MinimalExample.java

import lombok.extern.slf4j.Slf4j;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

@Slf4j
public class MinimalExample {

	public static void main(String[] args) {
		System.setProperty("webdriver.chrome.driver", "/path/to/chromedriver");

		WebDriver driver = new ChromeDriver();
		driver.get("http://stackoverflow.com/questions/11430773/how-to-use-javascript-with-selenium-webdriver-using-java");
		try {
			Thread.sleep(5000);  // Let the user actually see something!
		}
		catch (InterruptedException e) {
			e.printStackTrace();
		}
		JavascriptExecutor jsExecutor = (JavascriptExecutor) driver;
		jsExecutor.executeAsyncScript("return getEventListeners(document.getElementById('wmd-input'));");
		try {
			Thread.sleep(5000);  // Let the user actually see something!
		}
		catch (InterruptedException e) {
			e.printStackTrace();
		}
		driver.quit();
	}

}

z.log

[0.338][INFO]: COMMAND InitSession {
   "desiredCapabilities": {
      "browserName": "chrome",
      "chromeOptions": {
         "args": [  ],
         "extensions": [  ]
      },
      "platform": "ANY",
      "version": ""
   }
}
[0.343][INFO]: Populating Preferences file: {
   "alternate_error_pages": {
      "enabled": false
   },
   "autofill": {
      "enabled": false
   },
   "browser": {
      "check_default_browser": false
   },
   "distribution": {
      "import_bookmarks": false,
      "import_history": false,
      "import_search_engine": false,
      "make_chrome_default_for_user": false,
      "show_welcome_page": false,
      "skip_first_run_ui": true
   },
   "dns_prefetching": {
      "enabled": false
   },
   "profile": {
      "content_settings": {
         "pattern_pairs": {
            "https://*,*": {
               "media-stream": {
                  "audio": "Default",
                  "video": "Default"
               }
            }
         }
      },
      "default_content_setting_values": {
         "geolocation": 1
      },
      "default_content_settings": {
         "geolocation": 1,
         "mouselock": 1,
         "notifications": 1,
         "popups": 1,
         "ppapi-broker": 1
      },
      "password_manager_enabled": false
   },
   "safebrowsing": {
      "enabled": false
   },
   "search": {
      "suggest_enabled": false
   },
   "translate": {
      "enabled": false
   }
}
[0.343][INFO]: Populating Local State file: {
   "background_mode": {
      "enabled": false
   },
   "ssl": {
      "rev_checking": {
         "enabled": false
      }
   }
}
[0.345][INFO]: Launching chrome: /Applications/Google Chrome.app/Contents/MacOS/Google Chrome --disable-background-networking --disable-client-side-phishing-detection --disable-component-update --disable-default-apps --disable-hang-monitor --disable-popup-blocking --disable-prompt-on-repost --disable-sync --disable-web-resources --enable-logging --ignore-certificate-errors --load-extension=/var/folders/zs/5skcq3ps3dl31s81632fkx800000gn/T/.org.chromium.Chromium.gDb0sZ/internal --log-level=0 --metrics-recording-only --no-first-run --password-store=basic --remote-debugging-port=12252 --safebrowsing-disable-auto-update --safebrowsing-disable-download-protection --test-type=webdriver --use-mock-keychain --user-data-dir=/var/folders/zs/5skcq3ps3dl31s81632fkx800000gn/T/.org.chromium.Chromium.yE4T7e data:,
[1.283][INFO]: RESPONSE InitSession {
   "acceptSslCerts": true,
   "applicationCacheEnabled": false,
   "browserConnectionEnabled": false,
   "browserName": "chrome",
   "chrome": {
      "chromedriverVersion": "2.21.371459 (36d3d07f660ff2bc1bf28a75d1cdabed0983e7c4)",
      "userDataDir": "/var/folders/zs/5skcq3ps3dl31s81632fkx800000gn/T/.org.chromium.Chromium.yE4T7e"
   },
   "cssSelectorsEnabled": true,
   "databaseEnabled": false,
   "handlesAlerts": true,
   "hasTouchScreen": false,
   "javascriptEnabled": true,
   "locationContextEnabled": true,
   "mobileEmulationEnabled": false,
   "nativeEvents": true,
   "platform": "Mac OS X",
   "rotatable": false,
   "takesHeapSnapshot": true,
   "takesScreenshot": true,
   "version": "49.0.2623.39",
   "webStorageEnabled": true
}
[1.320][INFO]: COMMAND Navigate {
   "url": "http://stackoverflow.com/questions/11430773/how-to-use-javascript-with-selenium-webdriver-using-java"
}
[1.320][INFO]: Waiting for pending navigations...
[1.322][INFO]: Done waiting for pending navigations
[1.839][INFO]: Waiting for pending navigations...
[2.654][INFO]: Done waiting for pending navigations
[2.654][INFO]: RESPONSE Navigate
[7.660][INFO]: COMMAND ExecuteAsyncScript {
   "args": [  ],
   "script": "return getEventListeners(document.getElementById('wmd-input'));"
}
[7.660][INFO]: Waiting for pending navigations...
[7.661][INFO]: Done waiting for pending navigations
[7.669][INFO]: Waiting for pending navigations...
[7.670][INFO]: Done waiting for pending navigations
[7.670][INFO]: RESPONSE ExecuteAsyncScript javascript error: getEventListeners is not defined
JavaScript stack:
ReferenceError: getEventListeners is not defined
    at eval (eval at executeAsyncScript (unknown source), <anonymous>:2:27)
    at eval (eval at executeAsyncScript (unknown source), <anonymous>:2:86)
    at executeAsyncScript (<anonymous>:329:26)
    at <anonymous>:345:29
    at callFunction (<anonymous>:237:33)
    at <anonymous>:247:23
    at <anonymous>:248:3
    at Object.InjectedScript._evaluateOn (<anonymous>:878:140)
    at Object.InjectedScript._evaluateAndWrap (<anonymous>:811:34)
    at Object.InjectedScript.evaluate (<anonymous>:667:21)
  (Session info: chrome=49.0.2623.39)