Merge branch 'master' into docs/nav-state-changes

README.md

 
 **React Native WebView** is a modern, well-supported, and cross-platform WebView for React Native. It is intended to be a replacement for the built-in WebView (which will be [removed from core](https://github.com/react-native-community/discussions-and-proposals/pull/3)).
 
+> We just swapped out the React Native WebView in our app with the version from React Native Community. The swap took less than a day, required almost no code modifications, and is faster and CSS works better. Props to everyone in the community (including those at Infinite Red) that helped get that component split out.
+
+_Garrett McCullough, mobile engineer at Virta Health_
+
 ## Platforms Supported
 
 - [x] iOS (both UIWebView and WKWebView)

android/build.gradle

 buildscript {
-    ext.kotlin_version = '1.2.71'
-    repositories {
-        google()
-        jcenter()
-        maven {
-            url 'https://maven.fabric.io/public'
-        }
-    }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
+  ext.kotlin_version = '1.2.71'
+  repositories {
+    google()
+    jcenter()
+  }
+  dependencies {
+    classpath 'com.android.tools.build:gradle:3.2.1'
+    //noinspection DifferentKotlinGradleVersion
+    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+  }
 }
 
 apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
-
+def DEFAULT_TARGET_SDK_VERSION = 27
 def DEFAULT_COMPILE_SDK_VERSION = 27
 def DEFAULT_BUILD_TOOLS_VERSION = "28.0.3"
-def DEFAULT_TARGET_SDK_VERSION = 27
+
+def getExtOrDefault(name, defaultValue) {
+  return rootProject.ext.has(name) ? rootProject.ext.get(name) : defaultValue
+}
 
 android {
-    compileSdkVersion rootProject.hasProperty('compileSdkVersion') ? rootProject.compileSdkVersion : DEFAULT_COMPILE_SDK_VERSION
-    buildToolsVersion rootProject.hasProperty('buildToolsVersion') ? rootProject.buildToolsVersion : DEFAULT_BUILD_TOOLS_VERSION
-    defaultConfig {
-        minSdkVersion 16
-        targetSdkVersion rootProject.hasProperty('targetSdkVersion') ? rootProject.targetSdkVersion : DEFAULT_TARGET_SDK_VERSION
-        versionCode 1
-        versionName "1.0"
-    }
-    buildTypes {
-        release {
-            minifyEnabled false
-        }
-    }
-    productFlavors {
-    }
-    lintOptions {
-        disable 'GradleCompatible'
-    }
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+  compileSdkVersion getExtOrDefault('compileSdkVersion', DEFAULT_COMPILE_SDK_VERSION)
+  buildToolsVersion getExtOrDefault('buildToolsVersion', DEFAULT_BUILD_TOOLS_VERSION)
+  defaultConfig {
+    minSdkVersion 16
+    targetSdkVersion getExtOrDefault('targetSdkVersion', DEFAULT_TARGET_SDK_VERSION)
+    versionCode 1
+    versionName "1.0"
+  }
+  buildTypes {
+    release {
+      minifyEnabled false
     }
+  }
+  lintOptions {
+    disable 'GradleCompatible'
+  }
+  compileOptions {
+    sourceCompatibility JavaVersion.VERSION_1_8
+    targetCompatibility JavaVersion.VERSION_1_8
+  }
 }
 
 repositories {
-    mavenCentral()
+  mavenCentral()
+  jcenter()
+
+  def found = false
+  def defaultDir = null
+  def androidSourcesName = 'React Native sources'
+
+  if (rootProject.ext.has('reactNativeAndroidRoot')) {
+    defaultDir = rootProject.ext.get('reactNativeAndroidRoot')
+  } else {
+    defaultDir = new File(
+      projectDir,
+      '/../../../node_modules/react-native/android'
+    )
+  }
+
+  if (defaultDir.exists()) {
     maven {
-        url 'https://maven.google.com/'
-        name 'Google'
+      url defaultDir.toString()
+      name androidSourcesName
     }
 
-    // Stolen from react-native-firebase, thanks dudes!
-    def found = false
+    logger.quiet(":${project.name}:reactNativeAndroidRoot ${defaultDir.canonicalPath}")
+    found = true
+  } else {
     def parentDir = rootProject.projectDir
-    def reactNativeAndroidName = 'React Native (Node Modules)'
-
-    1.upto(4, {
-        if (found) return true
-        parentDir = parentDir.parentFile
-        def reactNativeAndroid = new File(
-                parentDir,
-                'node_modules/react-native/android'
-        )
-
-        if (reactNativeAndroid.exists()) {
-            maven {
-                url reactNativeAndroid.toString()
-                name reactNativeAndroidName
-            }
-
-            println "${project.name}: using React Native sources from ${reactNativeAndroid.toString()}"
-            found = true
+
+    1.upto(5, {
+      if (found) return true
+      parentDir = parentDir.parentFile
+
+      def androidSourcesDir = new File(
+        parentDir,
+        'node_modules/react-native'
+      )
+
+      def androidPrebuiltBinaryDir = new File(
+        parentDir,
+        'node_modules/react-native/android'
+      )
+
+      if (androidPrebuiltBinaryDir.exists()) {
+        maven {
+          url androidPrebuiltBinaryDir.toString()
+          name androidSourcesName
+        }
+
+        logger.quiet(":${project.name}:reactNativeAndroidRoot ${androidPrebuiltBinaryDir.canonicalPath}")
+        found = true
+      } else if (androidSourcesDir.exists()) {
+        maven {
+          url androidSourcesDir.toString()
+          name androidSourcesName
         }
+
+        logger.quiet(":${project.name}:reactNativeAndroidRoot ${androidSourcesDir.canonicalPath}")
+        found = true
+      }
     })
+  }
 
-    if (!found) {
-        throw new GradleException(
-                "${project.name}: unable to locate React Native Android sources, " +
-                        "ensure you have you installed React Native as a dependency and try again."
-        )
-    }
+  if (!found) {
+    throw new GradleException(
+      "${project.name}: unable to locate React Native android sources. " +
+        "Ensure you have you installed React Native as a dependency in your project and try again."
+    )
+  }
 }
 
 dependencies {
-    implementation 'com.facebook.react:react-native:+'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+  //noinspection GradleDynamicVersion
+  api 'com.facebook.react:react-native:+'
+  implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 }

android/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.reactnativecommunity.webview">
-</manifest>
+    <application>
+        <provider
+        android:name=".RNCWebViewFileProvider"
+        android:authorities="${applicationId}.fileprovider"
+        android:exported="false"
+        android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_provider_paths" />
+        </provider>
+    </application>
+</manifest>

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewFileProvider.java

+package com.reactnativecommunity.webview;
+
+import android.support.v4.content.FileProvider;
+
+/**
+ * Providing a custom {@code FileProvider} prevents manifest {@code <provider>} name collisions.
+ *
+ * See https://developer.android.com/guide/topics/manifest/provider-element.html for details.
+ */
+public class RNCWebViewFileProvider extends FileProvider {
+
+  // This class intentionally left blank.
+
+}

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewManager.java

 package com.reactnativecommunity.webview;
 
 import android.annotation.TargetApi;
+import android.app.DownloadManager;
 import android.content.Context;
 import com.facebook.react.uimanager.UIManagerModule;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLDecoder;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.regex.Pattern;
 import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.graphics.Bitmap;
-import android.graphics.Picture;
 import android.net.Uri;
 import android.os.Build;
+import android.os.Environment;
 import android.text.TextUtils;
 import android.view.View;
 import android.view.ViewGroup.LayoutParams;
 import android.webkit.ConsoleMessage;
 import android.webkit.CookieManager;
+import android.webkit.DownloadListener;
 import android.webkit.GeolocationPermissions;
 import android.webkit.JavascriptInterface;
+import android.webkit.URLUtil;
 import android.webkit.ValueCallback;
 import android.webkit.WebChromeClient;
+import android.webkit.WebResourceRequest;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
+
 import com.facebook.common.logging.FLog;
 import com.facebook.react.bridge.Arguments;
 import com.facebook.react.bridge.LifecycleEventListener;
 import com.facebook.react.uimanager.events.ContentSizeChangeEvent;
 import com.facebook.react.uimanager.events.Event;
 import com.facebook.react.uimanager.events.EventDispatcher;
+import com.facebook.react.uimanager.events.RCTEventEmitter;
 import com.reactnativecommunity.webview.events.TopLoadingErrorEvent;
 import com.reactnativecommunity.webview.events.TopLoadingFinishEvent;
 import com.reactnativecommunity.webview.events.TopLoadingStartEvent;
 import com.reactnativecommunity.webview.events.TopMessageEvent;
 import com.reactnativecommunity.webview.events.TopLoadingProgressEvent;
+import com.reactnativecommunity.webview.events.TopShouldStartLoadWithRequestEvent;
+import java.io.UnsupportedEncodingException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import javax.annotation.Nullable;
 import org.json.JSONException;
 import org.json.JSONObject;
 
  *  - GO_BACK
  *  - GO_FORWARD
  *  - RELOAD
+ *  - LOAD_URL
  *
  * {@link WebView} instances could emit following direct events:
  *  - topLoadingFinish
  *  - topLoadingStart
  *  - topLoadingStart
  *  - topLoadingProgress
+ *  - topShouldStartLoadWithRequest
  *
  * Each event will carry the following properties:
  *  - target - view's react tag
 public class RNCWebViewManager extends SimpleViewManager<WebView> {
 
   protected static final String REACT_CLASS = "RNCWebView";
+  private RNCWebViewPackage aPackage;
 
   protected static final String HTML_ENCODING = "UTF-8";
   protected static final String HTML_MIME_TYPE = "text/html";
   public static final int COMMAND_STOP_LOADING = 4;
   public static final int COMMAND_POST_MESSAGE = 5;
   public static final int COMMAND_INJECT_JAVASCRIPT = 6;
+  public static final int COMMAND_LOAD_URL = 7;
 
   // Use `webView.loadUrl("about:blank")` to reliably reset the view
   // state and release page resources (including any running JavaScript).
   protected static final String BLANK_URL = "about:blank";
 
   protected WebViewConfig mWebViewConfig;
-  protected @Nullable WebView.PictureListener mPictureListener;
 
   protected static class RNCWebViewClient extends WebViewClient {
 
     protected boolean mLastLoadFailed = false;
     protected @Nullable ReadableArray mUrlPrefixesForDefaultIntent;
-    protected @Nullable List<Pattern> mOriginWhitelist;
 
     @Override
     public void onPageFinished(WebView webView, String url) {
 
     @Override
     public boolean shouldOverrideUrlLoading(WebView view, String url) {
-      if (url.equals(BLANK_URL)) return false;
-
-      // url blacklisting
-      if (mUrlPrefixesForDefaultIntent != null && mUrlPrefixesForDefaultIntent.size() > 0) {
-        ArrayList<Object> urlPrefixesForDefaultIntent =
-            mUrlPrefixesForDefaultIntent.toArrayList();
-        for (Object urlPrefix : urlPrefixesForDefaultIntent) {
-          if (url.startsWith((String) urlPrefix)) {
-            launchIntent(view.getContext(), url);
-            return true;
-          }
-        }
-      }
-
-      if (mOriginWhitelist != null && shouldHandleURL(mOriginWhitelist, url)) {
-        return false;
-      }
-
-      launchIntent(view.getContext(), url);
+      dispatchEvent(view, new TopShouldStartLoadWithRequestEvent(view.getId(), url));
       return true;
     }
 
-    private void launchIntent(Context context, String url) {
-      try {
-        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
-        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-        intent.addCategory(Intent.CATEGORY_BROWSABLE);
-        context.startActivity(intent);
-      } catch (ActivityNotFoundException e) {
-        FLog.w(ReactConstants.TAG, "activity not found to handle uri scheme for: " + url, e);
-      }
-    }
 
-    private boolean shouldHandleURL(List<Pattern> originWhitelist, String url) {
-      Uri uri = Uri.parse(url);
-      String scheme = uri.getScheme() != null ? uri.getScheme() : "";
-      String authority = uri.getAuthority() != null ? uri.getAuthority() : "";
-      String urlToCheck = scheme + "://" + authority;
-      for (Pattern pattern : originWhitelist) {
-        if (pattern.matcher(urlToCheck).matches()) {
-          return true;
-        }
-      }
-      return false;
+    @TargetApi(Build.VERSION_CODES.N)
+    @Override
+    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
+      dispatchEvent(view, new TopShouldStartLoadWithRequestEvent(view.getId(), request.getUrl().toString()));
+      return true;
     }
 
     @Override
     public void setUrlPrefixesForDefaultIntent(ReadableArray specialUrls) {
       mUrlPrefixesForDefaultIntent = specialUrls;
     }
-
-    public void setOriginWhitelist(List<Pattern> originWhitelist) {
-      mOriginWhitelist = originWhitelist;
-    }
   }
 
   /**
     protected @Nullable String injectedJS;
     protected boolean messagingEnabled = false;
     protected @Nullable RNCWebViewClient mRNCWebViewClient;
+    protected boolean sendContentSizeChangeEvents = false;
+    public void setSendContentSizeChangeEvents(boolean sendContentSizeChangeEvents) {
+      this.sendContentSizeChangeEvents = sendContentSizeChangeEvents;
+    }
+
 
     protected class RNCWebViewBridge {
       RNCWebView mContext;
       cleanupCallbacksAndDestroy();
     }
 
+    @Override
+    protected void onSizeChanged(int w, int h, int ow, int oh) {
+      super.onSizeChanged(w, h, ow, oh);
+
+      if (sendContentSizeChangeEvents) {
+        dispatchEvent(
+          this,
+          new ContentSizeChangeEvent(
+            this.getId(),
+            w,
+            h
+          )
+        );
+      }
+    }
+
     @Override
     public void setWebViewClient(WebViewClient client) {
       super.setWebViewClient(client);
       public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
         callback.invoke(origin, true, false);
       }
+
+      protected void openFileChooser(ValueCallback<Uri> filePathCallback, String acceptType) {
+        getModule().startPhotoPickerIntent(filePathCallback, acceptType);
+      }
+      protected void openFileChooser(ValueCallback<Uri> filePathCallback) {
+        getModule().startPhotoPickerIntent(filePathCallback, "");
+      }
+      protected void openFileChooser(ValueCallback<Uri> filePathCallback, String acceptType, String capture) {
+        getModule().startPhotoPickerIntent(filePathCallback, acceptType);
+      }
+
+      @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+      @Override
+      public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
+        String[] acceptTypes = fileChooserParams.getAcceptTypes();
+        boolean allowMultiple = fileChooserParams.getMode() == WebChromeClient.FileChooserParams.MODE_OPEN_MULTIPLE;
+        Intent intent = fileChooserParams.createIntent();
+        return getModule().startPhotoPickerIntent(filePathCallback, intent, acceptTypes, allowMultiple);
+      }
     });
     reactContext.addLifecycleEventListener(webView);
     mWebViewConfig.configWebView(webView);
       WebView.setWebContentsDebuggingEnabled(true);
     }
 
+    webView.setDownloadListener(new DownloadListener() {
+      public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
+        RNCWebViewModule module = getModule();
+
+        DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
+
+        //Try to extract filename from contentDisposition, otherwise guess using URLUtil
+        String fileName = "";
+        try {
+          fileName = contentDisposition.replaceFirst("(?i)^.*filename=\"?([^\"]+)\"?.*$", "$1");
+          fileName = URLDecoder.decode(fileName, "UTF-8");
+        } catch (Exception e) {
+          System.out.println("Error extracting filename from contentDisposition: " + e);
+          System.out.println("Falling back to URLUtil.guessFileName");
+          fileName = URLUtil.guessFileName(url,contentDisposition,mimetype);
+        }
+        String downloadMessage = "Downloading " + fileName;
+
+        //Attempt to add cookie, if it exists
+        URL urlObj = null;
+        try {
+          urlObj = new URL(url);
+          String baseUrl = urlObj.getProtocol() + "://" + urlObj.getHost();
+          String cookie = CookieManager.getInstance().getCookie(baseUrl);
+          request.addRequestHeader("Cookie", cookie);
+          System.out.println("Got cookie for DownloadManager: " + cookie);
+        } catch (MalformedURLException e) {
+          System.out.println("Error getting cookie for DownloadManager: " + e.toString());
+          e.printStackTrace();
+        }
+
+        //Finish setting up request
+        request.addRequestHeader("User-Agent", userAgent);
+        request.setTitle(fileName);
+        request.setDescription(downloadMessage);
+        request.allowScanningByMediaScanner();
+        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
+
+        module.setDownloadRequest(request);
+
+        if (module.grantFileDownloaderPermissions()) {
+          module.downloadFile();
+        }
+      }
+    });
+
     return webView;
   }
 
 
   @ReactProp(name = "onContentSizeChange")
   public void setOnContentSizeChange(WebView view, boolean sendContentSizeChangeEvents) {
-    if (sendContentSizeChangeEvents) {
-      view.setPictureListener(getPictureListener());
-    } else {
-      view.setPictureListener(null);
-    }
+    ((RNCWebView) view).setSendContentSizeChangeEvents(sendContentSizeChangeEvents);
   }
 
   @ReactProp(name = "mixedContentMode")
     view.getSettings().setGeolocationEnabled(isGeolocationEnabled != null && isGeolocationEnabled);
   }
 
-  @ReactProp(name = "originWhitelist")
-  public void setOriginWhitelist(
-    WebView view,
-    @Nullable ReadableArray originWhitelist) {
-    RNCWebViewClient client = ((RNCWebView) view).getRNCWebViewClient();
-    if (client != null && originWhitelist != null) {
-      List<Pattern> whiteList = new LinkedList<>();
-      for (int i = 0 ; i < originWhitelist.size() ; i++) {
-        whiteList.add(Pattern.compile(originWhitelist.getString(i)));
-      }
-      client.setOriginWhitelist(whiteList);
-    }
-  }
-
   @Override
   protected void addEventEmitters(ThemedReactContext reactContext, WebView view) {
     // Do not register default touch emitter and let WebView implementation handle touches
 
   @Override
   public Map getExportedCustomDirectEventTypeConstants() {
-    MapBuilder.Builder builder = MapBuilder.builder();
-    builder.put("topLoadingProgress", MapBuilder.of("registrationName", "onLoadingProgress"));
-    return builder.build();
+    Map export = super.getExportedCustomDirectEventTypeConstants();
+    if (export == null) {
+      export = MapBuilder.newHashMap();
+    }
+    export.put(TopLoadingProgressEvent.EVENT_NAME, MapBuilder.of("registrationName", "onLoadingProgress"));
+    export.put(TopShouldStartLoadWithRequestEvent.EVENT_NAME, MapBuilder.of("registrationName", "onShouldStartLoadWithRequest"));
+    return export;
   }
 
   @Override
         "reload", COMMAND_RELOAD,
         "stopLoading", COMMAND_STOP_LOADING,
         "postMessage", COMMAND_POST_MESSAGE,
-        "injectJavaScript", COMMAND_INJECT_JAVASCRIPT
+        "injectJavaScript", COMMAND_INJECT_JAVASCRIPT,
+        "loadUrl", COMMAND_LOAD_URL
       );
   }
 
         RNCWebView reactWebView = (RNCWebView) root;
         reactWebView.evaluateJavascriptWithFallback(args.getString(0));
         break;
+      case COMMAND_LOAD_URL:
+        if (args == null) {
+          throw new RuntimeException("Arguments for loading an url are null!");
+        }
+        root.loadUrl(args.getString(0));
+        break;
     }
   }
 
     ((RNCWebView) webView).cleanupCallbacksAndDestroy();
   }
 
-  protected WebView.PictureListener getPictureListener() {
-    if (mPictureListener == null) {
-      mPictureListener = new WebView.PictureListener() {
-        @Override
-        public void onNewPicture(WebView webView, Picture picture) {
-          dispatchEvent(
-            webView,
-            new ContentSizeChangeEvent(
-              webView.getId(),
-              webView.getWidth(),
-              webView.getContentHeight()));
-        }
-      };
-    }
-    return mPictureListener;
-  }
-
   protected static void dispatchEvent(WebView webView, Event event) {
     ReactContext reactContext = (ReactContext) webView.getContext();
     EventDispatcher eventDispatcher =
       reactContext.getNativeModule(UIManagerModule.class).getEventDispatcher();
     eventDispatcher.dispatchEvent(event);
   }
+
+  public RNCWebViewPackage getPackage() {
+    return this.aPackage;
+  }
+
+  public void setPackage(RNCWebViewPackage aPackage) {
+    this.aPackage = aPackage;
+  }
+
+  public RNCWebViewModule getModule() {
+    return this.aPackage.getModule();
+  }
 }

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewModule.java

 
 package com.reactnativecommunity.webview;
 
+import android.Manifest;
+import android.app.Activity;
+import android.app.DownloadManager;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Environment;
+import android.os.Parcelable;
+import android.provider.MediaStore;
+import android.support.annotation.RequiresApi;
+import android.support.v4.content.ContextCompat;
+import android.support.v4.content.FileProvider;
+import android.util.Log;
+import android.webkit.ValueCallback;
+import android.webkit.WebChromeClient;
+import android.widget.Toast;
+
+import com.facebook.react.bridge.ActivityEventListener;
+import com.facebook.react.bridge.Promise;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
 import com.facebook.react.bridge.ReactMethod;
-import com.facebook.react.bridge.Callback;
+import com.facebook.react.modules.core.PermissionAwareActivity;
+import com.facebook.react.modules.core.PermissionListener;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+
+import static android.app.Activity.RESULT_OK;
 
-public class RNCWebViewModule extends ReactContextBaseJavaModule {
+public class RNCWebViewModule extends ReactContextBaseJavaModule implements ActivityEventListener {
 
   private final ReactApplicationContext reactContext;
+  private RNCWebViewPackage aPackage;
+
+  private static final int PICKER = 1;
+  private static final int PICKER_LEGACY = 3;
+
+  private ValueCallback<Uri> filePathCallbackLegacy;
+  private ValueCallback<Uri[]> filePathCallback;
+  private Uri outputFileUri;
+
+  private DownloadManager.Request downloadRequest;
+  private static final int FILE_DOWNLOAD_PERMISSION_REQUEST = 1;
+
+  final String DEFAULT_MIME_TYPES = "*/*";
 
   public RNCWebViewModule(ReactApplicationContext reactContext) {
     super(reactContext);
     this.reactContext = reactContext;
+    reactContext.addActivityEventListener(this);
   }
 
   @Override
   public String getName() {
     return "RNCWebView";
   }
-}
+
+  @ReactMethod
+  public void isFileUploadSupported(final Promise promise) {
+      Boolean result = false;
+      int current = Build.VERSION.SDK_INT;
+      if (current >= Build.VERSION_CODES.LOLLIPOP) {
+          result = true;
+      }
+      if (current >= Build.VERSION_CODES.JELLY_BEAN && current <= Build.VERSION_CODES.JELLY_BEAN_MR2) {
+          result = true;
+      }
+      promise.resolve(result);
+  }
+
+  public void onActivityResult(Activity activity, int requestCode, int resultCode, Intent data) {
+
+    if (filePathCallback == null && filePathCallbackLegacy == null) {
+        return;
+    }
+
+    // based off of which button was pressed, we get an activity result and a file
+    // the camera activity doesn't properly return the filename* (I think?) so we use
+    // this filename instead
+    switch (requestCode) {
+    case PICKER:
+        if (resultCode != RESULT_OK) {
+            if (filePathCallback != null) {
+                filePathCallback.onReceiveValue(null);
+            }
+        } else {
+            Uri result[] = this.getSelectedFiles(data, resultCode);
+            if (result != null) {
+                filePathCallback.onReceiveValue(result);
+            } else {
+                filePathCallback.onReceiveValue(new Uri[] { outputFileUri });
+            }
+        }
+        break;
+    case PICKER_LEGACY:
+        Uri result = resultCode != Activity.RESULT_OK ? null : data == null ? outputFileUri : data.getData();
+        filePathCallbackLegacy.onReceiveValue(result);
+        break;
+
+    }
+    filePathCallback = null;
+    filePathCallbackLegacy= null;
+    outputFileUri = null;
+  }
+
+  public void onNewIntent(Intent intent) {
+  }
+
+  private Uri[] getSelectedFiles(Intent data, int resultCode) {
+    if (data == null) {
+        return null;
+    }
+
+    // we have one file selected
+    if (data.getData() != null) {
+        if (resultCode == RESULT_OK && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            return WebChromeClient.FileChooserParams.parseResult(resultCode, data);
+        } else {
+            return null;
+        }
+    }
+
+    // we have multiple files selected
+    if (data.getClipData() != null) {
+        final int numSelectedFiles = data.getClipData().getItemCount();
+        Uri[] result = new Uri[numSelectedFiles];
+        for (int i = 0; i < numSelectedFiles; i++) {
+            result[i] = data.getClipData().getItemAt(i).getUri();
+        }
+        return result;
+    }
+    return null;
+  }
+
+  public void startPhotoPickerIntent(ValueCallback<Uri> filePathCallback, String acceptType) {
+      filePathCallbackLegacy = filePathCallback;
+
+      Intent fileChooserIntent = getFileChooserIntent(acceptType);
+      Intent chooserIntent = Intent.createChooser(fileChooserIntent, "");
+
+      ArrayList<Parcelable> extraIntents = new ArrayList<>();
+      if (acceptsImages(acceptType)) {
+          extraIntents.add(getPhotoIntent());
+      }
+      if (acceptsVideo(acceptType)) {
+          extraIntents.add(getVideoIntent());
+      }
+      chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, extraIntents.toArray(new Parcelable[]{}));
+
+      if (chooserIntent.resolveActivity(getCurrentActivity().getPackageManager()) != null) {
+          getCurrentActivity().startActivityForResult(chooserIntent, PICKER_LEGACY);
+      } else {
+          Log.w("RNCWebViewModule", "there is no Activity to handle this Intent");
+      }
+  }
+
+  @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+  public boolean startPhotoPickerIntent(final ValueCallback<Uri[]> callback, final Intent intent, final String[] acceptTypes, final boolean allowMultiple) {
+    filePathCallback = callback;
+
+    ArrayList<Parcelable> extraIntents = new ArrayList<>();
+    if (acceptsImages(acceptTypes)) {
+      extraIntents.add(getPhotoIntent());
+    }
+    if (acceptsVideo(acceptTypes)) {
+      extraIntents.add(getVideoIntent());
+    }
+
+    Intent fileSelectionIntent = getFileChooserIntent(acceptTypes, allowMultiple);
+
+    Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
+    chooserIntent.putExtra(Intent.EXTRA_INTENT, fileSelectionIntent);
+    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, extraIntents.toArray(new Parcelable[]{}));
+
+    if (chooserIntent.resolveActivity(getCurrentActivity().getPackageManager()) != null) {
+        getCurrentActivity().startActivityForResult(chooserIntent, PICKER);
+    } else {
+        Log.w("RNCWebViewModule", "there is no Activity to handle this Intent");
+    }
+
+    return true;
+  }
+
+  public void setDownloadRequest(DownloadManager.Request request) {
+    this.downloadRequest = request;
+  }
+
+  public void downloadFile() {
+    DownloadManager dm = (DownloadManager) getCurrentActivity().getBaseContext().getSystemService(Context.DOWNLOAD_SERVICE);
+    String downloadMessage = "Downloading";
+
+    dm.enqueue(this.downloadRequest);
+
+    Toast.makeText(getCurrentActivity().getApplicationContext(), downloadMessage, Toast.LENGTH_LONG).show();
+  }
+
+  public boolean grantFileDownloaderPermissions() {
+    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+      return true;
+    }
+
+    boolean result = true;
+    if (ContextCompat.checkSelfPermission(getCurrentActivity(), Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
+      result = false;
+    }
+
+    if (!result) {
+      PermissionAwareActivity activity = getPermissionAwareActivity();
+      activity.requestPermissions(new String[]{ Manifest.permission.WRITE_EXTERNAL_STORAGE }, FILE_DOWNLOAD_PERMISSION_REQUEST, webviewFileDownloaderPermissionListener);
+    }
+
+    return result;
+  }
+
+  public RNCWebViewPackage getPackage() {
+    return this.aPackage;
+  }
+
+  public void setPackage(RNCWebViewPackage aPackage) {
+    this.aPackage = aPackage;
+  }
+
+  private Intent getPhotoIntent() {
+    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
+    outputFileUri = getOutputUri(MediaStore.ACTION_IMAGE_CAPTURE);
+    intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
+    return intent;
+  }
+
+  private Intent getVideoIntent() {
+    Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
+    // @todo from experience, for Videos we get the data onActivityResult
+    // so there's no need to store the Uri
+    Uri outputVideoUri = getOutputUri(MediaStore.ACTION_VIDEO_CAPTURE);
+    intent.putExtra(MediaStore.EXTRA_OUTPUT, outputVideoUri);
+    return intent;
+  }
+
+  private Intent getFileChooserIntent(String acceptTypes) {
+    String _acceptTypes = acceptTypes;
+    if (acceptTypes.isEmpty()) {
+      _acceptTypes = DEFAULT_MIME_TYPES;
+    }
+    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+    intent.addCategory(Intent.CATEGORY_OPENABLE);
+    intent.setType(_acceptTypes);
+    return intent;
+  }
+
+  private Intent getFileChooserIntent(String[] acceptTypes, boolean allowMultiple) {
+    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+    intent.addCategory(Intent.CATEGORY_OPENABLE);
+    intent.setType("*/*");
+    intent.putExtra(Intent.EXTRA_MIME_TYPES, getAcceptedMimeType(acceptTypes));
+    intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, allowMultiple);
+    return intent;
+  }
+
+  private Boolean acceptsImages(String types) {
+    return types.isEmpty() || types.toLowerCase().contains("image");
+  }
+  private Boolean acceptsImages(String[] types) {
+    return isArrayEmpty(types) || arrayContainsString(types, "image");
+  }
+
+  private Boolean acceptsVideo(String types) {
+    return types.isEmpty() || types.toLowerCase().contains("video");
+  }
+  private Boolean acceptsVideo(String[] types) {
+    return isArrayEmpty(types) || arrayContainsString(types, "video");
+  }
+
+  private Boolean arrayContainsString(String[] array, String pattern){
+    for(String content : array){
+        if(content.contains(pattern)){
+            return true;
+        }
+    }
+    return false;
+  }
+
+  private String[] getAcceptedMimeType(String[] types) {
+    if (isArrayEmpty(types)) {
+        return new String[]{DEFAULT_MIME_TYPES};
+    }
+    return types;
+  }
+
+  private Uri getOutputUri(String intentType) {
+    File capturedFile = null;
+    try {
+        capturedFile = getCapturedFile(intentType);
+    } catch (IOException e) {
+        Log.e("CREATE FILE", "Error occurred while creating the File", e);
+        e.printStackTrace();
+    }
+
+    // for versions below 6.0 (23) we use the old File creation & permissions model
+    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+        return Uri.fromFile(capturedFile);
+    }
+
+    // for versions 6.0+ (23) we use the FileProvider to avoid runtime permissions
+    String packageName = getReactApplicationContext().getPackageName();
+    return FileProvider.getUriForFile(getReactApplicationContext(), packageName+".fileprovider", capturedFile);
+  }
+
+  private File getCapturedFile(String intentType) throws IOException {
+    String prefix = "";
+    String suffix = "";
+    String dir = "";
+    String filename = "";
+
+    if (intentType.equals(MediaStore.ACTION_IMAGE_CAPTURE)) {
+      prefix = "image-";
+      suffix = ".jpg";
+      dir = Environment.DIRECTORY_PICTURES;
+    } else if (intentType.equals(MediaStore.ACTION_VIDEO_CAPTURE)) {
+      prefix = "video-";
+      suffix = ".mp4";
+      dir = Environment.DIRECTORY_MOVIES;
+    }
+
+    filename = prefix + String.valueOf(System.currentTimeMillis()) + suffix;
+
+    // for versions below 6.0 (23) we use the old File creation & permissions model
+    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+        // only this Directory works on all tested Android versions
+        // ctx.getExternalFilesDir(dir) was failing on Android 5.0 (sdk 21)
+        File storageDir = Environment.getExternalStoragePublicDirectory(dir);
+        return new File(storageDir, filename);
+    }
+
+    File storageDir = getReactApplicationContext().getExternalFilesDir(null);
+    return File.createTempFile(filename, suffix, storageDir);
+  }
+
+  private Boolean isArrayEmpty(String[] arr) {
+    // when our array returned from getAcceptTypes() has no values set from the webview
+    // i.e. <input type="file" />, without any "accept" attr
+    // will be an array with one empty string element, afaik
+    return arr.length == 0 || (arr.length == 1 && arr[0].length() == 0);
+  }
+
+  private PermissionAwareActivity getPermissionAwareActivity() {
+    Activity activity = getCurrentActivity();
+    if (activity == null) {
+        throw new IllegalStateException("Tried to use permissions API while not attached to an Activity.");
+    } else if (!(activity instanceof PermissionAwareActivity)) {
+        throw new IllegalStateException("Tried to use permissions API but the host Activity doesn't implement PermissionAwareActivity.");
+    }
+    return (PermissionAwareActivity) activity;
+  }
+
+  private PermissionListener webviewFileDownloaderPermissionListener = new PermissionListener() {
+    @Override
+    public boolean onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+      switch (requestCode) {
+        case FILE_DOWNLOAD_PERMISSION_REQUEST: {
+          // If request is cancelled, the result arrays are empty.
+          if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+            if (downloadRequest != null) {
+              downloadFile();
+            }
+          } else {
+            Toast.makeText(getCurrentActivity().getApplicationContext(), "Cannot download files as permission was denied. Please provide permission to write to storage, in order to download files.", Toast.LENGTH_LONG).show();
+          }
+          return true;
+        }
+      }
+      return false;
+    }
+  };
+}

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewPackage.java

 
 package com.reactnativecommunity.webview;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.uimanager.ViewManager;
 import com.facebook.react.bridge.JavaScriptModule;
+
 public class RNCWebViewPackage implements ReactPackage {
+
+    private RNCWebViewManager manager;
+    private RNCWebViewModule module;
+
     @Override
     public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
-      return Arrays.<NativeModule>asList(new RNCWebViewModule(reactContext));
+      List<NativeModule> modulesList = new ArrayList<>();
+      module = new RNCWebViewModule(reactContext);
+      module.setPackage(this);
+      modulesList.add(module);
+      return modulesList;
     }
 
     // Deprecated from RN 0.47
 
     @Override
     public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
-        RNCWebViewManager viewManager = new RNCWebViewManager();
-        return Arrays.<ViewManager>asList(viewManager);
+      manager = new RNCWebViewManager();
+      manager.setPackage(this);
+      return Arrays.<ViewManager>asList(manager);
+    }
+
+    public RNCWebViewModule getModule() {
+      return module;
     }
-}
+}

android/src/main/java/com/reactnativecommunity/webview/events/TopShouldStartLoadWithRequestEvent.java

+package com.reactnativecommunity.webview.events;
+
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.WritableMap;
+import com.facebook.react.uimanager.events.Event;
+import com.facebook.react.uimanager.events.RCTEventEmitter;
+
+public class TopShouldStartLoadWithRequestEvent extends Event<TopMessageEvent> {
+    public static final String EVENT_NAME = "topShouldStartLoadWithRequest";
+    private final String mUrl;
+
+    public TopShouldStartLoadWithRequestEvent(int viewId, String url) {
+        super(viewId);
+        mUrl = url;
+    }
+
+    @Override
+    public String getEventName() {
+        return EVENT_NAME;
+    }
+
+    @Override
+    public boolean canCoalesce() {
+        return false;
+    }
+
+    @Override
+    public short getCoalescingKey() {
+        // All events for a given view can be coalesced.
+        return 0;
+    }
+
+    @Override
+    public void dispatch(RCTEventEmitter rctEventEmitter) {
+        WritableMap data = Arguments.createMap();
+        data.putString("url", mUrl);
+        data.putString("navigationType", "other");
+        rctEventEmitter.receiveEvent(getViewTag(), EVENT_NAME, data);
+    }
+}

android/src/main/res/xml/file_provider_paths.xml

+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-path name="shared" path="." />
+</paths>

docs/Guide.md

 }
 ```
 
+### Add support for File Upload
+
+##### iOS
+
+For iOS, all you need to do is specify the permissions in your `ios/[project]/Info.plist` file:
+
+Photo capture:
+```
+<key>NSCameraUsageDescription</key>
+<string>Take pictures for certain activities</string>
+```
+
+Gallery selection:
+```
+<key>NSPhotoLibraryUsageDescription</key>
+<string>Select pictures for certain activities</string>
+```
+
+Video recording:
+```
+<key>NSMicrophoneUsageDescription</key>
+<string>Need microphone access for recording videos</string>
+```
+
+##### Android
+
+Add permission in AndroidManifest.xml:
+```xml
+<manifest ...>
+  ......
+
+  <!-- this is required only for Android 4.1-5.1 (api 16-22)  -->
+  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+  ......
+</manifest>
+```
+
+##### Check for File Upload support, with `static isFileUploadSupported()`
+
+File Upload using `<input type="file" />` is not supported for Android 4.4 KitKat (see [details](https://github.com/delight-im/Android-AdvancedWebView/issues/4#issuecomment-70372146)):
+
+```
+import { WebView } from "react-native-webview";
+
+WebView.isFileUploadSupported().then(res => {
+  if (res === true) {
+    // file upload is supported
+  } else {
+    // not file upload support
+  }
+});
+
+```
+
+### Add support for File Download
+
+##### iOS
+
+For iOS, all you need to do is specify the permissions in your `ios/[project]/Info.plist` file:
+
+Save to gallery:
+```
+<key>NSPhotoLibraryAddUsageDescription</key>
+<string>Save pictures for certain activities.</string>
+```
+
+##### Android
+
+Add permission in AndroidManifest.xml:
+```xml
+<manifest ...>
+  ......
+
+  <!-- this is required to save files on Android  -->
+  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+  ......
+</manifest>
+```

docs/Reference.md

 - [`html`](Reference.md#html)
 - [`hideKeyboardAccessoryView`](Reference.md#hidekeyboardaccessoryview)
 - [`allowsBackForwardNavigationGestures`](Reference.md#allowsbackforwardnavigationgestures)
+- [`incognito`](Reference.md#incognito)
 - [`allowFileAccess`](Reference.md#allowFileAccess)
 - [`saveFormDataDisabled`](Reference.md#saveFormDataDisabled)
+- [`pagingEnabled`](Reference.md#pagingEnabled)
+- [`allowsLinkPreview`](Reference.md#allowsLinkPreview)
 
 ## Methods Index
 
 
 ### `injectedJavaScript`
 
-Set this to provide JavaScript that will be injected into the web page when the view loads.
+Set this to provide JavaScript that will be injected into the web page when the view loads. Make sure the string evaluates to a valid type (`true` works) and doesn't otherwise throw an exception.
 
 | Type   | Required |
 | ------ | -------- |
 
 ---
 
+### `style`
+
+A style object that allow you to customize the `WebView` style. Please not that there are default styles (example: you need to add `flex: 0` to the style if you want to use `height` property).
+
+| Type  | Required |
+| ----- | -------- |
+| style | No       |
+
+---
+
 ### `decelerationRate`
 
 A floating-point number that determines how quickly the scroll view decelerates after the user lifts their finger. You may also use the string shortcuts `"normal"` and `"fast"` which match the underlying iOS settings for `UIScrollViewDecelerationRateNormal` and `UIScrollViewDecelerationRateFast` respectively:
 
 ---
 
+### `incognito`
+
+Does not store any data within the lifetime of the WebView.
+
+| Type    | Required | Platform      |
+| ------- | -------- | ------------- |
+| boolean | No       | iOS WKWebView |
+
+---
+
 ### `allowFileAccess`
 
 If true, this will allow access to the file system via `file://` URI's. The default value is `false`.
 | ------- | -------- | -------- |
 | boolean | No       | Android  |
 
+---
+
+### `pagingEnabled`
+
+If the value of this property is true, the scroll view stops on multiples of the scroll view’s bounds when the user scrolls. The default value is false.
+
+| Type    | Required | Platform |
+| ------- | -------- | -------- |
+| boolean | No       | iOS      |
+
+---
+
+### `allowsLinkPreview`
+
+A Boolean value that determines whether pressing on a link displays a preview of the destination for the link. In iOS this property is available on devices that support 3D Touch. In iOS 10 and later, the default value is true; before that, the default value is false.
+
+| Type    | Required | Platform |
+| ------- | -------- | -------- |
+| boolean | No       | iOS      |
+
 ## Methods
 
 ### `extraNativeComponentConfig()`

ios/RNCWKProcessPoolManager.h

+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <WebKit/WebKit.h>
+
+@interface RNCWKProcessPoolManager : NSObject
+
++ (instancetype) sharedManager;
+- (WKProcessPool *)sharedProcessPool;
+
+@end

ios/RNCWKProcessPoolManager.m

+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <Foundation/Foundation.h>
+#import "RNCWKProcessPoolManager.h"
+
+@interface RNCWKProcessPoolManager() {
+    WKProcessPool *_sharedProcessPool;
+}
+@end
+
+@implementation RNCWKProcessPoolManager
+
++ (id) sharedManager {
+    static RNCWKProcessPoolManager *_sharedManager = nil;
+    @synchronized(self) {
+        if(_sharedManager == nil) {
+            _sharedManager = [[super alloc] init];
+        }
+        return _sharedManager;
+    }
+}
+
+- (WKProcessPool *)sharedProcessPool {
+    if (!_sharedProcessPool) {
+        _sharedProcessPool = [[WKProcessPool alloc] init];
+    }
+    return _sharedProcessPool;
+}
+
+@end
+

ios/RNCWKWebView.h

 @protocol RNCWKWebViewDelegate <NSObject>
 
 - (BOOL)webView:(RNCWKWebView *)webView
-shouldStartLoadForRequest:(NSMutableDictionary<NSString *, id> *)request
+   shouldStartLoadForRequest:(NSMutableDictionary<NSString *, id> *)request
    withCallback:(RCTDirectEventBlock)callback;
 
 @end
 @property (nonatomic, assign) BOOL messagingEnabled;
 @property (nonatomic, copy) NSString *injectedJavaScript;
 @property (nonatomic, assign) BOOL scrollEnabled;
+@property (nonatomic, assign) BOOL pagingEnabled;
 @property (nonatomic, assign) CGFloat decelerationRate;
 @property (nonatomic, assign) BOOL allowsInlineMediaPlayback;
 @property (nonatomic, assign) BOOL bounces;
 @property (nonatomic, assign) BOOL automaticallyAdjustContentInsets;
 @property (nonatomic, assign) BOOL hideKeyboardAccessoryView;
 @property (nonatomic, assign) BOOL allowsBackForwardNavigationGestures;
+@property (nonatomic, assign) BOOL incognito;
+@property (nonatomic, assign) BOOL useSharedProcessPool;
 @property (nonatomic, copy) NSString *userAgent;
+@property (nonatomic, assign) BOOL allowsLinkPreview;
 
 - (void)postMessage:(NSString *)message;
 - (void)injectJavaScript:(NSString *)script;

ios/RNCWKWebView.m

 #import "RNCWKWebView.h"
 #import <React/RCTConvert.h>
 #import <React/RCTAutoInsetsProtocol.h>
+#import "RNCWKProcessPoolManager.h"
+#import <UIKit/UIKit.h>
 
 #import "objc/runtime.h"
 
-static NSTimer *keyboardTimer;
 static NSString *const MessageHanderName = @"ReactNative";
 
 // runtime trick to remove WKWebView keyboard default toolbar
   BOOL _savedHideKeyboardAccessoryView;
 }
 
-- (void)dealloc
-{
-    if(_webView){
-        [_webView removeObserver:self forKeyPath:@"estimatedProgress"];
-    }
-}
+- (void)dealloc{}
 
 /**
  * See https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/DisplayWebContent/Tasks/WebKitAvail.html.
   return _webkitAvailable;
 }
 
-
 - (instancetype)initWithFrame:(CGRect)frame
 {
   if ((self = [super initWithFrame:frame])) {
     _automaticallyAdjustContentInsets = YES;
     _contentInset = UIEdgeInsetsZero;
   }
-    
-  // Workaround for a keyboard dismissal bug present in iOS 12
-  // https://openradar.appspot.com/radar?id=5018321736957952
-  if (@available(iOS 12.0, *)) {
-    [[NSNotificationCenter defaultCenter]
-      addObserver:self
-      selector:@selector(keyboardWillHide)
-      name:UIKeyboardWillHideNotification object:nil];
-    [[NSNotificationCenter defaultCenter]
-      addObserver:self
-      selector:@selector(keyboardWillShow)
-      name:UIKeyboardWillShowNotification object:nil];
-  }
   return self;
 }
 
     };
 
     WKWebViewConfiguration *wkWebViewConfig = [WKWebViewConfiguration new];
+    if (_incognito) {
+      wkWebViewConfig.websiteDataStore = [WKWebsiteDataStore nonPersistentDataStore];
+    }
+    if(self.useSharedProcessPool) {
+        wkWebViewConfig.processPool = [[RNCWKProcessPoolManager sharedManager] sharedProcessPool];
+    }
     wkWebViewConfig.userContentController = [WKUserContentController new];
     [wkWebViewConfig.userContentController addScriptMessageHandler: self name: MessageHanderName];
     wkWebViewConfig.allowsInlineMediaPlayback = _allowsInlineMediaPlayback;
     _webView.UIDelegate = self;
     _webView.navigationDelegate = self;
     _webView.scrollView.scrollEnabled = _scrollEnabled;
+    _webView.scrollView.pagingEnabled = _pagingEnabled;
     _webView.scrollView.bounces = _bounces;
+    _webView.allowsLinkPreview = _allowsLinkPreview;
     [_webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];
     _webView.allowsBackForwardNavigationGestures = _allowsBackForwardNavigationGestures;
+
     if (_userAgent) {
       _webView.customUserAgent = _userAgent;
     }
     [self addSubview:_webView];
     [self setHideKeyboardAccessoryView: _savedHideKeyboardAccessoryView];
     [self visitSource];
-  } else {
-    [_webView.configuration.userContentController removeScriptMessageHandlerForName:MessageHanderName];
   }
 }
 
--(void)keyboardWillHide
+- (void)removeFromSuperview
 {
-    keyboardTimer = [NSTimer scheduledTimerWithTimeInterval:0 target:self selector:@selector(keyboardDisplacementFix) userInfo:nil repeats:false];
-    [[NSRunLoop mainRunLoop] addTimer:keyboardTimer forMode:NSRunLoopCommonModes];
-}
--(void)keyboardWillShow
-{
-    if (keyboardTimer != nil) {
-        [keyboardTimer invalidate];
+    if (_webView) {
+        [_webView.configuration.userContentController removeScriptMessageHandlerForName:MessageHanderName];
+        [_webView removeObserver:self forKeyPath:@"estimatedProgress"];
+        [_webView removeFromSuperview];
+        _webView = nil;
     }
-}
--(void)keyboardDisplacementFix
-{
-    // https://stackoverflow.com/a/9637807/824966
-    [UIView animateWithDuration:.25 animations:^{
-        self.webView.scrollView.contentOffset = CGPointMake(0, 0);
-    }];
+
+    [super removeFromSuperview];
 }
 
 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{
 
 #pragma mark - WKNavigationDelegate methods
 
+/**
+* alert
+*/
+- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler
+{
+    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:message preferredStyle:UIAlertControllerStyleAlert];
+    [alert addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
+        completionHandler();
+    }]];
+    [[self topViewController] presentViewController:alert animated:YES completion:NULL];
+
+}
+
+/**
+* confirm
+*/
+- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
+    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:message preferredStyle:UIAlertControllerStyleAlert];
+    [alert addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
+        completionHandler(YES);
+    }]];
+    [alert addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
+        completionHandler(NO);
+    }]];
+    [[self topViewController] presentViewController:alert animated:YES completion:NULL];
+}
+
+/**
+* prompt
+*/
+- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString *))completionHandler{
+    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:prompt preferredStyle:UIAlertControllerStyleAlert];
+    [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
+        textField.textColor = [UIColor lightGrayColor];
+        textField.placeholder = defaultText;
+    }];
+    [alert addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
+        completionHandler([[alert.textFields lastObject] text]);
+    }]];
+    [[self topViewController] presentViewController:alert animated:YES completion:NULL];
+}
+
+/**
+ * topViewController
+ */
+-(UIViewController *)topViewController{
+   UIViewController *controller = [self topViewControllerWithRootViewController:[self getCurrentWindow].rootViewController];
+   return controller;
+}
+
+/**
+ * topViewControllerWithRootViewController
+ */
+-(UIViewController *)topViewControllerWithRootViewController:(UIViewController *)viewController{
+  if (viewController==nil) return nil;
+  if (viewController.presentedViewController!=nil) {
+    return [self topViewControllerWithRootViewController:viewController.presentedViewController];
+  } else if ([viewController isKindOfClass:[UITabBarController class]]){
+    return [self topViewControllerWithRootViewController:[(UITabBarController *)viewController selectedViewController]];
+  } else if ([viewController isKindOfClass:[UINavigationController class]]){
+    return [self topViewControllerWithRootViewController:[(UINavigationController *)viewController visibleViewController]];
+  } else {
+    return viewController;
+  }
+}
+/**
+ * getCurrentWindow
+ */
+-(UIWindow *)getCurrentWindow{
+  UIWindow *window = [UIApplication sharedApplication].keyWindow;
+  if (window.windowLevel!=UIWindowLevelNormal) {
+    for (UIWindow *wid in [UIApplication sharedApplication].windows) {
+      if (window.windowLevel==UIWindowLevelNormal) {
+        window = wid;
+        break;
+      }
+    }
+  }
+  return window;
+}
+
+
 /**
  * Decides whether to allow or cancel a navigation.
  * @see https://fburl.com/42r9fxob
       return;
     }
 
+    if ([error.domain isEqualToString:@"WebKitErrorDomain"] && error.code == 102) {
+      // Error code 102 "Frame load interrupted" is raised by the WKWebView
+      // when the URL is from an http redirect. This is a common pattern when
+      // implementing OAuth with a WebView.
+      return;
+    }
+
     NSMutableDictionary<NSString *, id> *event = [self baseEvent];
     [event addEntriesFromDictionary:@{
       @"didFailProvisionalNavigation": @YES,
           thenCall: (void (^)(NSString*)) callback
 {
   [self.webView evaluateJavaScript: js completionHandler: ^(id result, NSError *error) {
-    if (error == nil && callback != nil) {
-      callback([NSString stringWithFormat:@"%@", result]);
+    if (error == nil) {
+      if (callback != nil) {
+        callback([NSString stringWithFormat:@"%@", result]);
+      }
+    } else {
+      RCTLogError(@"Error evaluating injectedJavaScript: This is possibly due to an unsupported return type. Try adding true to the end of your injectedJavaScript string.");
     }
   }];
 }

ios/RNCWKWebViewManager.m

 RCT_EXPORT_VIEW_PROPERTY(automaticallyAdjustContentInsets, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(hideKeyboardAccessoryView, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(allowsBackForwardNavigationGestures, BOOL)
+RCT_EXPORT_VIEW_PROPERTY(incognito, BOOL)
+RCT_EXPORT_VIEW_PROPERTY(pagingEnabled, BOOL)
 RCT_EXPORT_VIEW_PROPERTY(userAgent, NSString)
+RCT_EXPORT_VIEW_PROPERTY(allowsLinkPreview, BOOL)
 
 /**
  * Expose methods to enable messaging the webview.
   view.bounces = json == nil ? true : [RCTConvert BOOL: json];
 }
 
+RCT_CUSTOM_VIEW_PROPERTY(useSharedProcessPool, BOOL, RNCWKWebView) {
+  view.useSharedProcessPool = json == nil ? true : [RCTConvert BOOL: json];
+}
+
 RCT_CUSTOM_VIEW_PROPERTY(scrollEnabled, BOOL, RNCWKWebView) {
   view.scrollEnabled = json == nil ? true : [RCTConvert BOOL: json];
 }

ios/RNCWebView.xcodeproj/project.pbxproj

 	objects = {
 
 /* Begin PBXBuildFile section */
+		3515965E21A3C86000623BFA /* RNCWKProcessPoolManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 3515965D21A3C86000623BFA /* RNCWKProcessPoolManager.m */; };
 		E914DBF6214474710071092B /* RNCUIWebViewManager.m in Sources */ = {isa = PBXBuildFile; fileRef = E914DBF3214474710071092B /* RNCUIWebViewManager.m */; };
 		E914DBF7214474710071092B /* RNCUIWebView.m in Sources */ = {isa = PBXBuildFile; fileRef = E914DBF4214474710071092B /* RNCUIWebView.m */; };
 		E91B351D21446E6C00F9801F /* RNCWKWebViewManager.m in Sources */ = {isa = PBXBuildFile; fileRef = E91B351B21446E6C00F9801F /* RNCWKWebViewManager.m */; };
 
 /* Begin PBXFileReference section */
 		134814201AA4EA6300B7C361 /* libRNCWebView.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libRNCWebView.a; sourceTree = BUILT_PRODUCTS_DIR; };
+		3515965D21A3C86000623BFA /* RNCWKProcessPoolManager.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = RNCWKProcessPoolManager.m; sourceTree = "<group>"; };
+		3515965F21A3C87E00623BFA /* RNCWKProcessPoolManager.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = RNCWKProcessPoolManager.h; sourceTree = "<group>"; };
 		E914DBF2214474710071092B /* RNCUIWebView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RNCUIWebView.h; sourceTree = "<group>"; };
 		E914DBF3214474710071092B /* RNCUIWebViewManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RNCUIWebViewManager.m; sourceTree = "<group>"; };
 		E914DBF4214474710071092B /* RNCUIWebView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RNCUIWebView.m; sourceTree = "<group>"; };
 				E91B351C21446E6C00F9801F /* RNCWKWebView.m */,
 				E91B351921446E6C00F9801F /* RNCWKWebViewManager.h */,
 				E91B351B21446E6C00F9801F /* RNCWKWebViewManager.m */,
+				3515965D21A3C86000623BFA /* RNCWKProcessPoolManager.m */,
+				3515965F21A3C87E00623BFA /* RNCWKProcessPoolManager.h */,
 				134814211AA4EA7D00B7C361 /* Products */,
 			);
 			sourceTree = "<group>";
 				E914DBF7214474710071092B /* RNCUIWebView.m in Sources */,
 				E914DBF6214474710071092B /* RNCUIWebViewManager.m in Sources */,
 				E91B351E21446E6C00F9801F /* RNCWKWebView.m in Sources */,
+				3515965E21A3C86000623BFA /* RNCWKProcessPoolManager.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

js/WebView.android.js

  * @flow
  */
 
-'use strict';
-
 import React from 'react';
 
-import ReactNative from 'react-native';
-import {
+import ReactNative, {
   ActivityIndicator,
+  Image,
+  requireNativeComponent,
   StyleSheet,
   UIManager,
   View,
-  Image,
-  requireNativeComponent
+  NativeModules
 } from 'react-native';
 
 import invariant from 'fbjs/lib/invariant';
 import keyMirror from 'fbjs/lib/keyMirror';
 
-import WebViewShared from './WebViewShared';
+import {
+  defaultOriginWhitelist,
+  createOnShouldStartLoadWithRequest,
+} from './WebViewShared';
 import type {
-  WebViewEvent,
   WebViewError,
   WebViewErrorEvent,
   WebViewMessageEvent,
-  WebViewNavigation,
   WebViewNavigationEvent,
+  WebViewProgressEvent,
   WebViewSharedProps,
   WebViewSource,
-  WebViewProgressEvent,
 } from './WebViewTypes';
 
 const resolveAssetSource = Image.resolveAssetSource;
     scalesPageToFit: true,
     allowFileAccess: false,
     saveFormDataDisabled: false,
-    originWhitelist: WebViewShared.defaultOriginWhitelist,
+    originWhitelist: defaultOriginWhitelist,
   };
 
+  static isFileUploadSupported = async () => {
+    // native implementation should return "true" only for Android 5+
+    return NativeModules.RNCWebView.isFileUploadSupported();
+  }
+
   state = {
-    viewState: this.props.startInLoadingState ? WebViewState.LOADING : WebViewState.IDLE,
+    viewState: this.props.startInLoadingState
+      ? WebViewState.LOADING
+      : WebViewState.IDLE,
     lastErrorEvent: null,
   };
 
 
     const nativeConfig = this.props.nativeConfig || {};
 
-    const originWhitelist = (this.props.originWhitelist || []).map(
-      WebViewShared.originWhitelistToRegex,
-    );
-
     let NativeWebView = nativeConfig.component || RNCWebView;
 
+    const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
+      this.onShouldStartLoadWithRequestCallback,
+      this.props.originWhitelist,
+      this.props.onShouldStartLoadWithRequest,
+    );
+
     const webView = (
       <NativeWebView
         ref={this.webViewRef}
         automaticallyAdjustContentInsets={
           this.props.automaticallyAdjustContentInsets
         }
+        onShouldStartLoadWithRequest={onShouldStartLoadWithRequest}
         onContentSizeChange={this.props.onContentSizeChange}
         onLoadingStart={this.onLoadingStart}
         onLoadingFinish={this.onLoadingFinish}
         allowUniversalAccessFromFileURLs={
           this.props.allowUniversalAccessFromFileURLs
         }
-        originWhitelist={originWhitelist}
         mixedContentMode={this.props.mixedContentMode}
         saveFormDataDisabled={this.props.saveFormDataDisabled}
         urlPrefixesForDefaultIntent={this.props.urlPrefixesForDefaultIntent}
     const { onMessage } = this.props;
     onMessage && onMessage(event);
   };
-  
+
   onLoadingProgress = (event: WebViewProgressEvent) => {
-    const { onLoadProgress} = this.props;
+    const { onLoadProgress } = this.props;
     onLoadProgress && onLoadProgress(event);
-  }
+  };
+
+  onShouldStartLoadWithRequestCallback = (
+    shouldStart: boolean,
+    url: string,
+  ) => {
+    if (shouldStart) {
+      UIManager.dispatchViewManagerCommand(
+        this.getWebViewHandle(),
+        UIManager.RNCWebView.Commands.loadUrl,
+        [String(url)],
+      );
+    }
+  };
 }
 
 const RNCWebView = requireNativeComponent('RNCWebView');

js/WebView.ios.js

 import invariant from 'fbjs/lib/invariant';
 import keyMirror from 'fbjs/lib/keyMirror';
 
-import WebViewShared from './WebViewShared';
+import {
+  defaultOriginWhitelist,
+  createOnShouldStartLoadWithRequest,
+} from './WebViewShared';
 import type {
   WebViewEvent,
   WebViewError,
 
   static defaultProps = {
     useWebKit: true,
-    originWhitelist: WebViewShared.defaultOriginWhitelist,
+    originWhitelist: defaultOriginWhitelist,
+    useSharedProcessPool: true,
   };
 
+  static isFileUploadSupported = async () => {
+    // no native implementation for iOS, depends only on permissions
+    return true;
+  }
+
   state = {
     viewState: this.props.startInLoadingState
       ? WebViewState.LOADING
         'The allowsBackForwardNavigationGestures property is not supported when useWebKit = false',
       );
     }
+
+    if (
+      !this.props.useWebKit &&
+      this.props.incognito
+    ) {
+      console.warn(
+        'The incognito property is not supported when useWebKit = false',
+      );
+    }
   }
 
   render() {
 
     const nativeConfig = this.props.nativeConfig || {};
 
-    let viewManager = nativeConfig.viewManager;
-
-    if (this.props.useWebKit) {
-      viewManager = viewManager || RNCWKWebViewManager;
-    } else {
-      viewManager = viewManager || RNCUIWebViewManager;
-    }
-
-    const compiledWhitelist = [
-      'about:blank',
-      ...(this.props.originWhitelist || []),
-    ].map(WebViewShared.originWhitelistToRegex);
-    const onShouldStartLoadWithRequest = event => {
-      let shouldStart = true;
-      const { url } = event.nativeEvent;
-      const origin = WebViewShared.extractOrigin(url);
-      const passesWhitelist = compiledWhitelist.some(x =>
-        new RegExp(x).test(origin),
-      );
-      shouldStart = shouldStart && passesWhitelist;
-      if (!passesWhitelist) {
-        Linking.openURL(url);
-      }
-      if (this.props.onShouldStartLoadWithRequest) {
-        shouldStart =
-          shouldStart &&
-          this.props.onShouldStartLoadWithRequest(event.nativeEvent);
-      }
-      invariant(viewManager != null, 'viewManager expected to be non-null');
-      viewManager.startLoadWithResult(
-        !!shouldStart,
-        event.nativeEvent.lockIdentifier,
-      );
-    };
+    const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
+      this.onShouldStartLoadWithRequestCallback,
+      this.props.originWhitelist,
+      this.props.onShouldStartLoadWithRequest,
+    );
 
     const decelerationRate = processDecelerationRate(
       this.props.decelerationRate,
         injectedJavaScript={this.props.injectedJavaScript}
         bounces={this.props.bounces}
         scrollEnabled={this.props.scrollEnabled}
+        pagingEnabled={this.props.pagingEnabled}
         decelerationRate={decelerationRate}
         contentInset={this.props.contentInset}
         automaticallyAdjustContentInsets={
         }
         hideKeyboardAccessoryView={this.props.hideKeyboardAccessoryView}
         allowsBackForwardNavigationGestures={this.props.allowsBackForwardNavigationGestures}
+        incognito={this.props.incognito}
         userAgent={this.props.userAgent}
         onLoadingStart={this._onLoadingStart}
         onLoadingFinish={this._onLoadingFinish}
           this.props.mediaPlaybackRequiresUserAction
         }
         dataDetectorTypes={this.props.dataDetectorTypes}
+        useSharedProcessPool={this.props.useSharedProcessPool}
+        allowsLinkPreview={this.props.allowsLinkPreview}
         {...nativeConfig.props}
       />
     );
   };
 
   _onLoadingProgress = (event: WebViewProgressEvent) => {
-    const {onLoadProgress} = this.props;
+    const { onLoadProgress } = this.props;
     onLoadProgress && onLoadProgress(event);
-  }
+  };
+
+  onShouldStartLoadWithRequestCallback = (
+    shouldStart: boolean,
+    url: string,
+    lockIdentifier: number,
+  ) => {
+    let viewManager = (this.props.nativeConfig || {}).viewManager;
+
+    if (this.props.useWebKit) {
+      viewManager = viewManager || RNCWKWebViewManager;
+    } else {
+      viewManager = viewManager || RNCUIWebViewManager;
+    }
+    invariant(viewManager != null, 'viewManager expected to be non-null');
+    viewManager.startLoadWithResult(!!shouldStart, lockIdentifier);
+  };
 
   componentDidUpdate(prevProps: WebViewSharedProps) {
     if (!(prevProps.useWebKit && this.props.useWebKit)) {
     }
 
     this._showRedboxOnPropChanges(prevProps, 'allowsInlineMediaPlayback');
+    this._showRedboxOnPropChanges(prevProps, 'incognito');
     this._showRedboxOnPropChanges(prevProps, 'mediaPlaybackRequiresUserAction');
     this._showRedboxOnPropChanges(prevProps, 'dataDetectorTypes');
 

js/WebViewShared.js

  * @flow
  */
 
-'use strict';
-
-const escapeStringRegexp = require('escape-string-regexp');
-
-const WebViewShared = {
-  defaultOriginWhitelist: ['http://*', 'https://*'],
-  extractOrigin: (url: string): string => {
-    const result = /^[A-Za-z0-9]+:(\/\/)?[^/]*/.exec(url);
-    return result === null ? '' : result[0];
-  },
-  originWhitelistToRegex: (originWhitelist: string): string => {
-    return escapeStringRegexp(originWhitelist).replace(/\\\*/g, '.*');
-  },
+import escapeStringRegexp from 'escape-string-regexp';
+import { Linking } from 'react-native';
+import type {
+  WebViewNavigationEvent,
+  WebViewNavigation,
+  OnShouldStartLoadWithRequest,
+} from './WebViewTypes';
+
+const defaultOriginWhitelist = ['http://*', 'https://*'];
+
+const extractOrigin = (url: string): string => {
+  const result = /^[A-Za-z0-9]+:(\/\/)?[^/]*/.exec(url);
+  return result === null ? '' : result[0];
+};
+
+const originWhitelistToRegex = (originWhitelist: string): string =>
+  escapeStringRegexp(originWhitelist).replace(/\\\*/g, '.*');
+
+const passesWhitelist = (compiledWhitelist: Array<string>, url: string) => {
+  const origin = extractOrigin(url);
+  return compiledWhitelist.some(x => new RegExp(x).test(origin));
+};
+
+const compileWhitelist = (
+  originWhitelist: ?$ReadOnlyArray<string>,
+): Array<string> =>
+  ['about:blank', ...(originWhitelist || [])].map(originWhitelistToRegex);
+
+const createOnShouldStartLoadWithRequest = (
+  loadRequest: (
+    shouldStart: boolean,
+    url: string,
+    lockIdentifier: number,
+  ) => void,
+  originWhitelist: ?$ReadOnlyArray<string>,
+  onShouldStartLoadWithRequest: ?OnShouldStartLoadWithRequest,
+) => {
+  return ({ nativeEvent }: WebViewNavigationEvent) => {
+    let shouldStart = true;
+    const { url, lockIdentifier } = nativeEvent;
+
+    if (!passesWhitelist(compileWhitelist(originWhitelist), url)) {
+      Linking.openURL(url);
+      shouldStart = false
+    }
+
+    if (onShouldStartLoadWithRequest) {
+      shouldStart = onShouldStartLoadWithRequest(nativeEvent);
+    }
+
+    loadRequest(shouldStart, url, lockIdentifier);
+  };
 };
 
-module.exports = WebViewShared;
+export { defaultOriginWhitelist, createOnShouldStartLoadWithRequest };

js/WebViewTypes.js

 
 'use strict';
 
-import type {Node, Element, ComponentType} from 'react';
+import type { Node, Element, ComponentType } from 'react';
 
-import type {SyntheticEvent} from 'CoreEventTypes';
-import type {EdgeInsetsProp} from 'EdgeInsetsPropType';
-import type {ViewStyleProp} from 'StyleSheet';
-import type {ViewProps} from 'ViewPropTypes';
+import type { SyntheticEvent } from 'CoreEventTypes';
+import type { EdgeInsetsProp } from 'EdgeInsetsPropType';
+import type { ViewStyleProp } from 'StyleSheet';
+import type { ViewProps } from 'ViewPropTypes';
 
 export type WebViewNativeEvent = $ReadOnly<{|
   url: string,
   title: string,
   canGoBack: boolean,
   canGoForward: boolean,
+  lockIdentifier: number,
 |}>;
 
 export type WebViewProgressEvent = $ReadOnly<{|
-    ...WebViewNativeEvent,
-    progress: number,
-|}>
+  ...WebViewNativeEvent,
+  progress: number,
+|}>;
 
 export type WebViewNavigation = $ReadOnly<{|
   ...WebViewNativeEvent,
 export type WebViewSource = WebViewSourceUri | WebViewSourceHtml;
 
 export type WebViewNativeConfig = $ReadOnly<{|
-  /*
+  /**
    * The native component used to render the WebView.
    */
   component?: ComponentType<WebViewSharedProps>,
-  /*
+  /**
    * Set props directly on the native component WebView. Enables custom props which the
    * original WebView doesn't pass through.
    */
   props?: ?Object,
-  /*
+  /**
    * Set the ViewManager to use for communication with the native side.
    * @platform ios
    */
   viewManager?: ?Object,
 |}>;
 
+export type OnShouldStartLoadWithRequest = (
+  event: WebViewNavigation,
+) => boolean;
+
 export type IOSWebViewProps = $ReadOnly<{|
   /**
    * If true, use WKWebView instead of UIWebView.
    */
   scrollEnabled?: ?boolean,
 
+  /**
+   * If the value of this property is true, the scroll view stops on multiples
+   * of the scroll view’s bounds when the user scrolls.
+   * The default value is false.
+   * @platform ios
+   */
+  pagingEnabled?: ?boolean,
+
   /**
    * The amount by which the web view content is inset from the edges of
    * the scroll view. Defaults to {top: 0, left: 0, bottom: 0, right: 0}.
    *
    * @platform ios
    */
-  dataDetectorTypes?:
-    | ?DataDetectorTypes
-    | $ReadOnlyArray<DataDetectorTypes>,
-
-  /**
-   * Function that allows custom handling of any web view requests. Return
-   * `true` from the function to continue loading the request and `false`
-   * to stop loading.
-   * @platform ios
-   */
-  onShouldStartLoadWithRequest?: (event: WebViewEvent) => mixed,
+  dataDetectorTypes?: ?DataDetectorTypes | $ReadOnlyArray<DataDetectorTypes>,
 
   /**
    * Boolean that determines whether HTML5 videos play inline or use the
    * back-forward list navigations.
    */
   allowsBackForwardNavigationGestures?: ?boolean,
+  /**
+   * A Boolean value indicating whether WebKit WebView should be created using a shared
+   * process pool, enabling WebViews to share cookies and localStorage between each other.
+   * Default is true but can be set to false for backwards compatibility.
+   * @platform ios
+   */
+  useSharedProcessPool?: ?boolean,
   /**
    * The custom user agent string.
    */
   userAgent?: ?string,
+
+  /**
+   * A Boolean value that determines whether pressing on a link
+   * displays a preview of the destination for the link.
+   *
+   * This property is available on devices that support 3D Touch.
+   * In iOS 10 and later, the default value is `true`; before that, the default value is `false`.
+   * @platform ios
+   */
+  allowsLinkPreview?: ?boolean,
 |}>;
 
 export type AndroidWebViewProps = $ReadOnly<{|
    */
   saveFormDataDisabled?: ?boolean,
 
-  /*
+  /**
    * Used on Android only, controls whether the given list of URL prefixes should
    * make {@link com.facebook.react.views.webview.ReactWebViewClient} to launch a
    * default activity intent for those URL instead of loading it within the webview.
   mixedContentMode?: ?('never' | 'always' | 'compatibility'),
 |}>;
 
-export type WebViewSharedProps =  $ReadOnly<{|
+export type WebViewSharedProps = $ReadOnly<{|
   ...ViewProps,
   ...IOSWebViewProps,
   ...AndroidWebViewProps,
    */
   source?: ?WebViewSource,
 
+  /**
+   * Does not store any data within the lifetime of the WebView.
+   */
+  incognito?: ?boolean,
+
   /**
    * Function that returns a view to show if there's an error.
    */
-  renderError: (errorDomain: ?string, errorCode: number, errorDesc: string) => Element<any>, // view to show if there's an error
+  renderError: (
+    errorDomain: ?string,
+    errorCode: number,
+    errorDesc: string,
+  ) => Element<any>, // view to show if there's an error
 
   /**
    * Function that returns a loading indicator.
    */
   originWhitelist?: $ReadOnlyArray<string>,
 
+  /**
+   * Function that allows custom handling of any web view requests. Return
+   * `true` from the function to continue loading the request and `false`
+   * to stop loading. The `navigationType` is always `other` on android.
+   */
+  onShouldStartLoadWithRequest?: OnShouldStartLoadWithRequest,
+
   /**
    * Override the native component used to render the WebView. Enables a custom native
    * WebView which uses the same JavaScript as the original WebView.

package.json

     "Thibault Malbranche <malbranche.thibault@gmail.com>"
   ],
   "license": "MIT",
-  "version": "2.8.0",
+  "version": "3.1.1",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
     "test:ios:flow": "flow check",

typings/index.d.ts

   readonly canGoForward: boolean;
 }
 
+export interface WebViewIOSLoadRequestEvent extends WebViewNativeEvent {
+  target: number;
+  lockIdentifier: number;
+  navigationType: "click" | "formsubmit" | "backforward" | "reload" | "formresubmit" | "other";
+}
+
 export interface WebViewProgressEvent extends WebViewNativeEvent {
   readonly progress: number;
 }
    */
   scrollEnabled?: boolean;
 
+  /**
+   * If the value of this property is true, the scroll view stops on multiples
+   * of the scroll view’s bounds when the user scrolls.
+   * The default value is false.
+   * @platform ios
+   */
+  pagingEnabled?: boolean,
+
   /**
    * The amount by which the web view content is inset from the edges of
    * the scroll view. Defaults to {top: 0, left: 0, bottom: 0, right: 0}.
    * to stop loading.
    * @platform ios
    */
-  onShouldStartLoadWithRequest?: (event: WebViewNativeEvent) => any;
+  onShouldStartLoadWithRequest?: (event: WebViewIOSLoadRequestEvent) => any;
 
   /**
    * Boolean that determines whether HTML5 videos play inline or use the
    * backward compatible.
    */
   hideKeyboardAccessoryView?: boolean;
+  /**
+   * If true, this will be able horizontal swipe gestures when using the WKWebView. The default value is `false`.
+   */
+  allowsBackForwardNavigationGestures?: boolean;
+
+  /**
+   * A Boolean value that determines whether pressing on a link
+   * displays a preview of the destination for the link.
+   *
+   * This property is available on devices that support 3D Touch.
+   * In iOS 10 and later, the default value is `true`; before that, the default value is `false`.
+   * @platform ios
+   */
+  allowsLinkPreview?: boolean;
 }
 
 export interface AndroidWebViewProps {
    * Boolean value that forces the `WebView` to show the loading view
    * on the first load.
    */
-  startInLoadingState?: string;
+  startInLoadingState?: boolean;
 
   /**
    * Set this to provide JavaScript that will be injected into the web page
   public goBack: () => void;
   public reload: () => void;
   public stopLoading: () => void;
+  public postMessage: (msg: string) => void;
+  public injectJavaScript: (js: string) => void;
 }