use yarn to install local package (remove demo folder manually) for demo; react-native link react-native-webview for demo

demo/android/app/build.gradle

 }
 
 dependencies {
+    implementation project(':react-native-webview')
     implementation fileTree(dir: "libs", include: ["*.jar"])
     implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
     implementation "com.facebook.react:react-native:+"  // From node_modules

demo/android/app/src/main/java/com/demo/MainApplication.java

 import android.app.Application;
 
 import com.facebook.react.ReactApplication;
+import com.reactnativecommunity.webview.RNCWebViewPackage;
 import com.facebook.react.ReactNativeHost;
 import com.facebook.react.ReactPackage;
 import com.facebook.react.shell.MainReactPackage;
     @Override
     protected List<ReactPackage> getPackages() {
       return Arrays.<ReactPackage>asList(
-          new MainReactPackage()
+          new MainReactPackage(),
+            new RNCWebViewPackage()
       );
     }
 

demo/android/settings.gradle

 rootProject.name = 'demo'
+include ':react-native-webview'
+project(':react-native-webview').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-webview/android')
 
 include ':app'

demo/ios/demo.xcodeproj/project.pbxproj

 	};
 	objectVersion = 46;
 	objects = {
-
 /* Begin PBXBuildFile section */
 		00C302E51ABCBA2D00DB3ED1 /* libRCTActionSheet.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 00C302AC1ABCB8CE00DB3ED1 /* libRCTActionSheet.a */; };
 		00C302E71ABCBA2D00DB3ED1 /* libRCTGeolocation.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 00C302BA1ABCB90400DB3ED1 /* libRCTGeolocation.a */; };
 		ADBDB9381DFEBF1600ED6528 /* libRCTBlob.a in Frameworks */ = {isa = PBXBuildFile; fileRef = ADBDB9271DFEBF0700ED6528 /* libRCTBlob.a */; };
 		ED297163215061F000B7C4FE /* JavaScriptCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = ED297162215061F000B7C4FE /* JavaScriptCore.framework */; };
 		ED2971652150620600B7C4FE /* JavaScriptCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = ED2971642150620600B7C4FE /* JavaScriptCore.framework */; };
+		67358EEE45004F09A283C3E3 /* libRNCWebView.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 9F571B03CD384ED4A5C07A73 /* libRNCWebView.a */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
 		ADBDB91F1DFEBF0600ED6528 /* RCTBlob.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTBlob.xcodeproj; path = "../node_modules/react-native/Libraries/Blob/RCTBlob.xcodeproj"; sourceTree = "<group>"; };
 		ED297162215061F000B7C4FE /* JavaScriptCore.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = JavaScriptCore.framework; path = System/Library/Frameworks/JavaScriptCore.framework; sourceTree = SDKROOT; };
 		ED2971642150620600B7C4FE /* JavaScriptCore.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = JavaScriptCore.framework; path = Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS12.0.sdk/System/Library/Frameworks/JavaScriptCore.framework; sourceTree = DEVELOPER_DIR; };
+		97C8BA14ABDD4368BA605616 /* RNCWebView.xcodeproj */ = {isa = PBXFileReference; name = "RNCWebView.xcodeproj"; path = "../node_modules/react-native-webview/ios/RNCWebView.xcodeproj"; sourceTree = "<group>"; fileEncoding = undefined; lastKnownFileType = wrapper.pb-project; explicitFileType = undefined; includeInIndex = 0; };
+		9F571B03CD384ED4A5C07A73 /* libRNCWebView.a */ = {isa = PBXFileReference; name = "libRNCWebView.a"; path = "libRNCWebView.a"; sourceTree = "<group>"; fileEncoding = undefined; lastKnownFileType = archive.ar; explicitFileType = undefined; includeInIndex = 0; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
 				832341BD1AAA6AB300B99B32 /* libRCTText.a in Frameworks */,
 				00C302EA1ABCBA2D00DB3ED1 /* libRCTVibration.a in Frameworks */,
 				139FDEF61B0652A700C62182 /* libRCTWebSocket.a in Frameworks */,
+				67358EEE45004F09A283C3E3 /* libRNCWebView.a in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 				832341B01AAA6A8300B99B32 /* RCTText.xcodeproj */,
 				00C302DF1ABCB9EE00DB3ED1 /* RCTVibration.xcodeproj */,
 				139FDEE61B06529A00C62182 /* RCTWebSocket.xcodeproj */,
+				97C8BA14ABDD4368BA605616 /* RNCWebView.xcodeproj */,
 			);
 			name = Libraries;
 			sourceTree = "<group>";
 		83CBB9F71A601CBA00E9B192 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0940;
+				LastUpgradeCheck = 940;
 				ORGANIZATIONNAME = Facebook;
 				TargetAttributes = {
 					00E356ED1AD99517003FC87E = {
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactjs.native.example.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/demo.app/demo";
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"\"$(SRCROOT)/$(TARGET_NAME)\"",
+				);
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Debug;
 		};
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactjs.native.example.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/demo.app/demo";
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"\"$(SRCROOT)/$(TARGET_NAME)\"",
+				);
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Release;
 		};
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactjs.native.example.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = demo;
 				VERSIONING_SYSTEM = "apple-generic";
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Debug;
 		};
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactjs.native.example.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = demo;
 				VERSIONING_SYSTEM = "apple-generic";
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Release;
 		};
 				SDKROOT = appletvos;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.2;
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"\"$(SRCROOT)/$(TARGET_NAME)\"",
+				);
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Debug;
 		};
 				SDKROOT = appletvos;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.2;
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"\"$(SRCROOT)/$(TARGET_NAME)\"",
+				);
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Release;
 		};
 				SDKROOT = appletvos;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/demo-tvOS.app/demo-tvOS";
 				TVOS_DEPLOYMENT_TARGET = 10.1;
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"\"$(SRCROOT)/$(TARGET_NAME)\"",
+				);
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Debug;
 		};
 				SDKROOT = appletvos;
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/demo-tvOS.app/demo-tvOS";
 				TVOS_DEPLOYMENT_TARGET = 10.1;
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"\"$(SRCROOT)/$(TARGET_NAME)\"",
+				);
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(SRCROOT)/../node_modules/react-native-webview/ios",
+				);
 			};
 			name = Release;
 		};

demo/package.json

   },
   "dependencies": {
     "react": "16.6.3",
-    "react-native": "0.58.3"
+    "react-native": "0.58.3",
+    "react-native-autoheight-webview": "../"
   },
   "devDependencies": {
     "babel-core": "^7.0.0-bridge.0",
   "jest": {
     "preset": "react-native"
   }
-}
+}

demo/yarn.lock

     semver "^5.1.0"
     through2 "^2.0.0"
 
-fbjs@^0.8.9:
+fbjs@^0.8.17, fbjs@^0.8.9:
   version "0.8.17"
   resolved "https://registry.yarnpkg.com/fbjs/-/fbjs-0.8.17.tgz#c4d598ead6949112653d6588b01a5cdcd9f90fdd"
   integrity sha1-xNWY6taUkRJlPWWIsBpc3Nn5D90=
   resolved "https://registry.yarnpkg.com/image-size/-/image-size-0.6.3.tgz#e7e5c65bb534bd7cdcedd6cb5166272a85f75fb2"
   integrity sha512-47xSUiQioGaB96nqtp5/q55m0aBQSQdyIloMOc/x+QVTDZLNmXE892IIDrJ0hM1A5vcNUDD5tDffkSP5lCaIIA==
 
+immutable@^3.8.2:
+  version "3.8.2"
+  resolved "https://registry.yarnpkg.com/immutable/-/immutable-3.8.2.tgz#c2439951455bb39913daf281376f1530e104adf3"
+  integrity sha1-wkOZUUVbs5kT2vKBN28VMOEErfM=
+
 import-fresh@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-2.0.0.tgz#d81355c15612d386c61f9ddd3922d4304822a546"
     loose-envify "^1.3.1"
     object-assign "^4.1.1"
 
+prop-types@^15.7.1:
+  version "15.7.1"
+  resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.7.1.tgz#2fa61e0a699d428b40320127733ee2931f05d9d1"
+  integrity sha512-f8Lku2z9kERjOCcnDOPm68EBJAO2K00Q5mSgPAUE/gJuBgsYLbVy6owSrtcHj90zt8PvW+z0qaIIgsIhHOa1Qw==
+  dependencies:
+    object-assign "^4.1.1"
+    react-is "^16.8.1"
+
 pseudomap@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/pseudomap/-/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.7.0.tgz#c1bd21c64f1f1364c6f70695ec02d69392f41bfa"
   integrity sha512-Z0VRQdF4NPDoI0tsXVMLkJLiwEBa+RP66g0xDHxgxysxSoCUccSten4RTF/UFvZF1dZvZ9Zu1sx+MDXwcOR34g==
 
+react-is@^16.8.1:
+  version "16.8.1"
+  resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.8.1.tgz#a80141e246eb894824fb4f2901c0c50ef31d4cdb"
+  integrity sha512-ioMCzVDWvCvKD8eeT+iukyWrBGrA3DiFYkXfBsVYIRdaREZuBjENG+KjrikavCLasozqRWTwFUagU/O4vPpRMA==
+
+react-native-autoheight-webview@../:
+  version "0.11.0"
+  dependencies:
+    immutable "^3.8.2"
+    prop-types "^15.7.1"
+    react-native-webview "^5.0.7"
+
+react-native-webview@^5.0.7:
+  version "5.0.7"
+  resolved "https://registry.yarnpkg.com/react-native-webview/-/react-native-webview-5.0.7.tgz#1060f7c652d251ea3610eacfc4bd9e9997862f56"
+  integrity sha512-jzYrpxPdHGXc9KW0J6Ec4zOXeDFy8BZQS+nUjCqs/cPSPkQO2H/4e6IXz9Y1DTC4l08H2RQLeWPo9nml69MXmA==
+  dependencies:
+    escape-string-regexp "^1.0.5"
+    fbjs "^0.8.17"
+
 react-native@0.58.3:
   version "0.58.3"
   resolved "https://registry.yarnpkg.com/react-native/-/react-native-0.58.3.tgz#90e2dbfef19f3793ba008ab5274daac926424916"