Calling GWT Function from JS in GWT Application

Calling GWT Function from JS in GWT Application

In our *.html file add this line of code

<script type="text/javascript" language="javascript">

 function localJavaScript() {

  var msg = window.gwtJSCall("SiddharthaDhumale");

  alert(msg);

 }

</script>

       <h1>Calling GWT Function from JS in GWT Application</h1>

       <table align="center">

              <tr>

                    

              </tr>

              <tr>

                     <button onclick="localJavaScript();">Button to execute Java function.</button>

              </tr>

              <tr>

                     <td colspan="2" style="color: red;" id="errorLabelContainer"></td>

              </tr>

       </table>

</body>

</html>

In our client side use this code

       public class TestExternalJS implements EntryPoint {

      

        public static String GWTClassFunction(String name) {

                return "HellGWTClassFunction called  " + name + "!";

               }

               public static native void exportMethod() /*-{

                $wnd.gwtJSCall = function(name) {

                 return @com.test.client.TestExternalJS::GWTClassFunction(Ljava/lang/String;)(name);

                };

               }-*/;

      

       /**

        * This is the entry point method.

        */

       public void onModuleLoad() {

              exportMethod();

             

             

       }

}