
+
+LOCAL_CFLAGS := -fexceptions -frtti -O3
+LOCAL_SHARED_LIBRARIES := libfolly_json glog
+
+include $(BUILD_STATIC_LIBRARY)
+
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := jscruntime
+
 LOCAL_SRC_FILES := $(wildcard $(LOCAL_PATH)/*.cpp)
 
-LOCAL_C_INCLUDES += $(LOCAL_PATH)/..
-LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
+LOCAL_C_INCLUDES := $(LOCAL_PATH)
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
 
 LOCAL_CFLAGS := -fexceptions -frtti -O3
 LOCAL_SHARED_LIBRARIES := libfolly_json libjsc glog
diff --git a/ReactCommon/jsi/BUCK b/ReactCommon/jsi/BUCK
index b36813dac..3e9aa991c 100644
--- a/ReactCommon/jsi/BUCK
+++ b/ReactCommon/jsi/BUCK
@@ -5,14 +5,14 @@ load("//tools/build_defs/oss:rn_defs.bzl", "react_native_xplat_dep", "rn_xplat_c
 rn_xplat_cxx_library(
     name = "jsi",
     srcs = [
-        "jsi.cpp",
+        "jsi/jsi.cpp",
     ],
-    header_namespace = "jsi",
+    header_namespace = "",
     exported_headers = [
-        "instrumentation.h",
-        "jsi.h",
-        "jsi-inl.h",
-        "jsilib.h",
+        "jsi/instrumentation.h",
+        "jsi/jsi.h",
+        "jsi/jsi-inl.h",
+        "jsi/jsilib.h",
     ],
     compiler_flags = [
         "-O3",
@@ -40,11 +40,11 @@ rn_xplat_cxx_library(
 rn_xplat_cxx_library(
     name = "JSIDynamic",
     srcs = [
-        "JSIDynamic.cpp",
+        "jsi/JSIDynamic.cpp",
     ],
-    header_namespace = "jsi",
+    header_namespace = "",
     exported_headers = [
-        "JSIDynamic.h",
+        "jsi/JSIDynamic.h",
     ],
     compiler_flags = [
         "-fexceptions",
diff --git a/ReactCommon/jsi/JSIDynamic.cpp b/ReactCommon/jsi/jsi/JSIDynamic.cpp
similarity index 100%
rename from ReactCommon/jsi/JSIDynamic.cpp
rename to ReactCommon/jsi/jsi/JSIDynamic.cpp
diff --git a/ReactCommon/jsi/JSIDynamic.h b/ReactCommon/jsi/jsi/JSIDynamic.h
similarity index 100%
rename from ReactCommon/jsi/JSIDynamic.h
rename to ReactCommon/jsi/jsi/JSIDynamic.h
diff --git a/ReactCommon/jsi/instrumentation.h b/ReactCommon/jsi/jsi/instrumentation.h
similarity index 100%
rename from ReactCommon/jsi/instrumentation.h
rename to ReactCommon/jsi/jsi/instrumentation.h
diff --git a/ReactCommon/jsi/jsi-inl.h b/ReactCommon/jsi/jsi/jsi-inl.h
similarity index 100%
rename from ReactCommon/jsi/jsi-inl.h
rename to ReactCommon/jsi/jsi/jsi-inl.h
diff --git a/ReactCommon/jsi/jsi.cpp b/ReactCommon/jsi/jsi/jsi.cpp
similarity index 100%
rename from ReactCommon/jsi/jsi.cpp
rename to ReactCommon/jsi/jsi/jsi.cpp
diff --git a/ReactCommon/jsi/jsi.h b/ReactCommon/jsi/jsi/jsi.h
similarity index 100%
rename from ReactCommon/jsi/jsi.h
rename to ReactCommon/jsi/jsi/jsi.h
diff --git a/ReactCommon/jsi/jsilib.h b/ReactCommon/jsi/jsi/jsilib.h
similarity index 100%
rename from ReactCommon/jsi/jsilib.h
rename to ReactCommon/jsi/jsi/jsilib.h