Examples of com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute()

com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute()
Executes the specified JavaScript code in the context of a given HTML page. @param htmlPage the page that the code will execute within @param sourceCode the JavaScript code to execute @param sourceName the name that will be displayed on error conditions @param startLine the line at which the script source starts @return the result of executing the specified code

   {
      JavaScriptEngine jse = client.getContentPage().getEnclosingWindow().getWebClient().getJavaScriptEngine();


      log.info( "Script is "+ (jse.isScriptRunning()?"":"not") +" running." );


      Object jsTreeItem = jse.execute((HtmlPage) client.getContentPage(), "Tree.Item", "testTreeItemLoaded", 0);
      log.info( jsTreeItem.getClass().getName() );
      log.info( ObjectUtils.toString(jsTreeItem) );


      //org.mozilla.javascript.InterpretedFunction
      // extends NativeFunction implements Script

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      log.info( "Source: " + func.getEncodedSource() );






      // JS null object?
      jsTreeItem = jse.execute((HtmlPage) client.getContentPage(), "null", "testTreeItemLoaded", 0);
      if( null == jsTreeItem ){
        // True.
      }
      else {
        log.info( jsTreeItem.getClass().getName() );

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