updated management of Content Worlds, updated evaluateJavascript API

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/ContentBlocker/ContentBlockerHandler.java

@@ -166,7 +166,7 @@ public class ContentBlockerHandler {
                             @Override
                             public void run() {
                                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-                                    webView.evaluateJavascript(jsScript, (MethodChannel.Result) null);
+                                    webView.evaluateJavascript(jsScript, null);
                                 } else {
                                     webView.loadUrl("javascript:" + jsScript);
                                 }

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebView/InAppWebView.java

@@ -16,6 +16,7 @@ import android.os.Message;
 import android.print.PrintAttributes;
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
+import android.util.ArraySet;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.ActionMode;
@@ -42,6 +43,7 @@ import android.widget.HorizontalScrollView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
+import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 import androidx.webkit.WebViewCompat;
 import androidx.webkit.WebViewFeature;
@@ -56,14 +58,19 @@ import com.pichillilorenzo.flutter_inappwebview.R;
 import com.pichillilorenzo.flutter_inappwebview.Shared;
 import com.pichillilorenzo.flutter_inappwebview.Util;
 
+import org.json.JSONException;
+import org.json.JSONObject;
+
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.security.cert.CertificateEncodingException;
 import java.security.cert.X509Certificate;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.regex.Pattern;
 
 import io.flutter.plugin.common.MethodChannel;
@@ -106,8 +113,12 @@ final public class InAppWebView extends InputAwareWebView {
   public Runnable checkContextMenuShouldBeClosedTask;
   public int newCheckContextMenuShouldBeClosedTaskTask = 100; // ms
 
+  public Set<String> userScriptsContentWorlds = new HashSet<String>() {{
+    add("page");
+  }};
+
   static final String pluginScriptsWrapperJS = "(function(){" +
-          "  if (window." + JavaScriptBridgeInterface.name + "._pluginScriptsLoaded == null || !window." + JavaScriptBridgeInterface.name + "._pluginScriptsLoaded) {" +
+          "  if (window." + JavaScriptBridgeInterface.name + " == null || window." + JavaScriptBridgeInterface.name + "._pluginScriptsLoaded == null || !window." + JavaScriptBridgeInterface.name + "._pluginScriptsLoaded) {" +
           "    $PLACEHOLDER_VALUE" +
           "    window." + JavaScriptBridgeInterface.name + "._pluginScriptsLoaded = true;" +
           "  }" +
@@ -187,8 +198,8 @@ final public class InAppWebView extends InputAwareWebView {
           "  }" +
           "})();";
 
-  static final String variableForOnLoadResourceJS = "window._flutter_inappwebview_useOnLoadResource";
+  static final String variableForOnLoadResourceJS = "_flutter_inappwebview_useOnLoadResource";
-  static final String enableVariableForOnLoadResourceJS = variableForOnLoadResourceJS + " = $PLACEHOLDER_VALUE;";
+  static final String enableVariableForOnLoadResourceJS = "window." + variableForOnLoadResourceJS + " = $PLACEHOLDER_VALUE;";
 
   static final String resourceObserverJS = "(function() {" +
           "   var observer = new PerformanceObserver(function(list) {" +
@@ -1169,7 +1180,9 @@ final public class InAppWebView extends InputAwareWebView {
       String placeholderValue = newOptions.useShouldInterceptAjaxRequest ? "true" : "false";
       String sourceJs = InAppWebView.enableVariableForShouldInterceptAjaxRequestJS.replace("$PLACEHOLDER_VALUE", placeholderValue);
       if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-        evaluateJavascript(sourceJs, (ValueCallback<String>) null);
+        for (String contentWorldName : userScriptsContentWorlds) {
+          evaluateJavascript(sourceJs, contentWorldName, null);
+        }
       } else {
         loadUrl("javascript:" + sourceJs);
       }
@@ -1179,7 +1192,9 @@ final public class InAppWebView extends InputAwareWebView {
       String placeholderValue = newOptions.useShouldInterceptFetchRequest ? "true" : "false";
       String sourceJs = InAppWebView.enableVariableForShouldInterceptFetchRequestsJS.replace("$PLACEHOLDER_VALUE", placeholderValue);
       if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-        evaluateJavascript(sourceJs, (ValueCallback<String>) null);
+        for (String contentWorldName : userScriptsContentWorlds) {
+          evaluateJavascript(sourceJs, contentWorldName, null);
+        }
       } else {
         loadUrl("javascript:" + sourceJs);
       }
@@ -1457,7 +1472,7 @@ final public class InAppWebView extends InputAwareWebView {
     return (options != null) ? options.getRealOptions(this) : null;
   }
 
-  public void injectDeferredObject(String source, String jsWrapper, final MethodChannel.Result result) {
+  public void injectDeferredObject(String source, @Nullable final String contentWorldName, String jsWrapper, final MethodChannel.Result result) {
     String scriptToInject = source;
     if (jsWrapper != null) {
       org.json.JSONArray jsonEsc = new org.json.JSONArray();
@@ -1472,39 +1487,58 @@ final public class InAppWebView extends InputAwareWebView {
       public void run() {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
           // This action will have the side-effect of blurring the currently focused element
-          loadUrl("javascript:" + finalScriptToInject);
+          loadUrl("javascript:" + finalScriptToInject.replaceAll("[\r\n]+", ""));
           result.success("");
         } else {
-          evaluateJavascript(finalScriptToInject, new ValueCallback<String>() {
+          if (contentWorldName != null && !contentWorldName.equals("page")) {
-            @Override
+            String sourceToInject = finalScriptToInject;
-            public void onReceiveValue(String s) {
+            if (!userScriptsContentWorlds.contains(contentWorldName)) {
-              if (result == null)
+              userScriptsContentWorlds.add(contentWorldName);
-                return;
+              // Add only the first time all the plugin scripts needed.
-              result.success(s);
+              String jsPluginScripts = prepareAndWrapPluginUserScripts();
+              sourceToInject = jsPluginScripts + "\n" + sourceToInject;
             }
-          });
+            sourceToInject = wrapSourceCodeInContentWorld(contentWorldName, sourceToInject);
+            evaluateJavascript(sourceToInject, new ValueCallback<String>() {
+              @Override
+              public void onReceiveValue(String s) {
+                if (result == null)
+                  return;
+                result.success(s);
+              }
+            });
+          } else {
+            evaluateJavascript(finalScriptToInject, new ValueCallback<String>() {
+              @Override
+              public void onReceiveValue(String s) {
+                if (result == null)
+                  return;
+                result.success(s);
+              }
+            });
+          }
         }
       }
     });
   }
 
-  public void evaluateJavascript(String source, MethodChannel.Result result) {
+  public void evaluateJavascript(String source, String contentWorldName, MethodChannel.Result result) {
-    injectDeferredObject(source, null, result);
+    injectDeferredObject(source, contentWorldName, null, result);
   }
 
   public void injectJavascriptFileFromUrl(String urlFile) {
     String jsWrapper = "(function(d) { var c = d.createElement('script'); c.src = %s; d.body.appendChild(c); })(document);";
-    injectDeferredObject(urlFile, jsWrapper, null);
+    injectDeferredObject(urlFile, null, jsWrapper, null);
   }
 
   public void injectCSSCode(String source) {
     String jsWrapper = "(function(d) { var c = d.createElement('style'); c.innerHTML = %s; d.body.appendChild(c); })(document);";
-    injectDeferredObject(source, jsWrapper, null);
+    injectDeferredObject(source, null, jsWrapper, null);
   }
 
   public void injectCSSFileFromUrl(String urlFile) {
     String jsWrapper = "(function(d) { var c = d.createElement('link'); c.rel='stylesheet'; c.type='text/css'; c.href = %s; d.head.appendChild(c); })(document);";
-    injectDeferredObject(urlFile, jsWrapper, null);
+    injectDeferredObject(urlFile, null, jsWrapper, null);
   }
 
   public HashMap<String, Object> getCopyBackForwardList() {
@@ -1999,6 +2033,10 @@ final public class InAppWebView extends InputAwareWebView {
   }
 
   public boolean addUserScript(Map<String, Object> userScript) {
+    String contentWorldName = (String) userScript.get("contentWorld");
+    if (contentWorldName != null && !userScriptsContentWorlds.contains(contentWorldName)) {
+      userScriptsContentWorlds.add(contentWorldName);
+    }
     return userScripts.add(userScript);
   }
 
@@ -2009,6 +2047,52 @@ final public class InAppWebView extends InputAwareWebView {
   public void removeAllUserScripts() {
     userScripts.clear();
   }
+  
+  public void resetUserScriptsContentWorlds() {
+    userScriptsContentWorlds.clear();
+    userScriptsContentWorlds.add("page");
+  }
+
+  public String prepareAndWrapPluginUserScripts() {
+    String js = JavaScriptBridgeInterface.callHandlerScriptJS;
+    js += InAppWebView.consoleLogJS;
+    if (options.useShouldInterceptAjaxRequest) {
+      js += InAppWebView.interceptAjaxRequestsJS;
+    }
+    if (options.useShouldInterceptFetchRequest) {
+      js += InAppWebView.interceptFetchRequestsJS;
+    }
+    if (options.useOnLoadResource) {
+      js += InAppWebView.resourceObserverJS;
+    }
+    if (!options.useHybridComposition) {
+      js += InAppWebView.checkGlobalKeyDownEventToHideContextMenuJS;
+    }
+    js += InAppWebView.onWindowFocusEventJS;
+    js += InAppWebView.onWindowBlurEventJS;
+    js += InAppWebView.printJS;
+
+    String jsWrapped = InAppWebView.pluginScriptsWrapperJS
+            .replace("$PLACEHOLDER_VALUE", js);
+
+    return jsWrapped;
+  }
+
+  public String wrapSourceCodeInContentWorld(@Nullable String contentWorldName, String source) {
+    JSONObject sourceEncoded = new JSONObject();
+    try {
+      // encode the javascript source in order to escape special chars and quotes
+      sourceEncoded.put("source", source);
+    } catch (JSONException e) {
+      e.printStackTrace();
+    }
+
+    String sourceWrapped = contentWorldName == null || contentWorldName.equals("page") ? source :
+            InAppWebView.contentWorldWrapperJS.replace("$CONTENT_WORLD_NAME", contentWorldName)
+                    .replace("$JSON_SOURCE_ENCODED", sourceEncoded.toString());
+
+    return sourceWrapped;
+  }
 
   @Override
   public void dispose() {

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebView/InAppWebViewClient.java

@@ -26,12 +26,8 @@ import androidx.annotation.RequiresApi;
 import com.pichillilorenzo.flutter_inappwebview.CredentialDatabase.Credential;
 import com.pichillilorenzo.flutter_inappwebview.CredentialDatabase.CredentialDatabase;
 import com.pichillilorenzo.flutter_inappwebview.InAppBrowser.InAppBrowserActivity;
-import com.pichillilorenzo.flutter_inappwebview.JavaScriptBridgeInterface;
 import com.pichillilorenzo.flutter_inappwebview.Util;
 
-import org.json.JSONException;
-import org.json.JSONObject;
-
 import java.io.ByteArrayInputStream;
 import java.net.MalformedURLException;
 import java.net.URI;
@@ -166,10 +162,10 @@ public class InAppWebViewClient extends WebViewClient {
   private void loadCustomJavaScriptOnPageStarted(WebView view) {
     InAppWebView webView = (InAppWebView) view;
 
-    String jsPluginScripts = preparePluginUserScripts(webView);
+    String jsPluginScriptsWrapped = webView.prepareAndWrapPluginUserScripts();
     String jsUserScriptsAtDocumentStart = prepareUserScriptsAtDocumentStart(webView);
 
-    String js = wrapPluginAndUserScripts(jsPluginScripts, jsUserScriptsAtDocumentStart, null);
+    String js = wrapPluginAndUserScripts(jsPluginScriptsWrapped, jsUserScriptsAtDocumentStart, null);
 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
       webView.evaluateJavascript(js, (ValueCallback<String>) null);
@@ -182,11 +178,11 @@ public class InAppWebViewClient extends WebViewClient {
     InAppWebView webView = (InAppWebView) view;
 
     // try to reload also custom scripts if they were not loaded during the onPageStarted event
-    String jsPluginScripts = preparePluginUserScripts(webView);
+    String jsPluginScriptsWrapped = webView.prepareAndWrapPluginUserScripts();
     String jsUserScriptsAtDocumentStart = prepareUserScriptsAtDocumentStart(webView);
     String jsUserScriptsAtDocumentEnd = prepareUserScriptsAtDocumentEnd(webView);
 
-    String js = wrapPluginAndUserScripts(jsPluginScripts, jsUserScriptsAtDocumentStart, jsUserScriptsAtDocumentEnd);
+    String js = wrapPluginAndUserScripts(jsPluginScriptsWrapped, jsUserScriptsAtDocumentStart, jsUserScriptsAtDocumentEnd);
 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
       webView.evaluateJavascript(js, (ValueCallback<String>) null);
@@ -194,57 +190,25 @@ public class InAppWebViewClient extends WebViewClient {
       webView.loadUrl("javascript:" + js.replaceAll("[\r\n]+", ""));
     }
   }
-
+  
-  private String preparePluginUserScripts(InAppWebView webView) {
+  private String prepareUserScripts(InAppWebView webView, int atDocumentInjectionTime) {
-    String js = InAppWebView.consoleLogJS;
-    js += JavaScriptBridgeInterface.callHandlerScriptJS;
-    if (webView.options.useShouldInterceptAjaxRequest) {
-      js += InAppWebView.interceptAjaxRequestsJS;
-    }
-    if (webView.options.useShouldInterceptFetchRequest) {
-      js += InAppWebView.interceptFetchRequestsJS;
-    }
-    if (webView.options.useOnLoadResource) {
-      js += InAppWebView.resourceObserverJS;
-    }
-    if (!webView.options.useHybridComposition) {
-      js += InAppWebView.checkGlobalKeyDownEventToHideContextMenuJS;
-    }
-    js += InAppWebView.onWindowFocusEventJS;
-    js += InAppWebView.onWindowBlurEventJS;
-    js += InAppWebView.printJS;
-
-    return js;
-  }
-
-  private String prepareUserScriptsAtDocumentStart(InAppWebView webView) {
     StringBuilder js = new StringBuilder();
 
     for (Map<String, Object> userScript : webView.userScripts) {
       Integer injectionTime = (Integer) userScript.get("injectionTime");
-      if (injectionTime == null || injectionTime == 0) {
+      if ((injectionTime == null && atDocumentInjectionTime == 0) || (injectionTime != null && injectionTime == atDocumentInjectionTime)) {
         String source = (String) userScript.get("source");
         String contentWorldName = (String) userScript.get("contentWorld");
         if (source != null) {
           if (contentWorldName != null && !contentWorldName.equals("page")) {
-            String jsPluginScripts = preparePluginUserScripts(webView);
+            String jsPluginScripts = webView.prepareAndWrapPluginUserScripts();
             source = jsPluginScripts + "\n" + source;
           }
-
+          if (contentWorldName != null && !webView.userScriptsContentWorlds.contains(contentWorldName)) {
-          JSONObject sourceEncoded = new JSONObject();
+            webView.userScriptsContentWorlds.add(contentWorldName);
-          try {
-            // encode the javascript source in order to escape special chars and quotes
-            sourceEncoded.put("source", source);
-          } catch (JSONException e) {
-            e.printStackTrace();
           }
-
+          String sourceWrapped = webView.wrapSourceCodeInContentWorld(contentWorldName, source);
-          String sourceWrapped = contentWorldName == null || contentWorldName.equals("page") ? source :
+          if (atDocumentInjectionTime == 0 && contentWorldName != null && !contentWorldName.equals("page")) {
-                  InAppWebView.contentWorldWrapperJS.replace("$CONTENT_WORLD_NAME", contentWorldName)
-                          .replace("$CONTENT_WORLD_NAME", contentWorldName)
-                          .replace("$JSON_SOURCE_ENCODED", sourceEncoded.toString());
-
-          if (contentWorldName != null && !contentWorldName.equals("page")) {
             // adds another wrapper because sometimes document.body is not ready and it is undefined, causing an error and not adding the iframe element.
             sourceWrapped = InAppWebView.documentReadyWrapperJS.replace("$PLACEHOLDER_VALUE", sourceWrapped)
                     .replace("$PLACEHOLDER_VALUE", sourceWrapped);
@@ -258,43 +222,15 @@ public class InAppWebViewClient extends WebViewClient {
     return js.toString();
   }
 
+  private String prepareUserScriptsAtDocumentStart(InAppWebView webView) {
+    return prepareUserScripts(webView, 0);
+  }
+
   private String prepareUserScriptsAtDocumentEnd(InAppWebView webView) {
-    StringBuilder js = new StringBuilder();
+    return prepareUserScripts(webView, 1);
-
-    for (Map<String, Object> userScript : webView.userScripts) {
-      Integer injectionTime = (Integer) userScript.get("injectionTime");
-      if (injectionTime != null && injectionTime == 1) {
-        String source = (String) userScript.get("source");
-        String contentWorldName = (String) userScript.get("contentWorld");
-        if (source != null) {
-          if (contentWorldName != null && !contentWorldName.equals("page")) {
-            String jsPluginScripts = preparePluginUserScripts(webView);
-            source = jsPluginScripts + "\n" + source;
-          }
-
-          JSONObject sourceEncoded = new JSONObject();
-          try {
-            // encode the javascript source in order to escape special chars and quotes
-            sourceEncoded.put("source", source);
-          } catch (JSONException e) {
-            e.printStackTrace();
-          }
-
-          String sourceWrapped = contentWorldName == null || contentWorldName.equals("page") ? source :
-                  InAppWebView.contentWorldWrapperJS.replace("$CONTENT_WORLD_NAME", contentWorldName)
-                          .replace("$CONTENT_WORLD_NAME", contentWorldName)
-                          .replace("$JSON_SOURCE_ENCODED", sourceEncoded.toString());
-          js.append(sourceWrapped);
-        }
-      }
-    }
-
-    return js.toString();
   }
   
-  private String wrapPluginAndUserScripts(String jsPluginScripts, @Nullable String jsUserScriptsAtDocumentStart, @Nullable String jsUserScriptsAtDocumentEnd) {
+  private String wrapPluginAndUserScripts(String jsPluginScriptsWrapped, @Nullable String jsUserScriptsAtDocumentStart, @Nullable String jsUserScriptsAtDocumentEnd) {
-    String jsPluginScriptsWrapped = InAppWebView.pluginScriptsWrapperJS
-            .replace("$PLACEHOLDER_VALUE", jsPluginScripts);
     String jsUserScriptsAtDocumentStartWrapped = jsUserScriptsAtDocumentStart == null || jsUserScriptsAtDocumentStart.isEmpty() ? "" :
             InAppWebView.userScriptsAtDocumentStartWrapperJS.replace("$PLACEHOLDER_VALUE", jsUserScriptsAtDocumentStart);
     String jsUserScriptsAtDocumentEndWrapped = jsUserScriptsAtDocumentEnd == null || jsUserScriptsAtDocumentEnd.isEmpty() ? "" :
@@ -305,6 +241,7 @@ public class InAppWebViewClient extends WebViewClient {
   @Override
   public void onPageStarted(WebView view, String url, Bitmap favicon) {
     final InAppWebView webView = (InAppWebView) view;
+    webView.resetUserScriptsContentWorlds();
 
     loadCustomJavaScriptOnPageStarted(webView);
 

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppWebViewMethodHandler.java

@@ -74,7 +74,8 @@ public class InAppWebViewMethodHandler implements MethodChannel.MethodCallHandle
       case "evaluateJavascript":
         if (webView != null) {
           String source = (String) call.argument("source");
-          webView.evaluateJavascript(source, result);
+          String contentWorldName = (String) call.argument("contentWorld");
+          webView.evaluateJavascript(source, contentWorldName, result);
         }
         else {
           result.success(null);

example/.flutter-plugins-dependencies

@@ -1 +1 @@
-{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"android":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"macos":[{"name":"path_provider_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_macos-0.0.4+8/","dependencies":[]},{"name":"url_launcher_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_macos-0.1.0-nullsafety.2/","dependencies":[]}],"linux":[{"name":"path_provider_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_linux-0.0.1+2/","dependencies":[]},{"name":"url_launcher_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_linux-0.1.0-nullsafety.3/","dependencies":[]}],"windows":[{"name":"path_provider_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_windows-0.0.4+3/","dependencies":[]},{"name":"url_launcher_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_windows-0.1.0-nullsafety.2/","dependencies":[]}],"web":[]},"dependencyGraph":[{"name":"device_info","dependencies":[]},{"name":"flutter_downloader","dependencies":[]},{"name":"flutter_inappwebview","dependencies":["device_info"]},{"name":"integration_test","dependencies":[]},{"name":"path_provider","dependencies":["path_provider_macos","path_provider_linux","path_provider_windows"]},{"name":"path_provider_linux","dependencies":[]},{"name":"path_provider_macos","dependencies":[]},{"name":"path_provider_windows","dependencies":[]},{"name":"permission_handler","dependencies":[]},{"name":"url_launcher","dependencies":["url_launcher_linux","url_launcher_macos","url_launcher_windows"]},{"name":"url_launcher_linux","dependencies":[]},{"name":"url_launcher_macos","dependencies":[]},{"name":"url_launcher_windows","dependencies":[]}],"date_created":"2021-02-04 22:05:52.361400","version":"1.26.0-18.0.pre.90"}
+{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"android":[{"name":"device_info","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/device_info-2.0.0-nullsafety.2/","dependencies":[]},{"name":"flutter_downloader","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_downloader-1.5.2/","dependencies":[]},{"name":"flutter_inappwebview","path":"/Users/lorenzopichilli/Desktop/flutter_inappwebview/","dependencies":["device_info"]},{"name":"integration_test","path":"/Users/lorenzopichilli/flutter/.pub-cache/git/plugins-16f3281b04b0db12e609352b1c9544901392e428/packages/integration_test/","dependencies":[]},{"name":"path_provider","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider-1.6.27/","dependencies":[]},{"name":"permission_handler","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/permission_handler-5.0.1+1/","dependencies":[]},{"name":"url_launcher","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher-6.0.0-nullsafety.4/","dependencies":[]}],"macos":[{"name":"path_provider_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_macos-0.0.4+8/","dependencies":[]},{"name":"url_launcher_macos","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_macos-0.1.0-nullsafety.2/","dependencies":[]}],"linux":[{"name":"path_provider_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_linux-0.0.1+2/","dependencies":[]},{"name":"url_launcher_linux","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_linux-0.1.0-nullsafety.3/","dependencies":[]}],"windows":[{"name":"path_provider_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/path_provider_windows-0.0.4+3/","dependencies":[]},{"name":"url_launcher_windows","path":"/Users/lorenzopichilli/flutter/.pub-cache/hosted/pub.dartlang.org/url_launcher_windows-0.1.0-nullsafety.2/","dependencies":[]}],"web":[]},"dependencyGraph":[{"name":"device_info","dependencies":[]},{"name":"flutter_downloader","dependencies":[]},{"name":"flutter_inappwebview","dependencies":["device_info"]},{"name":"integration_test","dependencies":[]},{"name":"path_provider","dependencies":["path_provider_macos","path_provider_linux","path_provider_windows"]},{"name":"path_provider_linux","dependencies":[]},{"name":"path_provider_macos","dependencies":[]},{"name":"path_provider_windows","dependencies":[]},{"name":"permission_handler","dependencies":[]},{"name":"url_launcher","dependencies":["url_launcher_linux","url_launcher_macos","url_launcher_windows"]},{"name":"url_launcher_linux","dependencies":[]},{"name":"url_launcher_macos","dependencies":[]},{"name":"url_launcher_windows","dependencies":[]}],"date_created":"2021-02-06 02:03:14.260971","version":"1.26.0-18.0.pre.90"}

ios/Classes/InAppWebView.swift

@@ -58,7 +58,7 @@ window.\(JAVASCRIPT_BRIDGE_NAME).callHandler = function() {
     return new Promise(function(resolve, reject) {
         window.\(JAVASCRIPT_BRIDGE_NAME)[_callHandlerID] = resolve;
     });
-}
+};
 """
 
 // the message needs to be concatenated with '' in order to have the same behavior like on Android
@@ -269,8 +269,8 @@ function wkwebview_FindNext(forward) {
 }
 """
 
-let variableForOnLoadResourceJS = "window._flutter_inappwebview_useOnLoadResource"
+let variableForOnLoadResourceJS = "_flutter_inappwebview_useOnLoadResource"
-let enableVariableForOnLoadResourceJS = "\(variableForOnLoadResourceJS) = $PLACEHOLDER_VALUE;"
+let enableVariableForOnLoadResourceJS = "window.\(variableForOnLoadResourceJS) = $PLACEHOLDER_VALUE;"
 
 let resourceObserverJS = """
 (function() {
@@ -877,7 +877,7 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
     static var windowWebViews: [Int64:WebViewTransport] = [:]
     static var windowAutoincrementId: Int64 = 0;
     
-    var userScriptsContentWorlds: [String] = ["defaultClient", "page"]
+    var userScriptsContentWorlds: [String] = ["page"]
     
     init(frame: CGRect, configuration: WKWebViewConfiguration, IABController: InAppBrowserWebViewController?, contextMenu: [String: Any]?, channel: FlutterMethodChannel?) {
         super.init(frame: frame, configuration: configuration)
@@ -1219,60 +1219,88 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         configuration.userContentController.addUserScript(userScriptWindowId)
     }
     
-    @available(iOS 14.0, *)
+    func getAllPluginUserScriptMergedJS() -> String {
-    func addSharedPluginUserScriptsBetweenContentWorlds(contentWorlds: [WKContentWorld]) -> Void {
+        var allPluginUserScriptMergedJS = promisePolyfillJS + "\n" +
-        for contentWorld in contentWorlds {
+            javaScriptBridgeJS + "\n" +
-            let promisePolyfillJSScript = WKUserScript(source: promisePolyfillJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+            consoleLogJS + "\n" +
-            configuration.userContentController.addUserScript(promisePolyfillJSScript)
+            printJS + "\n"
+        if let options = options {
+            if options.useShouldInterceptAjaxRequest {
+                allPluginUserScriptMergedJS += interceptAjaxRequestsJS + "\n"
+            }
             
-            let javaScriptBridgeJSScript = WKUserScript(source: javaScriptBridgeJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+            if options.useShouldInterceptFetchRequest {
-            configuration.userContentController.addUserScript(javaScriptBridgeJSScript)
+                allPluginUserScriptMergedJS += interceptFetchRequestsJS + "\n"
-            configuration.userContentController.removeScriptMessageHandler(forName: "callHandler", contentWorld: contentWorld)
-            configuration.userContentController.add(self, contentWorld: contentWorld, name: "callHandler")
-            
-            let consoleLogJSScript = WKUserScript(source: consoleLogJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
-            configuration.userContentController.addUserScript(consoleLogJSScript)
-            configuration.userContentController.removeScriptMessageHandler(forName: "consoleLog", contentWorld: contentWorld)
-            configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleLog")
-            configuration.userContentController.removeScriptMessageHandler(forName: "consoleDebug", contentWorld: contentWorld)
-            configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleDebug")
-            configuration.userContentController.removeScriptMessageHandler(forName: "consoleError", contentWorld: contentWorld)
-            configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleError")
-            configuration.userContentController.removeScriptMessageHandler(forName: "consoleInfo", contentWorld: contentWorld)
-            configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleInfo")
-            configuration.userContentController.removeScriptMessageHandler(forName: "consoleWarn", contentWorld: contentWorld)
-            configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleWarn")
-            
-            if let options = options {
-                if options.useShouldInterceptAjaxRequest {
-                    let interceptAjaxRequestsJSScript = WKUserScript(source: interceptAjaxRequestsJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
-                    configuration.userContentController.addUserScript(interceptAjaxRequestsJSScript)
-                }
-                
-                if options.useShouldInterceptFetchRequest {
-                    let interceptFetchRequestsJSScript = WKUserScript(source: interceptFetchRequestsJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
-                    configuration.userContentController.addUserScript(interceptFetchRequestsJSScript)
-                }
             }
         }
+        return allPluginUserScriptMergedJS
     }
     
-    func addPluginUserScripts() -> Void {
+    @available(iOS 14.0, *)
-        if #available(iOS 14.0, *) {
+    func addSharedPluginUserScriptsInContentWorld(contentWorldName: String) -> Void {
-            let contentWorlds = userScriptsContentWorlds.map { (contentWorldName) -> WKContentWorld in
+        let contentWorld = getContentWorld(name: contentWorldName)
-                return getContentWorld(name: contentWorldName)
+        
+        let promisePolyfillJSScript = WKUserScript(source: promisePolyfillJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+        configuration.userContentController.addUserScript(promisePolyfillJSScript)
+        
+        let javaScriptBridgeJSScript = WKUserScript(source: javaScriptBridgeJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+        configuration.userContentController.addUserScript(javaScriptBridgeJSScript)
+        configuration.userContentController.removeScriptMessageHandler(forName: "callHandler", contentWorld: contentWorld)
+        configuration.userContentController.add(self, contentWorld: contentWorld, name: "callHandler")
+        
+        let consoleLogJSScript = WKUserScript(source: consoleLogJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+        configuration.userContentController.addUserScript(consoleLogJSScript)
+        configuration.userContentController.removeScriptMessageHandler(forName: "consoleLog", contentWorld: contentWorld)
+        configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleLog")
+        configuration.userContentController.removeScriptMessageHandler(forName: "consoleDebug", contentWorld: contentWorld)
+        configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleDebug")
+        configuration.userContentController.removeScriptMessageHandler(forName: "consoleError", contentWorld: contentWorld)
+        configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleError")
+        configuration.userContentController.removeScriptMessageHandler(forName: "consoleInfo", contentWorld: contentWorld)
+        configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleInfo")
+        configuration.userContentController.removeScriptMessageHandler(forName: "consoleWarn", contentWorld: contentWorld)
+        configuration.userContentController.add(self, contentWorld: contentWorld, name: "consoleWarn")
+        
+        if let options = options {
+            if options.useShouldInterceptAjaxRequest {
+                let interceptAjaxRequestsJSScript = WKUserScript(source: interceptAjaxRequestsJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+                configuration.userContentController.addUserScript(interceptAjaxRequestsJSScript)
+            }
+            
+            if options.useShouldInterceptFetchRequest {
+                let interceptFetchRequestsJSScript = WKUserScript(source: interceptFetchRequestsJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+                configuration.userContentController.addUserScript(interceptFetchRequestsJSScript)
+            }
+        }
+        
+        let printJSScript = WKUserScript(source: printJS, injectionTime: .atDocumentStart, forMainFrameOnly: false, in: contentWorld)
+        configuration.userContentController.addUserScript(printJSScript)
+    }
+    
+    func addSharedPluginUserScriptsInContentWorlds() -> Void {
+        if #available(iOS 14.0, *) {
+            for contentWorldName in userScriptsContentWorlds {
+                addSharedPluginUserScriptsInContentWorld(contentWorldName: contentWorldName)
             }
-            addSharedPluginUserScriptsBetweenContentWorlds(contentWorlds: contentWorlds)
         } else {
-            let promisePolyfillJSScript = WKUserScript(source: promisePolyfillJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
+            let promisePolyfillJSScript = WKUserScript(
+                source: promisePolyfillJS,
+                injectionTime: .atDocumentStart,
+                forMainFrameOnly: false)
             configuration.userContentController.addUserScript(promisePolyfillJSScript)
             
-            let javaScriptBridgeJSScript = WKUserScript(source: javaScriptBridgeJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
+            let javaScriptBridgeJSScript = WKUserScript(
+                source: javaScriptBridgeJS,
+                injectionTime: .atDocumentStart,
+                forMainFrameOnly: false)
             configuration.userContentController.addUserScript(javaScriptBridgeJSScript)
             configuration.userContentController.removeScriptMessageHandler(forName: "callHandler")
             configuration.userContentController.add(self, name: "callHandler")
             
-            let consoleLogJSScript = WKUserScript(source: consoleLogJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
+            let consoleLogJSScript = WKUserScript(
+                source: consoleLogJS,
+                injectionTime: .atDocumentStart,
+                forMainFrameOnly: false)
             configuration.userContentController.addUserScript(consoleLogJSScript)
             configuration.userContentController.removeScriptMessageHandler(forName: "consoleLog")
             configuration.userContentController.add(self, name: "consoleLog")
@@ -1287,23 +1315,33 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
             
             if let options = options {
                 if options.useShouldInterceptAjaxRequest {
-                    let interceptAjaxRequestsJSScript = WKUserScript(source: interceptAjaxRequestsJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
+                    let interceptAjaxRequestsJSScript = WKUserScript(
+                        source: interceptAjaxRequestsJS,
+                        injectionTime: .atDocumentStart,
+                        forMainFrameOnly: false)
                     configuration.userContentController.addUserScript(interceptAjaxRequestsJSScript)
                 }
                 
                 if options.useShouldInterceptFetchRequest {
-                    let interceptFetchRequestsJSScript = WKUserScript(source: interceptFetchRequestsJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
+                    let interceptFetchRequestsJSScript = WKUserScript(
+                        source: interceptFetchRequestsJS,
+                        injectionTime: .atDocumentStart,
+                        forMainFrameOnly: false)
                     configuration.userContentController.addUserScript(interceptFetchRequestsJSScript)
                 }
             }
+            
+            let printJSScript = WKUserScript(source: printJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
+            configuration.userContentController.addUserScript(printJSScript)
         }
+    }
+    
+    func addPluginUserScripts() -> Void {
+        addSharedPluginUserScriptsInContentWorlds()
         
         let findElementsAtPointJSScript = WKUserScript(source: findElementsAtPointJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
         configuration.userContentController.addUserScript(findElementsAtPointJSScript)
         
-        let printJSScript = WKUserScript(source: printJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
-        configuration.userContentController.addUserScript(printJSScript)
-        
         let lastTouchedAnchorOrImageJSScript = WKUserScript(source: lastTouchedAnchorOrImageJS, injectionTime: .atDocumentStart, forMainFrameOnly: false)
         configuration.userContentController.addUserScript(lastTouchedAnchorOrImageJSScript)
         
@@ -1352,18 +1390,19 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
     
     public func appendUserScript(userScript: [String: Any]) -> Void {
         var wkUserScript: WKUserScript?
-        if #available(iOS 14.0, *), let contentWorldName = userScript["contentWorld"] as? String {
+        let contentWorldName = userScript["contentWorld"] as? String
-            if !userScriptsContentWorlds.contains(contentWorldName) {
+        if contentWorldName != nil, !userScriptsContentWorlds.contains(contentWorldName!) {
-                userScriptsContentWorlds.append(contentWorldName)
+            userScriptsContentWorlds.append(contentWorldName!)
-            }
+        }
+        if #available(iOS 14.0, *), let contentWorldName = contentWorldName {
             wkUserScript = WKUserScript(source: userScript["source"] as! String,
                                             injectionTime: WKUserScriptInjectionTime.init(rawValue: userScript["injectionTime"] as! Int) ?? .atDocumentStart,
                                             forMainFrameOnly: userScript["iosForMainFrameOnly"] as! Bool,
                                             in: getContentWorld(name: contentWorldName))
         } else {
             wkUserScript = WKUserScript(source: userScript["source"] as! String,
-                                            injectionTime: WKUserScriptInjectionTime.init(rawValue: userScript["injectionTime"] as! Int) ?? .atDocumentStart,
+                                        injectionTime: WKUserScriptInjectionTime.init(rawValue: userScript["injectionTime"] as! Int) ?? .atDocumentStart,
-                                            forMainFrameOnly: userScript["iosForMainFrameOnly"] as! Bool)
+                                        forMainFrameOnly: userScript["iosForMainFrameOnly"] as! Bool)
         }
         userScripts.append(wkUserScript!)
     }
@@ -1784,17 +1823,35 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         
         if newOptionsMap["useOnLoadResource"] != nil && options?.useOnLoadResource != newOptions.useOnLoadResource && newOptions.useOnLoadResource {
             let placeholderValue = newOptions.useOnLoadResource ? "true" : "false"
-            evaluateJavaScript(enableVariableForOnLoadResourceJS.replacingOccurrences(of: "$PLACEHOLDER_VALUE", with: placeholderValue), completionHandler: nil)
+            let source = enableVariableForOnLoadResourceJS.replacingOccurrences(of: "$PLACEHOLDER_VALUE", with: placeholderValue)
+            evaluateJavaScript(source, completionHandler: nil)
         }
         
         if newOptionsMap["useShouldInterceptAjaxRequest"] != nil && options?.useShouldInterceptAjaxRequest != newOptions.useShouldInterceptAjaxRequest && newOptions.useShouldInterceptAjaxRequest {
             let placeholderValue = newOptions.useShouldInterceptAjaxRequest ? "true" : "false"
-            evaluateJavaScript(enableVariableForShouldInterceptAjaxRequestJS.replacingOccurrences(of: "$PLACEHOLDER_VALUE", with: placeholderValue), completionHandler: nil)
+            let source = enableVariableForShouldInterceptAjaxRequestJS.replacingOccurrences(of: "$PLACEHOLDER_VALUE", with: placeholderValue)
+            if #available(iOS 14.0, *) {
+                for contentWorldName in userScriptsContentWorlds {
+                    let contentWorld = getContentWorld(name: contentWorldName)
+                    evaluateJavaScript(source, in: nil, in: contentWorld, completionHandler: nil)
+                }
+            } else {
+                evaluateJavaScript(source, completionHandler: nil)
+            }
         }
         
         if newOptionsMap["useShouldInterceptFetchRequest"] != nil && options?.useShouldInterceptFetchRequest != newOptions.useShouldInterceptFetchRequest && newOptions.useShouldInterceptFetchRequest {
             let placeholderValue = newOptions.useShouldInterceptFetchRequest ? "true" : "false"
-            evaluateJavaScript(enableVariableForShouldInterceptFetchRequestsJS.replacingOccurrences(of: "$PLACEHOLDER_VALUE", with: placeholderValue), completionHandler: nil)
+
+            let source = enableVariableForShouldInterceptAjaxRequestJS.replacingOccurrences(of: "$PLACEHOLDER_VALUE", with: placeholderValue)
+            if #available(iOS 14.0, *) {
+                for contentWorldName in userScriptsContentWorlds {
+                    let contentWorld = getContentWorld(name: contentWorldName)
+                    evaluateJavaScript(source, in: nil, in: contentWorld, completionHandler: nil)
+                }
+            } else {
+                evaluateJavaScript(source, completionHandler: nil)
+            }
         }
         
         if newOptionsMap["mediaPlaybackRequiresUserGesture"] != nil && options?.mediaPlaybackRequiresUserGesture != newOptions.mediaPlaybackRequiresUserGesture {
@@ -2000,7 +2057,7 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         }
     }
     
-    public func injectDeferredObject(source: String, withWrapper jsWrapper: String?, result: FlutterResult?) {
+    public func injectDeferredObject(source: String,  contentWorldName: String?, withWrapper jsWrapper: String?, result: FlutterResult?) {
         var jsToInject = source
         if let wrapper = jsWrapper {
             let jsonData: Data? = try? JSONSerialization.data(withJSONObject: [source], options: [])
@@ -2008,42 +2065,71 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
             let sourceString: String? = (sourceArrayString! as NSString).substring(with: NSRange(location: 1, length: (sourceArrayString?.count ?? 0) - 2))
             jsToInject = String(format: wrapper, sourceString!)
         }
-        evaluateJavaScript(jsToInject, completionHandler: {(value, error) in
+        
-            if result == nil {
+        if #available(iOS 14.0, *), let contentWorldName = contentWorldName {
-                return
+            if !userScriptsContentWorlds.contains(contentWorldName) {
+                userScriptsContentWorlds.append(contentWorldName)
+                addSharedPluginUserScriptsInContentWorld(contentWorldName: contentWorldName)
+                // Add only the first time all the plugin user scripts needed.
+                // In the next page load, it will use the WKUserScripts loaded
+                jsToInject = getAllPluginUserScriptMergedJS() + "\n" + jsToInject
             }
-            
+            let contentWorld = getContentWorld(name: contentWorldName)
-            if error != nil {
+            evaluateJavaScript(jsToInject, in: nil, in: contentWorld) { (evalResult) in
-                let userInfo = (error! as NSError).userInfo
+                guard let result = result else {
-                self.onConsoleMessage(message: userInfo["WKJavaScriptExceptionMessage"] as? String ?? "", messageLevel: 3)
+                    return
+                }
+                
+                switch (evalResult) {
+                case .success(let value):
+                    result(value)
+                    return
+                case .failure(let error):
+                    let userInfo = (error as NSError).userInfo
+                    self.onConsoleMessage(message: userInfo["WKJavaScriptExceptionMessage"] as? String ?? "", messageLevel: 3)
+                    break
+                }
+                
+                result(nil)
             }
-            
+        } else {
-            if value == nil {
+            evaluateJavaScript(jsToInject) { (value, error) in
-                result!(nil)
+                guard let result = result else {
-                return
+                    return
+                }
+                
+                if error != nil {
+                    let userInfo = (error! as NSError).userInfo
+                    self.onConsoleMessage(message: userInfo["WKJavaScriptExceptionMessage"] as? String ?? "", messageLevel: 3)
+                }
+                
+                if value == nil {
+                    result(nil)
+                    return
+                }
+                
+                result(value)
             }
-            
+        }
-            result!(value)
-        })
     }
     
-    public func evaluateJavascript(source: String, result: FlutterResult?) {
+    public func evaluateJavascript(source: String, contentWorldName: String?, result: FlutterResult?) {
-        injectDeferredObject(source: source, withWrapper: nil, result: result)
+        injectDeferredObject(source: source, contentWorldName: contentWorldName, withWrapper: nil, result: result)
     }
     
     public func injectJavascriptFileFromUrl(urlFile: String) {
         let jsWrapper = "(function(d) { var c = d.createElement('script'); c.src = %@; d.body.appendChild(c); })(document);"
-        injectDeferredObject(source: urlFile, withWrapper: jsWrapper, result: nil)
+        injectDeferredObject(source: urlFile, contentWorldName: nil, withWrapper: jsWrapper, result: nil)
     }
     
     public func injectCSSCode(source: String) {
         let jsWrapper = "(function(d) { var c = d.createElement('style'); c.innerHTML = %@; d.body.appendChild(c); })(document);"
-        injectDeferredObject(source: source, withWrapper: jsWrapper, result: nil)
+        injectDeferredObject(source: source, contentWorldName: nil, withWrapper: jsWrapper, result: nil)
     }
     
     public func injectCSSFileFromUrl(urlFile: String) {
         let jsWrapper = "(function(d) { var c = d.createElement('link'); c.rel='stylesheet', c.type='text/css'; c.href = %@; d.body.appendChild(c); })(document);"
-        injectDeferredObject(source: urlFile, withWrapper: jsWrapper, result: nil)
+        injectDeferredObject(source: urlFile, contentWorldName: nil, withWrapper: jsWrapper, result: nil)
     }
     
     public func getCopyBackForwardList() -> [String: Any] {
@@ -2181,6 +2267,7 @@ public class InAppWebView: WKWebView, UIScrollViewDelegate, WKUIDelegate, WKNavi
         currentURL = url
         InAppWebView.credentialsProposed = []
         evaluateJavaScript(platformReadyJS, completionHandler: nil)
+
         onLoadStop(url: url?.absoluteString)
         
         if IABController != nil {

ios/Classes/InAppWebViewMethodHandler.swift

@@ -30,15 +30,15 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                 result( (webView != nil) ? Int(webView!.estimatedProgress * 100) : nil )
                 break
             case "loadUrl":
-                let url = (arguments!["url"] as? String)!
+                let url = arguments!["url"] as! String
-                let headers = (arguments!["headers"] as? [String: String])!
+                let headers = arguments!["headers"] as! [String: String]
                 webView?.loadUrl(url: URL(string: url)!, headers: headers)
                 result(true)
                 break
             case "postUrl":
                 if webView != nil {
-                    let url = (arguments!["url"] as? String)!
+                    let url = arguments!["url"] as! String
-                    let postData = (arguments!["postData"] as? FlutterStandardTypedData)!
+                    let postData = arguments!["postData"] as! FlutterStandardTypedData
                     webView!.postUrl(url: URL(string: url)!, postData: postData.data, completionHandler: { () -> Void in
                         result(true)
                     })
@@ -48,16 +48,16 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                 }
                 break
             case "loadData":
-                let data = (arguments!["data"] as? String)!
+                let data = arguments!["data"] as! String
-                let mimeType = (arguments!["mimeType"] as? String)!
+                let mimeType = arguments!["mimeType"] as! String
-                let encoding = (arguments!["encoding"] as? String)!
+                let encoding = arguments!["encoding"] as! String
-                let baseUrl = (arguments!["baseUrl"] as? String)!
+                let baseUrl = arguments!["baseUrl"] as! String
                 webView?.loadData(data: data, mimeType: mimeType, encoding: encoding, baseUrl: baseUrl)
                 result(true)
                 break
             case "loadFile":
-                let url = (arguments!["url"] as? String)!
+                let url = arguments!["url"] as! String
-                let headers = (arguments!["headers"] as? [String: String])!
+                let headers = arguments!["headers"] as! [String: String]
                 
                 do {
                     try webView?.loadFile(url: url, headers: headers)
@@ -70,25 +70,26 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                 break
             case "evaluateJavascript":
                 if webView != nil {
-                    let source = (arguments!["source"] as? String)!
+                    let source = arguments!["source"] as! String
-                    webView!.evaluateJavascript(source: source, result: result)
+                    let contentWorldName = arguments!["contentWorld"] as? String
+                    webView!.evaluateJavascript(source: source, contentWorldName: contentWorldName, result: result)
                 }
                 else {
                     result(nil)
                 }
                 break
             case "injectJavascriptFileFromUrl":
-                let urlFile = (arguments!["urlFile"] as? String)!
+                let urlFile = arguments!["urlFile"] as! String
                 webView?.injectJavascriptFileFromUrl(urlFile: urlFile)
                 result(true)
                 break
             case "injectCSSCode":
-                let source = (arguments!["source"] as? String)!
+                let source = arguments!["source"] as! String
                 webView?.injectCSSCode(source: source)
                 result(true)
                 break
             case "injectCSSFileFromUrl":
-                let urlFile = (arguments!["urlFile"] as? String)!
+                let urlFile = arguments!["urlFile"] as! String
                 webView?.injectCSSFileFromUrl(urlFile: urlFile)
                 result(true)
                 break
@@ -111,12 +112,12 @@ class InAppWebViewMethodHandler: FlutterMethodCallDelegate {
                 result(webView?.canGoForward ?? false)
                 break
             case "goBackOrForward":
-                let steps = (arguments!["steps"] as? Int)!
+                let steps = arguments!["steps"] as! Int
                 webView?.goBackOrForward(steps: steps)
                 result(true)
                 break
             case "canGoBackOrForward":
-                let steps = (arguments!["steps"] as? Int)!
+                let steps = arguments!["steps"] as! Int
                 result(webView?.canGoBackOrForward(steps: steps) ?? false)
                 break
             case "stopLoading":

lib/src/in_app_webview_controller.dart

@@ -1351,7 +1351,14 @@ class InAppWebViewController {
     await _channel.invokeMethod('stopLoading', args);
   }
 
-  ///Evaluates JavaScript code into the WebView and returns the result of the evaluation.
+  ///Evaluates JavaScript [source] code into the WebView and returns the result of the evaluation.
+  ///
+  ///[contentWorld], on iOS, it represents the namespace in which to evaluate the JavaScript [source] code.
+  ///Instead, on Android, it will run the [source] code into an iframe.
+  ///This parameter doesn’t apply to changes you make to the underlying web content, such as the document’s DOM structure.
+  ///Those changes remain visible to all scripts, regardless of which content world you specify.
+  ///For more information about content worlds, see [ContentWorld].
+  ///Available on iOS 14.0+.
   ///
   ///**NOTE**: This method shouldn't be called in the [WebView.onWebViewCreated] or [WebView.onLoadStart] events,
   ///because, in these events, the [WebView] is not ready to handle it yet.
@@ -1360,10 +1367,13 @@ class InAppWebViewController {
   ///
   ///**Official Android API**: https://developer.android.com/reference/android/webkit/WebView#evaluateJavascript(java.lang.String,%20android.webkit.ValueCallback%3Cjava.lang.String%3E)
   ///
-  ///**Official iOS API**: https://developer.apple.com/documentation/webkit/wkwebview/1415017-evaluatejavascript
+  ///**Official iOS API**:
-  Future<dynamic> evaluateJavascript({required String source}) async {
+  ///- https://developer.apple.com/documentation/webkit/wkwebview/1415017-evaluatejavascript
+  ///- https://developer.apple.com/documentation/webkit/wkwebview/3656442-evaluatejavascript
+  Future<dynamic> evaluateJavascript({required String source, ContentWorld? contentWorld}) async {
     Map<String, dynamic> args = <String, dynamic>{};
     args.putIfAbsent('source', () => source);
+    args.putIfAbsent('contentWorld', () => contentWorld?.name);
     var data = await _channel.invokeMethod('evaluateJavascript', args);
     if (data != null && defaultTargetPlatform == TargetPlatform.android) data = json.decode(data);
     return data;

lib/src/types.dart

@@ -4599,12 +4599,15 @@ class UserScript {
 
 ///Class that represents an object that defines a scope of execution for JavaScript code, and which you use to prevent conflicts between different scripts.
 ///
-///**NOTE for iOS 14.0+**: this class represents the native [WKContentWorld](https://developer.apple.com/documentation/webkit/wkcontentworld) class.
+///**NOTE for iOS**: available on iOS 14.0+. This class represents the native [WKContentWorld](https://developer.apple.com/documentation/webkit/wkcontentworld) class.
 ///
-///**NOTE for Android**: it will create and append an `<iframe>` HTML element with `id` equals to `flutter_inappwebview_[name]` to the webpage's content that contains only the scripts
+///**NOTE for Android**: it will create and append an `<iframe>` HTML element with `id` equals to `flutter_inappwebview_[name]`
-///in order to define a new scope of execution for JavaScript code. Unfortunately, there isn't any other way to do it.
+///to the webpage's content that contains only the inline `<script>` HTML elements in order to define a new scope of execution for JavaScript code.
-///For any [ContentWorld], except [ContentWorld.page], if you need to access to the `window` or `document` global Object,
+///Unfortunately, there isn't any other way to do it.
-///you need to use `window.top` and `window.top.document` because the code runs inside an `<iframe>`.
+///There are some limitations:
+///- for any [ContentWorld], except [ContentWorld.page] (that is the webpage itself), if you need to access to the `window` or `document` global Object,
+///you need to use `window.top` and `window.top.document` because the code runs inside an `<iframe>`;
+///- also, the execution of the inline `<script>` could be blocked by the `Content-Security-Policy` header.
 class ContentWorld {
   ///The name of a custom content world.
   final String name;