updated DropDown workaround: load it as soon as possible and load also for...

updated DropDown workaround: load it as soon as possible and load also for iframes where possibile (same origin)

.idea/misc.xml

@@ -35,7 +35,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Android API 24 Platform" project-jdk-type="Android SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Android API 28 Platform" project-jdk-type="Android SDK" />
   <component name="ProjectType">
     <option name="id" value="io.flutter" />
   </component>

README.md

@@ -410,7 +410,7 @@ Instead, on the `onLoadStop` WebView event, you can use `callHandler` directly:
 * `hardwareAcceleration`: Boolean value to enable Hardware Acceleration in the WebView.
 * `supportMultipleWindows`: Sets whether the WebView whether supports multiple windows.
 * `regexToCancelSubFramesLoading`: Regular expression used by `shouldOverrideUrlLoading` event to cancel navigation for frames that are not the main frame. If the url request of a subframe matches the regular expression, then the request of that subframe is canceled.
-* `dropDownWorkaroundEnabled`: Enable a temporary workaround for html dropdowns (`<select>` tags) (available on Android 19+). It requires **JavaScript enabled**. It attempts to block click events for the dropdowns creating a custom `<div>` layer over the dropdown to intercept user's clicks. The default value is `false`.
+* `dropDownWorkaroundEnabled`: Enable a temporary workaround for html dropdowns (`<select>` tags) (available on Android 19+). It requires **JavaScript enabled**. It attempts to block click events for the dropdowns creating a custom `<div>` layer over the dropdown to intercept user's clicks. This workaround is applied as soon as the web page fires the `DOMContentLoaded` JavaScript event. The default value is `false`.
 
 ##### `InAppWebView` iOS-specific options
 

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

@@ -180,6 +180,9 @@ public class InAppWebViewClient extends WebViewClient {
     if (webView.options.useOnLoadResource) {
       js += InAppWebView.resourceObserverJS.replaceAll("[\r\n]+", "");
     }
+    if (webView.options.dropDownWorkaroundEnabled && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+      js += InAppWebView.dropDownWorkaroundJS.replaceAll("[\r\n]+", "");
+    }
     js += InAppWebView.printJS.replaceAll("[\r\n]+", "");
 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
@@ -226,10 +229,6 @@ public class InAppWebViewClient extends WebViewClient {
 
     String js = InAppWebView.platformReadyJS.replaceAll("[\r\n]+", "");
 
-    if (webView.options.dropDownWorkaroundEnabled) {
-      js += InAppWebView.dropDownWorkaroundJS.replaceAll("[\r\n]+", "");
-    }
-
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
       webView.evaluateJavascript(js, (ValueCallback<String>) null);
     } else {

lib/src/webview_options.dart

@@ -410,6 +410,7 @@ class AndroidInAppWebViewOptions
 
   ///Enable a temporary workaround for html dropdowns (`<select>` tags). It requires **JavaScript enabled**.
   ///It attempts to block click events for the dropdowns creating a custom `<div>` layer over the dropdown to intercept user's clicks.
+  ///This workaround is applied as soon as the web page fires the `DOMContentLoaded` JavaScript event.
   ///The default value is `false`.
   ///
   ///**NOTE**: available on Android 19+.