diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 4244e9f6..197fde9e 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -16,26 +16,16 @@
   <component name="ChangeListManager">
     <list default="true" id="9b41f7a2-a71e-4923-91fb-249d7815b3e7" name="Default" comment="">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/CHANGELOG.md" beforeDir="false" afterPath="$PROJECT_DIR$/CHANGELOG.md" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/AndroidManifest.xml" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/AndroidManifest.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerHandler.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerHandler.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerTriggerResourceType.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/ContentBlocker/ContentBlockerTriggerResourceType.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/FlutterWebView.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/FlutterWebView.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppBrowserActivity.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppBrowserActivity.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppBrowserFlutterPlugin.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppBrowserFlutterPlugin.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/android/build.gradle" beforeDir="false" afterPath="$PROJECT_DIR$/android/build.gradle" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebChromeClient.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebChromeClient.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebView.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebView.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebViewClient.java" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebViewClient.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/android/src/main/res/values/styles.xml" beforeDir="false" afterPath="$PROJECT_DIR$/android/src/main/res/values/styles.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/example/android/app/src/main/AndroidManifest.xml" beforeDir="false" afterPath="$PROJECT_DIR$/example/android/app/src/main/AndroidManifest.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/example/android/app/src/main/java/com/pichillilorenzo/flutterwebviewexample/MainActivity.java" beforeDir="false" afterPath="$PROJECT_DIR$/example/android/app/src/main/java/com/pichillilorenzo/flutterwebviewexample/MainActivity.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/assets/index.html" beforeDir="false" afterPath="$PROJECT_DIR$/example/assets/index.html" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/example/lib/inline_example.screen.dart" beforeDir="false" afterPath="$PROJECT_DIR$/example/lib/inline_example.screen.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/example/lib/webview_example.screen.dart" beforeDir="false" afterPath="$PROJECT_DIR$/example/lib/webview_example.screen.dart" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/ios/Classes/FlutterWebViewController.swift" beforeDir="false" afterPath="$PROJECT_DIR$/ios/Classes/FlutterWebViewController.swift" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/ios/Classes/InAppWebView.swift" beforeDir="false" afterPath="$PROJECT_DIR$/ios/Classes/InAppWebView.swift" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/ios/flutter_inappbrowser.podspec" beforeDir="false" afterPath="$PROJECT_DIR$/ios/flutter_inappbrowser.podspec" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/lib/src/in_app_browser.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/src/in_app_browser.dart" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/lib/src/in_app_webview.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/src/in_app_webview.dart" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/lib/src/types.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/src/types.dart" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/.dart_tool/" />
     <ignored path="$PROJECT_DIR$/.idea/" />
@@ -58,8 +48,20 @@
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/CHANGELOG.md">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="169">
-              <caret line="20" column="92" selection-start-line="20" selection-start-column="92" selection-end-line="20" selection-end-column="92" />
+            <state relative-caret-position="454">
+              <caret line="39" column="107" selection-start-line="39" selection-start-column="107" selection-end-line="39" selection-end-column="107" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/example/lib/webview_example.screen.dart">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="79">
+              <caret line="88" selection-start-line="88" selection-end-line="88" />
+              <folding>
+                <element signature="e#0#20#0" expanded="true" />
+              </folding>
             </state>
           </provider>
         </entry>
@@ -76,8 +78,8 @@
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/lib/src/in_app_webview.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="205">
-              <caret line="164" column="80" selection-start-line="164" selection-start-column="80" selection-end-line="164" selection-end-column="80" />
+            <state relative-caret-position="-727">
+              <caret line="439" column="66" selection-start-line="439" selection-start-column="58" selection-end-line="439" selection-end-column="66" />
               <folding>
                 <element signature="e#0#17#0" expanded="true" />
               </folding>
@@ -88,8 +90,8 @@
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/lib/src/in_app_browser.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="428">
-              <caret line="380" column="80" lean-forward="true" selection-start-line="376" selection-start-column="2" selection-end-line="380" selection-end-column="80" />
+            <state relative-caret-position="222">
+              <caret line="370" selection-start-line="370" selection-end-line="370" />
               <folding>
                 <element signature="e#0#20#0" expanded="true" />
               </folding>
@@ -100,7 +102,7 @@
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/lib/src/types.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="193">
+            <state relative-caret-position="477">
               <caret line="212" column="22" selection-start-line="212" selection-start-column="7" selection-end-line="212" selection-end-column="22" />
               <folding>
                 <element signature="e#0#32#0" expanded="true" />
@@ -112,8 +114,8 @@
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/example/assets/index.html">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="260">
-              <caret line="58" column="44" selection-start-line="58" selection-start-column="44" selection-end-line="58" selection-end-column="44" />
+            <state relative-caret-position="514">
+              <caret line="73" column="12" selection-start-line="73" selection-start-column="12" selection-end-line="73" selection-end-column="12" />
             </state>
           </provider>
         </entry>
@@ -121,8 +123,8 @@
       <file pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/example/lib/inline_example.screen.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="318">
-              <caret line="190" column="26" lean-forward="true" selection-start-line="190" selection-start-column="26" selection-end-line="190" selection-end-column="26" />
+            <state relative-caret-position="353">
+              <caret line="205" column="82" lean-forward="true" selection-start-line="205" selection-start-column="82" selection-end-line="205" selection-end-column="82" />
               <folding>
                 <element signature="e#0#22#0" expanded="true" />
               </folding>
@@ -130,11 +132,20 @@
           </provider>
         </entry>
       </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$USER_HOME$/flutter/packages/flutter/lib/src/material/dialog.dart">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="307">
+              <caret line="690" column="10" selection-start-line="690" selection-start-column="10" selection-end-line="690" selection-end-column="10" />
+            </state>
+          </provider>
+        </entry>
+      </file>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/example/lib/main.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="105">
-              <caret line="17" column="2" selection-start-line="17" selection-start-column="2" selection-end-line="17" selection-end-column="2" />
+            <state relative-caret-position="405">
+              <caret line="37" column="18" selection-start-line="37" selection-start-column="18" selection-end-line="37" selection-end-column="18" />
               <folding>
                 <element signature="e#0#20#0" expanded="true" />
               </folding>
@@ -154,9 +165,6 @@
   </component>
   <component name="FindInProjectRecents">
     <findStrings>
-      <find>List&lt;Con</find>
-      <find>appCacheEnabled</find>
-      <find>List&lt;Content</find>
       <find>NOTE</find>
       <find>onGeolocationPermissionsShowPrompt</find>
       <find>&quot;onGeolocationPermissionsShowPrompt&quot;</find>
@@ -184,6 +192,9 @@
       <find>onJs</find>
       <find>onJsAlert</find>
       <find>defaultValue</find>
+      <find>onJsA</find>
+      <find>toMap()</find>
+      <find>.toMap()</find>
     </findStrings>
     <replaceStrings>
       <replace>activity.getPreferences(0)</replace>
@@ -242,7 +253,6 @@
         <option value="$PROJECT_DIR$/lib/flutter_inappbrowser.dart" />
         <option value="$PROJECT_DIR$/example/lib/chrome_safari_example.screen.dart" />
         <option value="$PROJECT_DIR$/lib/src/chrome_safari_browser.dart" />
-        <option value="$PROJECT_DIR$/example/lib/webview_example.screen.dart" />
         <option value="$PROJECT_DIR$/example/pubspec.yaml" />
         <option value="$PROJECT_DIR$/lib/src/webview_options.dart" />
         <option value="$PROJECT_DIR$/example/ios/Runner/Info.plist" />
@@ -250,16 +260,16 @@
         <option value="$PROJECT_DIR$/example/lib/main.dart" />
         <option value="$PROJECT_DIR$/lib/src/content_blocker.dart" />
         <option value="$PROJECT_DIR$/lib/src/types.dart" />
-        <option value="$PROJECT_DIR$/example/assets/index.html" />
-        <option value="$PROJECT_DIR$/lib/src/in_app_browser.dart" />
-        <option value="$PROJECT_DIR$/lib/src/in_app_webview.dart" />
         <option value="$PROJECT_DIR$/CHANGELOG.md" />
+        <option value="$PROJECT_DIR$/lib/src/in_app_browser.dart" />
+        <option value="$PROJECT_DIR$/example/lib/webview_example.screen.dart" />
+        <option value="$PROJECT_DIR$/lib/src/in_app_webview.dart" />
+        <option value="$PROJECT_DIR$/example/assets/index.html" />
         <option value="$PROJECT_DIR$/example/lib/inline_example.screen.dart" />
       </list>
     </option>
   </component>
   <component name="ProjectFrameBounds" extendedState="6">
-    <option name="x" value="-1920" />
     <option name="y" value="23" />
     <option name="width" value="1920" />
     <option name="height" value="1057" />
@@ -270,6 +280,17 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="Scope">
+        <subPane subId="Project Files">
+          <expand>
+            <path>
+              <item name="Root" type="cbb8eebc:String" user="Root" />
+              <item name="flutter_inappbrowser" type="cbb8eebc:String" user="flutter_inappbrowser" />
+            </path>
+          </expand>
+          <select />
+        </subPane>
+      </pane>
       <pane id="AndroidView">
         <subPane>
           <expand>
@@ -326,17 +347,6 @@
           <select />
         </subPane>
       </pane>
-      <pane id="Scope">
-        <subPane subId="Project Files">
-          <expand>
-            <path>
-              <item name="Root" type="cbb8eebc:String" user="Root" />
-              <item name="flutter_inappbrowser" type="cbb8eebc:String" user="flutter_inappbrowser" />
-            </path>
-          </expand>
-          <select />
-        </subPane>
-      </pane>
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -487,11 +497,11 @@
     </todo-panel>
   </component>
   <component name="ToolWindowManager">
-    <frame x="-1920" y="23" width="1920" height="1057" extended-state="6" />
+    <frame x="0" y="23" width="1920" height="1057" extended-state="6" />
     <editor active="true" />
     <layout>
-      <window_info content_ui="combo" id="Project" order="0" sideWeight="0.59969324" visible="true" weight="0.15867944" />
-      <window_info id="Structure" order="1" sideWeight="0.40030676" side_tool="true" visible="true" weight="0.15867944" />
+      <window_info content_ui="combo" id="Project" order="0" sideWeight="0.59711075" visible="true" weight="0.15867944" />
+      <window_info id="Structure" order="1" sideWeight="0.40288925" side_tool="true" visible="true" weight="0.15867944" />
       <window_info id="Designer" order="2" />
       <window_info id="Build Variants" order="3" side_tool="true" />
       <window_info id="Captures" order="4" side_tool="true" weight="0.32936507" />
@@ -501,7 +511,7 @@
       <window_info id="Resources Explorer" order="8" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" weight="0.32642487" />
-      <window_info active="true" anchor="bottom" id="Run" order="2" sideWeight="0.49307775" visible="true" weight="0.32435232" />
+      <window_info active="true" anchor="bottom" id="Run" order="2" sideWeight="0.49307775" visible="true" weight="0.35440415" />
       <window_info anchor="bottom" id="Debug" order="3" weight="0.34196892" />
       <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
       <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
@@ -509,7 +519,7 @@
       <window_info anchor="bottom" id="Android Profiler" order="7" show_stripe_button="false" />
       <window_info anchor="bottom" id="Event Log" order="8" sideWeight="0.50692225" side_tool="true" weight="0.38445595" />
       <window_info anchor="bottom" id="Version Control" order="9" weight="0.32953367" />
-      <window_info anchor="bottom" id="Terminal" order="10" sideWeight="0.49533224" weight="0.2611399" />
+      <window_info anchor="bottom" id="Terminal" order="10" sideWeight="0.49533224" weight="0.29430053" />
       <window_info anchor="bottom" id="Logcat" order="11" weight="0.32953367" />
       <window_info anchor="bottom" id="Messages" order="12" weight="0.226943" />
       <window_info anchor="bottom" id="Dependency Viewer" order="13" weight="0.32800853" />
@@ -748,23 +758,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/example/lib/webview_example.screen.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="184">
-          <caret line="81" column="47" selection-start-line="81" selection-start-column="47" selection-end-line="81" selection-end-column="47" />
-          <folding>
-            <element signature="e#0#20#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$USER_HOME$/flutter/packages/flutter/lib/src/material/dialog.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="189">
-          <caret line="690" column="10" selection-start-line="690" selection-start-column="10" selection-end-line="690" selection-end-column="10" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/example/pubspec.yaml">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="345">
@@ -793,23 +786,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/example/lib/main.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="105">
-          <caret line="17" column="2" selection-start-line="17" selection-start-column="2" selection-end-line="17" selection-end-column="2" />
-          <folding>
-            <element signature="e#0#20#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/example/assets/index.html">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="260">
-          <caret line="58" column="44" selection-start-line="58" selection-start-column="44" selection-end-line="58" selection-end-column="44" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/lib/src/content_blocker.dart">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="375">
@@ -817,16 +793,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/lib/src/in_app_webview.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="205">
-          <caret line="164" column="80" selection-start-line="164" selection-start-column="80" selection-end-line="164" selection-end-column="80" />
-          <folding>
-            <element signature="e#0#17#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/lib/src/webview_options.dart">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="-1456">
@@ -837,6 +803,13 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/CHANGELOG.md">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="454">
+          <caret line="39" column="107" selection-start-line="39" selection-start-column="107" selection-end-line="39" selection-end-column="107" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/pubspec.yaml">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="30">
@@ -844,17 +817,10 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/CHANGELOG.md">
+    <entry file="file://$PROJECT_DIR$/example/lib/webview_example.screen.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="169">
-          <caret line="20" column="92" selection-start-line="20" selection-start-column="92" selection-end-line="20" selection-end-column="92" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/lib/src/in_app_browser.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="428">
-          <caret line="380" column="80" lean-forward="true" selection-start-line="376" selection-start-column="2" selection-end-line="380" selection-end-column="80" />
+        <state relative-caret-position="79">
+          <caret line="88" selection-start-line="88" selection-end-line="88" />
           <folding>
             <element signature="e#0#20#0" expanded="true" />
           </folding>
@@ -863,7 +829,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/lib/src/types.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="193">
+        <state relative-caret-position="477">
           <caret line="212" column="22" selection-start-line="212" selection-start-column="7" selection-end-line="212" selection-end-column="22" />
           <folding>
             <element signature="e#0#32#0" expanded="true" />
@@ -871,10 +837,54 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/lib/src/in_app_webview.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-727">
+          <caret line="439" column="66" selection-start-line="439" selection-start-column="58" selection-end-line="439" selection-end-column="66" />
+          <folding>
+            <element signature="e#0#17#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/lib/src/in_app_browser.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="222">
+          <caret line="370" selection-start-line="370" selection-end-line="370" />
+          <folding>
+            <element signature="e#0#20#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/example/lib/main.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="405">
+          <caret line="37" column="18" selection-start-line="37" selection-start-column="18" selection-end-line="37" selection-end-column="18" />
+          <folding>
+            <element signature="e#0#20#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/example/assets/index.html">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="514">
+          <caret line="73" column="12" selection-start-line="73" selection-start-column="12" selection-end-line="73" selection-end-column="12" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$USER_HOME$/flutter/packages/flutter/lib/src/material/dialog.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="307">
+          <caret line="690" column="10" selection-start-line="690" selection-start-column="10" selection-end-line="690" selection-end-column="10" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/example/lib/inline_example.screen.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="318">
-          <caret line="190" column="26" lean-forward="true" selection-start-line="190" selection-start-column="26" selection-end-line="190" selection-end-column="26" />
+        <state relative-caret-position="353">
+          <caret line="205" column="82" lean-forward="true" selection-start-line="205" selection-start-column="82" selection-end-line="205" selection-end-column="82" />
           <folding>
             <element signature="e#0#22#0" expanded="true" />
           </folding>
diff --git a/android/build.gradle b/android/build.gradle
index fc587565..e53aab08 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,16 +1,3 @@
-def PLUGIN = "flutter_inappbrowser";
-def ANDROIDX_WARNING = "flutterPluginsAndroidXWarning";
-gradle.buildFinished { buildResult ->
-    if (buildResult.failure && !rootProject.ext.has(ANDROIDX_WARNING)) {
-        println '         *********************************************************'
-        println 'WARNING: This version of ' + PLUGIN + ' will break your Android build if it or its dependencies aren\'t compatible with AndroidX.'
-        println '         See https://goo.gl/CP92wY for more information on the problem and how to fix it.'
-        println '         This warning prints for all Android build failures. The real root cause of the error may be unrelated.'
-        println '         *********************************************************'
-        rootProject.ext.set(ANDROIDX_WARNING, true);
-    }
-}
-
 group 'com.pichillilorenzo.flutter_inappbrowser'
 version '1.0-SNAPSHOT'
 
diff --git a/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebChromeClient.java b/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebChromeClient.java
index 0df49d0d..b20461e8 100644
--- a/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebChromeClient.java
+++ b/android/src/main/java/com/pichillilorenzo/flutter_inappbrowser/InAppWebView/InAppWebChromeClient.java
@@ -112,67 +112,78 @@ public class InAppWebChromeClient extends WebChromeClient {
     getChannel().invokeMethod("onJsAlert", obj, new MethodChannel.Result() {
       @Override
       public void success(Object response) {
-        Map<String, Object> responseMap = (Map<String, Object>) response;
-        String responseMessage = (String) responseMap.get("message");
-        String confirmButtonTitle = (String) responseMap.get("confirmButtonTitle");
-        boolean handledByClient = (boolean) responseMap.get("handledByClient");
-        if (handledByClient) {
-          Integer action = (Integer) responseMap.get("action");
-          action = action != null ? action : 1;
-          switch (action) {
-            case 0:
-              result.confirm();
-              break;
-            case 1:
-            default:
-              result.cancel();
-          }
-        } else {
-          String alertMessage = (responseMessage != null && !responseMessage.isEmpty()) ? responseMessage : message;
-          Log.d(LOG_TAG, alertMessage);
-          DialogInterface.OnClickListener clickListener = new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-              result.confirm();
-              dialog.dismiss();
+        String responseMessage = null;
+        String confirmButtonTitle = null;
+
+        if (response != null) {
+          Map<String, Object> responseMap = (Map<String, Object>) response;
+          responseMessage = (String) responseMap.get("message");
+          confirmButtonTitle = (String) responseMap.get("confirmButtonTitle");
+          Boolean handledByClient = (Boolean) responseMap.get("handledByClient");
+          if (handledByClient != null && handledByClient) {
+            Integer action = (Integer) responseMap.get("action");
+            action = action != null ? action : 1;
+            switch (action) {
+              case 0:
+                result.confirm();
+                break;
+              case 1:
+              default:
+                result.cancel();
             }
-          };
-
-          AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(view.getContext(), R.style.Theme_AppCompat_Dialog_Alert);
-          alertDialogBuilder.setMessage(alertMessage);
-          if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
-            alertDialogBuilder.setPositiveButton(confirmButtonTitle, clickListener);
-          } else {
-            alertDialogBuilder.setPositiveButton(android.R.string.ok, clickListener);
+            return;
           }
-
-          alertDialogBuilder.setOnCancelListener(new DialogInterface.OnCancelListener() {
-            @Override
-            public void onCancel(DialogInterface dialog) {
-              result.cancel();
-              dialog.dismiss();
-            }
-          });
-
-          AlertDialog alertDialog = alertDialogBuilder.create();
-          alertDialog.show();
         }
+
+        createAlertDialog(view, message, result, responseMessage, confirmButtonTitle);
       }
 
       @Override
       public void error(String s, String s1, Object o) {
         Log.e(LOG_TAG, s + ", " + s1);
+        result.cancel();
       }
 
       @Override
       public void notImplemented() {
-
+        createAlertDialog(view, message, result, null, null);
       }
     });
 
     return true;
   }
 
+  public void createAlertDialog(WebView view, String message, final JsResult result, String responseMessage, String confirmButtonTitle) {
+    String alertMessage = (responseMessage != null && !responseMessage.isEmpty()) ? responseMessage : message;
+
+    DialogInterface.OnClickListener clickListener = new DialogInterface.OnClickListener() {
+      @Override
+      public void onClick(DialogInterface dialog, int which) {
+        result.confirm();
+        dialog.dismiss();
+      }
+    };
+
+    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(view.getContext(), R.style.Theme_AppCompat_Dialog_Alert);
+    alertDialogBuilder.setMessage(alertMessage);
+    if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
+      alertDialogBuilder.setPositiveButton(confirmButtonTitle, clickListener);
+    } else {
+      alertDialogBuilder.setPositiveButton(android.R.string.ok, clickListener);
+    }
+
+    alertDialogBuilder.setOnCancelListener(new DialogInterface.OnCancelListener() {
+      @Override
+      public void onCancel(DialogInterface dialog) {
+        result.cancel();
+        dialog.dismiss();
+      }
+    });
+
+    AlertDialog alertDialog = alertDialogBuilder.create();
+    alertDialog.show();
+  }
+
   @Override
   public boolean onJsConfirm(final WebView view, String url, final String message,
                              final JsResult result) {
@@ -184,79 +195,91 @@ public class InAppWebChromeClient extends WebChromeClient {
     getChannel().invokeMethod("onJsConfirm", obj, new MethodChannel.Result() {
       @Override
       public void success(Object response) {
-        Map<String, Object> responseMap = (Map<String, Object>) response;
-        String responseMessage = (String) responseMap.get("message");
-        String confirmButtonTitle = (String) responseMap.get("confirmButtonTitle");
-        String cancelButtonTitle = (String) responseMap.get("cancelButtonTitle");
-        boolean handledByClient = (boolean) responseMap.get("handledByClient");
-        if (handledByClient) {
-          Integer action = (Integer) responseMap.get("action");
-          action = action != null ? action : 1;
-          switch (action) {
-            case 0:
-              result.confirm();
-              break;
-            case 1:
-            default:
-              result.cancel();
-          }
-        } else {
-          String alertMessage = (responseMessage != null && !responseMessage.isEmpty()) ? responseMessage : message;
-          DialogInterface.OnClickListener confirmClickListener = new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-              result.confirm();
-              dialog.dismiss();
-            }
-          };
-          DialogInterface.OnClickListener cancelClickListener = new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-              result.cancel();
-              dialog.dismiss();
-            }
-          };
+        String responseMessage = null;
+        String confirmButtonTitle = null;
+        String cancelButtonTitle = null;
 
-          AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(view.getContext(), R.style.Theme_AppCompat_Dialog_Alert);
-          alertDialogBuilder.setMessage(alertMessage);
-          if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
-            alertDialogBuilder.setPositiveButton(confirmButtonTitle, confirmClickListener);
-          } else {
-            alertDialogBuilder.setPositiveButton(android.R.string.ok, confirmClickListener);
-          }
-          if (cancelButtonTitle != null && !cancelButtonTitle.isEmpty()) {
-            alertDialogBuilder.setNegativeButton(cancelButtonTitle, cancelClickListener);
-          } else {
-            alertDialogBuilder.setNegativeButton(android.R.string.cancel, cancelClickListener);
-          }
-
-          alertDialogBuilder.setOnCancelListener(new DialogInterface.OnCancelListener() {
-            @Override
-            public void onCancel(DialogInterface dialog) {
-              result.cancel();
-              dialog.dismiss();
+        if (response != null) {
+          Map<String, Object> responseMap = (Map<String, Object>) response;
+          responseMessage = (String) responseMap.get("message");
+          confirmButtonTitle = (String) responseMap.get("confirmButtonTitle");
+          cancelButtonTitle = (String) responseMap.get("cancelButtonTitle");
+          Boolean handledByClient = (Boolean) responseMap.get("handledByClient");
+          if (handledByClient != null && handledByClient) {
+            Integer action = (Integer) responseMap.get("action");
+            action = action != null ? action : 1;
+            switch (action) {
+              case 0:
+                result.confirm();
+                break;
+              case 1:
+              default:
+                result.cancel();
             }
-          });
-
-          AlertDialog alertDialog = alertDialogBuilder.create();
-          alertDialog.show();
+            return;
+          }
         }
+
+        createConfirmDialog(view, message, result, responseMessage, confirmButtonTitle, cancelButtonTitle);
       }
 
       @Override
       public void error(String s, String s1, Object o) {
         Log.e(LOG_TAG, s + ", " + s1);
+        result.cancel();
       }
 
       @Override
       public void notImplemented() {
-
+        createConfirmDialog(view, message, result, null, null, null);
       }
     });
 
     return true;
   }
 
+  public void createConfirmDialog(WebView view, String message, final JsResult result, String responseMessage, String confirmButtonTitle, String cancelButtonTitle) {
+    String alertMessage = (responseMessage != null && !responseMessage.isEmpty()) ? responseMessage : message;
+    DialogInterface.OnClickListener confirmClickListener = new DialogInterface.OnClickListener() {
+      @Override
+      public void onClick(DialogInterface dialog, int which) {
+        result.confirm();
+        dialog.dismiss();
+      }
+    };
+    DialogInterface.OnClickListener cancelClickListener = new DialogInterface.OnClickListener() {
+      @Override
+      public void onClick(DialogInterface dialog, int which) {
+        result.cancel();
+        dialog.dismiss();
+      }
+    };
+
+    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(view.getContext(), R.style.Theme_AppCompat_Dialog_Alert);
+    alertDialogBuilder.setMessage(alertMessage);
+    if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
+      alertDialogBuilder.setPositiveButton(confirmButtonTitle, confirmClickListener);
+    } else {
+      alertDialogBuilder.setPositiveButton(android.R.string.ok, confirmClickListener);
+    }
+    if (cancelButtonTitle != null && !cancelButtonTitle.isEmpty()) {
+      alertDialogBuilder.setNegativeButton(cancelButtonTitle, cancelClickListener);
+    } else {
+      alertDialogBuilder.setNegativeButton(android.R.string.cancel, cancelClickListener);
+    }
+
+    alertDialogBuilder.setOnCancelListener(new DialogInterface.OnCancelListener() {
+      @Override
+      public void onCancel(DialogInterface dialog) {
+        result.cancel();
+        dialog.dismiss();
+      }
+    });
+
+    AlertDialog alertDialog = alertDialogBuilder.create();
+    alertDialog.show();
+  }
+
   @Override
   public boolean onJsPrompt(final WebView view, String url, final String message,
                             final String defaultValue, final JsPromptResult result) {
@@ -269,99 +292,112 @@ public class InAppWebChromeClient extends WebChromeClient {
     getChannel().invokeMethod("onJsPrompt", obj, new MethodChannel.Result() {
       @Override
       public void success(Object response) {
-        Map<String, Object> responseMap = (Map<String, Object>) response;
-        String responseMessage = (String) responseMap.get("message");
-        String responseDefaultValue = (String) responseMap.get("defaultValue");
-        String confirmButtonTitle = (String) responseMap.get("confirmButtonTitle");
-        String cancelButtonTitle = (String) responseMap.get("cancelButtonTitle");
-        final String value = (String) responseMap.get("value");
-        boolean handledByClient = (boolean) responseMap.get("handledByClient");
-        if (handledByClient) {
-          Integer action = (Integer) responseMap.get("action");
-          action = action != null ? action : 1;
-          switch (action) {
-            case 0:
-              if (value != null)
+        String responseMessage = null;
+        String responseDefaultValue = null;
+        String confirmButtonTitle = null;
+        String cancelButtonTitle = null;
+        String value = null;
+
+        if (response != null) {
+          Map<String, Object> responseMap = (Map<String, Object>) response;
+          responseMessage = (String) responseMap.get("message");
+          responseDefaultValue = (String) responseMap.get("defaultValue");
+          confirmButtonTitle = (String) responseMap.get("confirmButtonTitle");
+          cancelButtonTitle = (String) responseMap.get("cancelButtonTitle");
+          value = (String) responseMap.get("value");
+          Boolean handledByClient = (Boolean) responseMap.get("handledByClient");
+          if (handledByClient != null && handledByClient) {
+            Integer action = (Integer) responseMap.get("action");
+            action = action != null ? action : 1;
+            switch (action) {
+              case 0:
                 result.confirm(value);
-              else
-                result.confirm();
-              break;
-            case 1:
-            default:
-              result.cancel();
-          }
-        } else {
-          FrameLayout layout = new FrameLayout(view.getContext());
-
-          final EditText input = new EditText(view.getContext());
-          input.setMaxLines(1);
-          input.setText((responseDefaultValue != null && !responseDefaultValue.isEmpty()) ? responseDefaultValue : defaultValue);
-          LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
-                  LinearLayout.LayoutParams.MATCH_PARENT,
-                  LinearLayout.LayoutParams.MATCH_PARENT);
-          input.setLayoutParams(lp);
-
-          layout.setPaddingRelative(45,15,45,0);
-          layout.addView(input);
-
-          String alertMessage = (responseMessage != null && !responseMessage.isEmpty()) ? responseMessage : message;
-          DialogInterface.OnClickListener confirmClickListener = new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-              String text = input.getText().toString();
-              result.confirm(value != null ? value : text);
-              dialog.dismiss();
+                break;
+              case 1:
+              default:
+                result.cancel();
             }
-          };
-          DialogInterface.OnClickListener cancelClickListener = new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-              result.cancel();
-              dialog.dismiss();
-            }
-          };
-
-          AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(view.getContext(), R.style.Theme_AppCompat_Dialog_Alert);
-          alertDialogBuilder.setMessage(alertMessage);
-          if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
-            alertDialogBuilder.setPositiveButton(confirmButtonTitle, confirmClickListener);
-          } else {
-            alertDialogBuilder.setPositiveButton(android.R.string.ok, confirmClickListener);
+            return;
           }
-          if (cancelButtonTitle != null && !cancelButtonTitle.isEmpty()) {
-            alertDialogBuilder.setNegativeButton(cancelButtonTitle, cancelClickListener);
-          } else {
-            alertDialogBuilder.setNegativeButton(android.R.string.cancel, cancelClickListener);
-          }
-
-          alertDialogBuilder.setOnCancelListener(new DialogInterface.OnCancelListener() {
-            @Override
-            public void onCancel(DialogInterface dialog) {
-              result.cancel();
-              dialog.dismiss();
-            }
-          });
-
-          AlertDialog alertDialog = alertDialogBuilder.create();
-          alertDialog.setView(layout);
-          alertDialog.show();
         }
+
+        createPromptDialog(view, message, defaultValue, result, responseMessage, responseDefaultValue, value, cancelButtonTitle, confirmButtonTitle);
       }
 
       @Override
       public void error(String s, String s1, Object o) {
         Log.e(LOG_TAG, s + ", " + s1);
+        result.cancel();
       }
 
       @Override
       public void notImplemented() {
-
+        createPromptDialog(view, message, defaultValue, result, null, null, null, null, null);
       }
     });
 
     return true;
   }
 
+  public void createPromptDialog(WebView view, String message, String defaultValue, final JsPromptResult result, String responseMessage, String responseDefaultValue, String value, String cancelButtonTitle, String confirmButtonTitle) {
+    FrameLayout layout = new FrameLayout(view.getContext());
+
+    final EditText input = new EditText(view.getContext());
+    input.setMaxLines(1);
+    input.setText((responseDefaultValue != null && !responseDefaultValue.isEmpty()) ? responseDefaultValue : defaultValue);
+    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.MATCH_PARENT);
+    input.setLayoutParams(lp);
+
+    layout.setPaddingRelative(45,15,45,0);
+    layout.addView(input);
+
+    String alertMessage = (responseMessage != null && !responseMessage.isEmpty()) ? responseMessage : message;
+
+    final String finalValue = value;
+    DialogInterface.OnClickListener confirmClickListener = new DialogInterface.OnClickListener() {
+      @Override
+      public void onClick(DialogInterface dialog, int which) {
+        String text = input.getText().toString();
+        result.confirm(finalValue != null ? finalValue : text);
+        dialog.dismiss();
+      }
+    };
+    DialogInterface.OnClickListener cancelClickListener = new DialogInterface.OnClickListener() {
+      @Override
+      public void onClick(DialogInterface dialog, int which) {
+        result.cancel();
+        dialog.dismiss();
+      }
+    };
+
+    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(view.getContext(), R.style.Theme_AppCompat_Dialog_Alert);
+    alertDialogBuilder.setMessage(alertMessage);
+    if (confirmButtonTitle != null && !confirmButtonTitle.isEmpty()) {
+      alertDialogBuilder.setPositiveButton(confirmButtonTitle, confirmClickListener);
+    } else {
+      alertDialogBuilder.setPositiveButton(android.R.string.ok, confirmClickListener);
+    }
+    if (cancelButtonTitle != null && !cancelButtonTitle.isEmpty()) {
+      alertDialogBuilder.setNegativeButton(cancelButtonTitle, cancelClickListener);
+    } else {
+      alertDialogBuilder.setNegativeButton(android.R.string.cancel, cancelClickListener);
+    }
+
+    alertDialogBuilder.setOnCancelListener(new DialogInterface.OnCancelListener() {
+      @Override
+      public void onCancel(DialogInterface dialog) {
+        result.cancel();
+        dialog.dismiss();
+      }
+    });
+
+    AlertDialog alertDialog = alertDialogBuilder.create();
+    alertDialog.setView(layout);
+    alertDialog.show();
+  }
+
   @Override
   public boolean onCreateWindow(WebView view, boolean dialog, boolean userGesture, android.os.Message resultMsg)
   {
diff --git a/example/assets/index.html b/example/assets/index.html
index 69ff2616..93a71e2e 100644
--- a/example/assets/index.html
+++ b/example/assets/index.html
@@ -55,13 +55,14 @@
             });
         });
         $(document).ready(function() {
+            /*
             alert("Alert Popup");
             console.log(confirm("Press a button!"));
-            console.log(prompt("Please enter your name", "Harry Potter"));
-
+            console.log(prompt("Please enter your name", "Lorenzo"));
+            */
 
             console.log("jQuery ready");
-/*
+            /*
             if ("geolocation" in navigator) {
                 console.log("Geolocation API enabled");
                 navigator.geolocation.getCurrentPosition(function(position) {
@@ -69,7 +70,8 @@
                 });
             } else {
                 console.log("No geolocation API");
-            }*/
+            }
+            */
         });
     </script>
 </body>
diff --git a/example/lib/inline_example.screen.dart b/example/lib/inline_example.screen.dart
index 5594961a..71a2188e 100644
--- a/example/lib/inline_example.screen.dart
+++ b/example/lib/inline_example.screen.dart
@@ -198,90 +198,16 @@ class _InlineExampleScreenState extends State<InlineExampleScreen> {
               return response;
             },
             onJsAlert: (InAppWebViewController controller, String message) async {
-              JsAlertResponseAction action;
-
-              await showDialog(
-                context: context,
-                builder: (BuildContext context) {
-                  return AlertDialog(
-                    content: Text(message),
-                    actions: <Widget>[
-                      FlatButton(
-                        child: Text("Ok"),
-                        onPressed: () {
-                          action = JsAlertResponseAction.CONFIRM;
-                          Navigator.of(context).pop();
-                        },
-                      ),
-                    ],
-                  );
-                },
-              );
-
+              JsAlertResponseAction action = await createAlertDialog(context, message);
               return new JsAlertResponse(handledByClient: true, action: action);
             },
             onJsConfirm: (InAppWebViewController controller, String message) async {
-              JsConfirmResponseAction action;
-
-              await showDialog(
-                context: context,
-                builder: (BuildContext context) {
-                  return AlertDialog(
-                    content: Text(message),
-                    actions: <Widget>[
-                      FlatButton(
-                        child: Text("Cancel"),
-                        onPressed: () {
-                          action = JsConfirmResponseAction.CANCEL;
-                          Navigator.of(context).pop();
-                        },
-                      ),
-                      FlatButton(
-                        child: Text("Ok"),
-                        onPressed: () {
-                          action = JsConfirmResponseAction.CONFIRM;
-                          Navigator.of(context).pop();
-                        },
-                      ),
-                    ],
-                  );
-                },
-              );
-
+              JsConfirmResponseAction action = await createConfirmDialog(context, message);
               return new JsConfirmResponse(handledByClient: true, action: action);
             },
             onJsPrompt: (InAppWebViewController controller, String message, String defaultValue) async {
-              JsPromptResponseAction action;
               _textFieldController.text = defaultValue;
-
-              await showDialog(
-                context: context,
-                builder: (BuildContext context) {
-                  return AlertDialog(
-                    title: Text(message),
-                    content: TextField(
-                      controller: _textFieldController,
-                    ),
-                    actions: <Widget>[
-                      FlatButton(
-                        child: Text("Cancel"),
-                        onPressed: () {
-                          action = JsPromptResponseAction.CANCEL;
-                          Navigator.of(context).pop();
-                        },
-                      ),
-                      FlatButton(
-                        child: Text("Ok"),
-                        onPressed: () {
-                          action = JsPromptResponseAction.CONFIRM;
-                          Navigator.of(context).pop();
-                        },
-                      ),
-                    ],
-                  );
-                },
-              );
-
+              JsPromptResponseAction action = await createPromptDialog(context, message);
               return new JsPromptResponse(handledByClient: true, action: action, value: _textFieldController.text);
             },
           ),
@@ -319,6 +245,95 @@ class _InlineExampleScreenState extends State<InlineExampleScreen> {
     ]));
   }
 
+  Future<JsAlertResponseAction> createAlertDialog(BuildContext context, String message) async {
+    JsAlertResponseAction action;
+
+    await showDialog(
+      context: context,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          content: Text(message),
+          actions: <Widget>[
+            FlatButton(
+              child: Text("Ok"),
+              onPressed: () {
+                action = JsAlertResponseAction.CONFIRM;
+                Navigator.of(context).pop();
+              },
+            ),
+          ],
+        );
+      },
+    );
+
+    return action;
+  }
+
+  Future<JsConfirmResponseAction> createConfirmDialog(BuildContext context, String message) async {
+    JsConfirmResponseAction action;
+
+    await showDialog(
+      context: context,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          content: Text(message),
+          actions: <Widget>[
+            FlatButton(
+              child: Text("Cancel"),
+              onPressed: () {
+                action = JsConfirmResponseAction.CANCEL;
+                Navigator.of(context).pop();
+              },
+            ),
+            FlatButton(
+              child: Text("Ok"),
+              onPressed: () {
+                action = JsConfirmResponseAction.CONFIRM;
+                Navigator.of(context).pop();
+              },
+            ),
+          ],
+        );
+      },
+    );
+
+    return action;
+  }
+
+  Future<JsPromptResponseAction> createPromptDialog(BuildContext context, String message) async {
+    JsPromptResponseAction action;
+
+    await showDialog(
+      context: context,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          title: Text(message),
+          content: TextField(
+            controller: _textFieldController,
+          ),
+          actions: <Widget>[
+            FlatButton(
+              child: Text("Cancel"),
+              onPressed: () {
+                action = JsPromptResponseAction.CANCEL;
+                Navigator.of(context).pop();
+              },
+            ),
+            FlatButton(
+              child: Text("Ok"),
+              onPressed: () {
+                action = JsPromptResponseAction.CONFIRM;
+                Navigator.of(context).pop();
+              },
+            ),
+          ],
+        );
+      },
+    );
+
+    return action;
+  }
+
   Future<String> _findLocalPath() async {
     final directory = Platform.isAndroid
         ? await getExternalStorageDirectory()
diff --git a/example/lib/webview_example.screen.dart b/example/lib/webview_example.screen.dart
index 73a4332a..54cc3aba 100644
--- a/example/lib/webview_example.screen.dart
+++ b/example/lib/webview_example.screen.dart
@@ -81,10 +81,27 @@ class MyInappBrowser extends InAppBrowser {
  Future<GeolocationPermissionShowPromptResponse> onGeolocationPermissionsShowPrompt(String origin) async {
    print("request Geolocation permission API");
  }
+
+ @override
+ Future<JsAlertResponse> onJsAlert(String message) async {
+   return new JsAlertResponse(handledByClient: false, message: "coma iam");
+ }
+
+ @override
+ Future<JsConfirmResponse> onJsConfirm(String message) {
+
+ }
+
+ @override
+ Future<JsPromptResponse> onJsPrompt(String message, String defaultValue) {
+
+ }
 }
 
 class WebviewExampleScreen extends StatefulWidget {
   final MyInappBrowser browser = new MyInappBrowser();
+  static BuildContext context = null;
+
   @override
   _WebviewExampleScreenState createState() => new _WebviewExampleScreenState();
 }
@@ -97,17 +114,19 @@ class _WebviewExampleScreenState extends State<WebviewExampleScreen> {
 
   @override
   Widget build(BuildContext context) {
+    WebviewExampleScreen.context = context;
     return new Center(
       child: new RaisedButton(
           onPressed: ()  {
-            widget.browser.open(
-                url: "https://www.google.com/",
-                options: [
-                  InAppWebViewOptions(
-                      useShouldOverrideUrlLoading: true,
-                      useOnLoadResource: true,
-                  )
-                ]
+            widget.browser.openFile(
+              "assets/index.html",
+              //url: "https://www.google.com/",
+              options: [
+                InAppWebViewOptions(
+                    useShouldOverrideUrlLoading: true,
+                    useOnLoadResource: true,
+                )
+              ]
             );
           },
           child: Text("Open Webview Browser")),
diff --git a/ios/Classes/FlutterWebViewController.swift b/ios/Classes/FlutterWebViewController.swift
index 444f9e88..5e090a73 100755
--- a/ios/Classes/FlutterWebViewController.swift
+++ b/ios/Classes/FlutterWebViewController.swift
@@ -44,7 +44,6 @@ public class FlutterWebViewController: NSObject, FlutterPlatformView {
                 do {
                     let jsonData = try JSONSerialization.data(withJSONObject: contentBlockers, options: [])
                     let blockRules = String(data: jsonData, encoding: String.Encoding.utf8)
-                    print(blockRules)
                     WKContentRuleListStore.default().compileContentRuleList(
                         forIdentifier: "ContentBlockingRules",
                         encodedContentRuleList: blockRules) { (contentRuleList, error) in
diff --git a/ios/Classes/InAppWebView.swift b/ios/Classes/InAppWebView.swift
index 7d11ed43..39aa13b7 100755
--- a/ios/Classes/InAppWebView.swift
+++ b/ios/Classes/InAppWebView.swift
@@ -745,63 +745,200 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         }
     }
     
-    public func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String,
-                 initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping () -> Void) {
-
-        let alertController = UIAlertController(title: message, message: nil,
+    fileprivate func createAlertDialog(message: String?, responseMessage: String?, confirmButtonTitle: String?, completionHandler: @escaping () -> Void) {
+        let title = responseMessage != nil && !responseMessage!.isEmpty ? responseMessage : message
+        let okButton = confirmButtonTitle != nil && !confirmButtonTitle!.isEmpty ? confirmButtonTitle : NSLocalizedString("Ok", comment: "")
+        let alertController = UIAlertController(title: title, message: nil,
                                                 preferredStyle: UIAlertController.Style.alert);
-
-        alertController.addAction(UIAlertAction(title: "OK", style: UIAlertAction.Style.default) {
+        
+        alertController.addAction(UIAlertAction(title: okButton, style: UIAlertAction.Style.default) {
             _ in completionHandler()}
         );
         
-        let presentingViewController = ((IABController != nil) ? IABController! : window!.rootViewController!)
+        let presentingViewController = ((self.IABController != nil) ? self.IABController! : self.window!.rootViewController!)
         presentingViewController.present(alertController, animated: true, completion: {})
     }
     
+    public func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String,
+                 initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping () -> Void) {
+        
+        onJsAlert(message: message, result: {(result) -> Void in
+            if result is FlutterError {
+                print((result as! FlutterError).message)
+                completionHandler()
+            }
+            else if (result as? NSObject) == FlutterMethodNotImplemented {
+                self.createAlertDialog(message: message, responseMessage: nil, confirmButtonTitle: nil, completionHandler: completionHandler)
+            }
+            else {
+                let response: [String: Any]
+                var responseMessage: String?;
+                var confirmButtonTitle: String?;
+                
+                if let r = result {
+                    response = r as! [String: Any]
+                    responseMessage = response["message"] as? String
+                    confirmButtonTitle = response["confirmButtonTitle"] as? String
+                    let handledByClient = response["handledByClient"] as? Bool
+                    if handledByClient != nil, handledByClient! {
+                        var action = response["action"] as? Int
+                        action = action != nil ? action : 1;
+                        switch action {
+                            case 0:
+                                completionHandler()
+                                break
+                            default:
+                                completionHandler()
+                        }
+                        return;
+                    }
+                }
+                
+                self.createAlertDialog(message: message, responseMessage: responseMessage, confirmButtonTitle: confirmButtonTitle, completionHandler: completionHandler)
+            }
+        })
+    }
+    
+    fileprivate func createConfirmDialog(message: String?, responseMessage: String?, confirmButtonTitle: String?, cancelButtonTitle: String?, completionHandler: @escaping (Bool) -> Void) {
+        let dialogMessage = responseMessage != nil && !responseMessage!.isEmpty ? responseMessage : message
+        let okButton = confirmButtonTitle != nil && !confirmButtonTitle!.isEmpty ? confirmButtonTitle : NSLocalizedString("Ok", comment: "")
+        let cancelButton = cancelButtonTitle != nil && !cancelButtonTitle!.isEmpty ? cancelButtonTitle : NSLocalizedString("Cancel", comment: "")
+        
+        let alertController = UIAlertController(title: nil, message: dialogMessage, preferredStyle: .alert)
+        
+        alertController.addAction(UIAlertAction(title: okButton, style: .default, handler: { (action) in
+            completionHandler(true)
+        }))
+        
+        alertController.addAction(UIAlertAction(title: cancelButton, style: .cancel, handler: { (action) in
+            completionHandler(false)
+        }))
+        
+        let presentingViewController = ((self.IABController != nil) ? self.IABController! : self.window!.rootViewController!)
+        presentingViewController.present(alertController, animated: true, completion: nil)
+    }
+    
     public func webView(_ webView: WKWebView, runJavaScriptConfirmPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo,
                  completionHandler: @escaping (Bool) -> Void) {
-
-        let alertController = UIAlertController(title: nil, message: message, preferredStyle: .alert)
-
-        alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
-            completionHandler(true)
-        }))
-
-        alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { (action) in
-            completionHandler(false)
-        }))
-
-        let presentingViewController = ((IABController != nil) ? IABController! : window!.rootViewController!)
-        presentingViewController.present(alertController, animated: true, completion: nil)
+        
+        onJsConfirm(message: message, result: {(result) -> Void in
+            if result is FlutterError {
+                print((result as! FlutterError).message)
+                completionHandler(false)
+            }
+            else if (result as? NSObject) == FlutterMethodNotImplemented {
+                self.createConfirmDialog(message: message, responseMessage: nil, confirmButtonTitle: nil, cancelButtonTitle: nil, completionHandler: completionHandler)
+            }
+            else {
+                let response: [String: Any]
+                var responseMessage: String?;
+                var confirmButtonTitle: String?;
+                var cancelButtonTitle: String?;
+                
+                if let r = result {
+                    response = r as! [String: Any]
+                    responseMessage = response["message"] as? String
+                    confirmButtonTitle = response["confirmButtonTitle"] as? String
+                    cancelButtonTitle = response["cancelButtonTitle"] as? String
+                    let handledByClient = response["handledByClient"] as? Bool
+                    if handledByClient != nil, handledByClient! {
+                        var action = response["action"] as? Int
+                        action = action != nil ? action : 1;
+                        switch action {
+                            case 0:
+                                completionHandler(true)
+                                break
+                            case 1:
+                                completionHandler(false)
+                                break
+                            default:
+                                completionHandler(false)
+                        }
+                        return;
+                    }
+                }
+                self.createConfirmDialog(message: message, responseMessage: responseMessage, confirmButtonTitle: confirmButtonTitle, cancelButtonTitle: cancelButtonTitle, completionHandler: completionHandler)
+            }
+        })
     }
 
 
-    public func webView(_ webView: WKWebView, runJavaScriptTextInputPanelWithPrompt prompt: String, defaultText: String?, initiatedByFrame frame: WKFrameInfo,
-                 completionHandler: @escaping (String?) -> Void) {
-
-        let alertController = UIAlertController(title: nil, message: prompt, preferredStyle: .alert)
-
+    fileprivate func createPromptDialog(message: String, defaultValue: String?, responseMessage: String?, confirmButtonTitle: String?, cancelButtonTitle: String?, value: String?, completionHandler: @escaping (String?) -> Void) {
+        let dialogMessage = responseMessage != nil && !responseMessage!.isEmpty ? responseMessage : message
+        let okButton = confirmButtonTitle != nil && !confirmButtonTitle!.isEmpty ? confirmButtonTitle : NSLocalizedString("Ok", comment: "")
+        let cancelButton = cancelButtonTitle != nil && !cancelButtonTitle!.isEmpty ? cancelButtonTitle : NSLocalizedString("Cancel", comment: "")
+        
+        let alertController = UIAlertController(title: nil, message: dialogMessage, preferredStyle: .alert)
+        
         alertController.addTextField { (textField) in
-            textField.text = defaultText
+            textField.text = defaultValue
         }
-
-        alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
-            if let text = alertController.textFields?.first?.text {
+        
+        alertController.addAction(UIAlertAction(title: okButton, style: .default, handler: { (action) in
+            if let v = value {
+                completionHandler(v)
+            }
+            else if let text = alertController.textFields?.first?.text {
                 completionHandler(text)
             } else {
-                completionHandler(defaultText)
+                completionHandler("")
             }
         }))
-
-        alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { (action) in
+        
+        alertController.addAction(UIAlertAction(title: cancelButton, style: .cancel, handler: { (action) in
             completionHandler(nil)
         }))
-
-        let presentingViewController = ((IABController != nil) ? IABController! : window!.rootViewController!)
+        
+        let presentingViewController = ((self.IABController != nil) ? self.IABController! : self.window!.rootViewController!)
         presentingViewController.present(alertController, animated: true, completion: nil)
     }
     
+    public func webView(_ webView: WKWebView, runJavaScriptTextInputPanelWithPrompt message: String, defaultText defaultValue: String?, initiatedByFrame frame: WKFrameInfo,
+                 completionHandler: @escaping (String?) -> Void) {
+        onJsPrompt(message: message, defaultValue: defaultValue, result: {(result) -> Void in
+            if result is FlutterError {
+                print((result as! FlutterError).message)
+                completionHandler(nil)
+            }
+            else if (result as? NSObject) == FlutterMethodNotImplemented {
+                self.createPromptDialog(message: message, defaultValue: defaultValue, responseMessage: nil, confirmButtonTitle: nil, cancelButtonTitle: nil, value: nil, completionHandler: completionHandler)
+            }
+            else {
+                let response: [String: Any]
+                var responseMessage: String?;
+                var confirmButtonTitle: String?;
+                var cancelButtonTitle: String?;
+                var value: String?;
+                
+                if let r = result {
+                    response = r as! [String: Any]
+                    responseMessage = response["message"] as? String
+                    confirmButtonTitle = response["confirmButtonTitle"] as? String
+                    cancelButtonTitle = response["cancelButtonTitle"] as? String
+                    let handledByClient = response["handledByClient"] as? Bool
+                    value = response["value"] as? String;
+                    if handledByClient != nil, handledByClient! {
+                        var action = response["action"] as? Int
+                        action = action != nil ? action : 1;
+                        switch action {
+                            case 0:
+                                completionHandler(value)
+                                break
+                            case 1:
+                                completionHandler(nil)
+                                break
+                            default:
+                                completionHandler(nil)
+                        }
+                        return;
+                    }
+                }
+                
+                self.createPromptDialog(message: message, defaultValue: defaultValue, responseMessage: responseMessage, confirmButtonTitle: confirmButtonTitle, cancelButtonTitle: cancelButtonTitle, value: value, completionHandler: completionHandler)
+            }
+        })
+    }
+    
     public func scrollViewDidScroll(_ scrollView: UIScrollView) {
         if navigationDelegate != nil {
             let x = Int(scrollView.contentOffset.x / scrollView.contentScaleFactor)
@@ -916,6 +1053,36 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         }
     }
     
+    public func onJsAlert(message: String, result: FlutterResult?) {
+        var arguments: [String: Any] = ["message": message]
+        if IABController != nil {
+            arguments["uuid"] = IABController!.uuid
+        }
+        if let channel = getChannel() {
+            channel.invokeMethod("onJsAlert", arguments: arguments, result: result)
+        }
+    }
+    
+    public func onJsConfirm(message: String, result: FlutterResult?) {
+        var arguments: [String: Any] = ["message": message]
+        if IABController != nil {
+            arguments["uuid"] = IABController!.uuid
+        }
+        if let channel = getChannel() {
+            channel.invokeMethod("onJsConfirm", arguments: arguments, result: result)
+        }
+    }
+    
+    public func onJsPrompt(message: String, defaultValue: String?, result: FlutterResult?) {
+        var arguments: [String: Any] = ["message": message, "defaultValue": defaultValue as Any]
+        if IABController != nil {
+            arguments["uuid"] = IABController!.uuid
+        }
+        if let channel = getChannel() {
+            channel.invokeMethod("onJsPrompt", arguments: arguments, result: result)
+        }
+    }
+    
     public func onConsoleMessage(sourceURL: String, lineNumber: Int, message: String, messageLevel: String) {
         var arguments: [String: Any] = ["sourceURL": sourceURL, "lineNumber": lineNumber, "message": message, "messageLevel": messageLevel]
         if IABController != nil {
diff --git a/ios/flutter_inappbrowser.podspec b/ios/flutter_inappbrowser.podspec
index 113bd40d..9e129c2c 100755
--- a/ios/flutter_inappbrowser.podspec
+++ b/ios/flutter_inappbrowser.podspec
@@ -18,6 +18,7 @@ A new Flutter plugin.
   s.dependency 'Flutter'
   
   s.ios.deployment_target = '8.0'
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'VALID_ARCHS[sdk=iphonesimulator*]' => 'x86_64' }
   s.swift_version = '5.0'
 end
 
diff --git a/lib/src/in_app_browser.dart b/lib/src/in_app_browser.dart
index e94952c6..94d72da2 100644
--- a/lib/src/in_app_browser.dart
+++ b/lib/src/in_app_browser.dart
@@ -358,6 +358,17 @@ class InAppBrowser {
 
   }
 
+  ///Event that notifies the host application that web content from the specified origin is attempting to use the Geolocation API, but no permission state is currently set for that origin.
+  ///Note that for applications targeting Android N and later SDKs (API level > `Build.VERSION_CODES.M`) this method is only called for requests originating from secure origins such as https.
+  ///On non-secure origins geolocation requests are automatically denied.
+  ///
+  ///[origin] represents the origin of the web content attempting to use the Geolocation API.
+  ///
+  ///**NOTE**: available only for Android.
+  Future<GeolocationPermissionShowPromptResponse> onGeolocationPermissionsShowPrompt (String origin) {
+
+  }
+
   ///Event fires when javascript calls the `alert()` method to display an alert dialog.
   ///If [JsAlertResponse.handledByClient] is `true`, the webview will assume that the client will handle the dialog.
   ///
@@ -383,17 +394,6 @@ class InAppBrowser {
 
   }
 
-  ///Event that notifies the host application that web content from the specified origin is attempting to use the Geolocation API, but no permission state is currently set for that origin.
-  ///Note that for applications targeting Android N and later SDKs (API level > `Build.VERSION_CODES.M`) this method is only called for requests originating from secure origins such as https.
-  ///On non-secure origins geolocation requests are automatically denied.
-  ///
-  ///[origin] represents the origin of the web content attempting to use the Geolocation API.
-  ///
-  ///**NOTE**: available only for Android.
-  Future<GeolocationPermissionShowPromptResponse> onGeolocationPermissionsShowPrompt (String origin) {
-
-  }
-
   void throwIsAlreadyOpened({String message = ''}) {
     if (this.isOpened()) {
       throw Exception(['Error: ${ (message.isEmpty) ? '' : message + ' '}The browser is already opened.']);
diff --git a/lib/src/in_app_webview.dart b/lib/src/in_app_webview.dart
index b190d5bf..7d10465d 100644
--- a/lib/src/in_app_webview.dart
+++ b/lib/src/in_app_webview.dart
@@ -428,31 +428,31 @@ class InAppWebViewController {
       case "onGeolocationPermissionsShowPrompt":
         String origin = call.arguments["origin"];
         if (_widget != null && _widget.onGeolocationPermissionsShowPrompt != null)
-          return (await _widget.onGeolocationPermissionsShowPrompt(this, origin)).toMap();
+          return (await _widget.onGeolocationPermissionsShowPrompt(this, origin))?.toMap();
         else if (_inAppBrowser != null)
-          return (await _inAppBrowser.onGeolocationPermissionsShowPrompt(origin)).toMap();
+          return (await _inAppBrowser.onGeolocationPermissionsShowPrompt(origin))?.toMap();
         break;
       case "onJsAlert":
         String message = call.arguments["message"];
         if (_widget != null && _widget.onJsAlert != null)
-          return (await _widget.onJsAlert(this, message)).toMap();
+          return (await _widget.onJsAlert(this, message))?.toMap();
         else if (_inAppBrowser != null)
-          return (await _inAppBrowser.onJsAlert(message)).toMap();
+          return (await _inAppBrowser.onJsAlert(message))?.toMap();
         break;
       case "onJsConfirm":
         String message = call.arguments["message"];
         if (_widget != null && _widget.onJsConfirm != null)
-          return (await _widget.onJsConfirm(this, message)).toMap();
+          return (await _widget.onJsConfirm(this, message))?.toMap();
         else if (_inAppBrowser != null)
-          return (await _inAppBrowser.onJsConfirm(message)).toMap();
+          return (await _inAppBrowser.onJsConfirm(message))?.toMap();
         break;
       case "onJsPrompt":
         String message = call.arguments["message"];
         String defaultValue = call.arguments["defaultValue"];
         if (_widget != null && _widget.onJsPrompt != null)
-          return (await _widget.onJsPrompt(this, message, defaultValue)).toMap();
+          return (await _widget.onJsPrompt(this, message, defaultValue))?.toMap();
         else if (_inAppBrowser != null)
-          return (await _inAppBrowser.onJsPrompt(message, defaultValue)).toMap();
+          return (await _inAppBrowser.onJsPrompt(message, defaultValue))?.toMap();
         break;
       case "onCallJsHandler":
         String handlerName = call.arguments["handlerName"];