# How implement event listener? **URL:** \ **Category:** Web Testing\ **Tags:** katalon-studio\ **Created:** [January 24, 2018, 2:05pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030 "2018-01-24T14:05:36Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Edita\_Markauskaite](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/edita_markauskaite/32/2770_2.png) [@Edita\_Markauskaite](https://forum.katalon.com/u/Edita_Markauskaite)\ **Post date:** [January 24, 2018, 2:05pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/1 "2018-01-24T14:05:36Z")
Hi, Does anyone knows how to use and implement AbstractWebDriverEventListener or smth like this? I want to make that after every click will check if there is no errors in console. So the best way I can find out is event listener. But I do not find how to use it. I even can`t create class only keyword. PLEASE, HELP ---
**Author:** ![B\_L](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/b_l/32/976_2.png) [@B\_L](https://forum.katalon.com/u/B_L)\ **Post date:** [January 24, 2018, 7:35pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/2 "2018-01-24T19:35:47Z")
May I ask what is your end goal? What sort of errors are you checking for and if they occur what are you wanting to happen? ---
**Author:** ![B\_L](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/b_l/32/976_2.png) [@B\_L](https://forum.katalon.com/u/B_L)\ **Post date:** [January 25, 2018, 1:11pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/3 "2018-01-25T13:11:08Z")
. ---
**Author:** ![Zarashima](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/zarashima/32/928_2.png) [@Zarashima](https://forum.katalon.com/u/Zarashima)\ **Post date:** [January 25, 2018, 4:06pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/4 "2018-01-25T16:06:07Z")
> [Edita Markauskaitė](https://forum.katalon.com/profile/3217/Edita%20Markauskait%C4%97 "Link: /profile/3217/Edita%20Markauskait%C4%97") said: > > Hi, > Does anyone knows how to use and implement AbstractWebDriverEventListener or smth like this? I want to make that after every click will check if there is no errors in console. > So the best way I can find out is event listener. But I do not find how to use it. I even can`t create class only keyword. > PLEASE, HELP Can I ask where do you get this ‘AbstractWebDriverEventListener’? Currently this listener is not supported directly in Katalon Studio, so I can’t give solutions for this question 🙂 ---
**Author:** ![Edita\_Markauskaite](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/edita_markauskaite/32/2770_2.png) [@Edita\_Markauskaite](https://forum.katalon.com/u/Edita_Markauskaite)\ **Post date:** [January 29, 2018, 9:16am UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/5 "2018-01-29T09:16:04Z")
I found it on Selenium. My goal is to call my custom function after every click. ---
**Author:** ![Zarashima](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/zarashima/32/928_2.png) [@Zarashima](https://forum.katalon.com/u/Zarashima)\ **Post date:** [January 29, 2018, 11:20am UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/6 "2018-01-29T11:20:21Z")
> [Edita Markauskaitė](https://forum.katalon.com/profile/3217/Edita%20Markauskait%C4%97) said: > > I found it on Selenium. My goal is to call my custom function after every click. So it’s not applicable in Katalon Studio because Katalon Studio doesn’t support this Test Listener 🙂 ---
**Author:** ![Edita\_Markauskaite](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/edita_markauskaite/32/2770_2.png) [@Edita\_Markauskaite](https://forum.katalon.com/u/Edita_Markauskaite)\ **Post date:** [January 29, 2018, 1:05pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/7 "2018-01-29T13:05:23Z")
Maybe there is other listener which can help me? Or some other way? ---
**Author:** ![Edita\_Markauskaite](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/edita_markauskaite/32/2770_2.png) [@Edita\_Markauskaite](https://forum.katalon.com/u/Edita_Markauskaite)\ **Post date:** [January 31, 2018, 9:34am UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/8 "2018-01-31T09:34:28Z")
Anyone can help me? ---
**Author:** ![Ste\_Duong](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@Ste\_Duong](https://forum.katalon.com/u/Ste_Duong)\ **Post date:** [November 22, 2018, 7:57am UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/9 "2018-11-22T07:57:46Z")
I have the same interests with Edita Markauskaitė. Is there any way to put more annotation in event listener? ---
**Author:** ![Drunda\_Nibel](https://avatars.discourse-cdn.com/v4/letter/d/bb73d2/32.png) [@Drunda\_Nibel](https://forum.katalon.com/u/Drunda_Nibel)\ **Post date:** [November 22, 2018, 9:29am UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/10 "2018-11-22T09:29:49Z")
I could imagine that it is possible to implement this Selenium method AbstractWebDriverEventListener with your own code by using your own WebDriver according to [this guide](https://docs.katalon.com/katalon-studio/tutorials/using_selenium_webdriver_katalon_studio.html). If you make any progress in this matter, I would be very interested in your approach. ---
**Author:** ![kazurayam](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/kazurayam/32/333_2.png) [@kazurayam](https://forum.katalon.com/u/kazurayam)\ **Post date:** [November 23, 2018, 7:07am UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/11 "2018-11-23T07:07:21Z")
I tried what Drunda mentioned but got no success. See my project on Github - [https://github.com/kazurayam/KatalonDiscussion4851](https://github.com/kazurayam/KatalonDiscussion4851) I made a test case: ```auto import static com.kms.katalon.core.testobject.ObjectRepository.findTestObject import org.openqa.selenium.WebDriverimport org.openqa.selenium.WebElementimport org.openqa.selenium.chrome.ChromeDriverimport org.openqa.selenium.firefox.FirefoxDriver import org.openqa.selenium.support.events.AbstractWebDriverEventListenerimport org.openqa.selenium.support.events.EventFiringWebDriver import com.kms.katalon.core.driver.DriverTypeimport com.kms.katalon.core.webui.driver.DriverFactory import com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords as WebUI /** * copied from https://www.seleniumeasy.com/selenium-tutorials/webdriver-event-listener-example */ class WebEventListener extends AbstractWebDriverEventListener { public void beforeClickOn(WebElement element, WebDriver driver) { System.out.println("Trying to click on: " + element.toString()); } public void afterClickOn(WebElement element, WebDriver driver) { System.out.println("Clicked on: " + element.toString()); } } WebDriver createWebDriver() { DriverType dt = DriverFactory.getExecutedBrowser() WebUI.comment("executed browser is ${dt.getName()}") WebDriver driver = null switch (dt.getName()) { case 'FIREFOX_DRIVER': System.setProperty('webdriver.gecko.driver', DriverFactory.getGeckoDriverPath()) driver = new FirefoxDriver() break; case 'CHROME_DRIVER': System.setProperty('webdriver.chrome.driver', DriverFactory.getChromeDriverPath()) driver = new ChromeDriver() break; } return driver } // create WebDriver which can fire events WebDriver driver = createWebDriver() EventFiringWebDriver e_driver = new EventFiringWebDriver(driver) e_driver.register(new WebEventListener()) // let Katalon to use the event-firing WebDriverDriverFactory.changeWebDriver(e_driver) WebUI.navigateToUrl('https://katalon-demo-cura.herokuapp.com/') WebUI.verifyElementPresent(findTestObject('Object Repository/Page_CURA Healthcare Service/a_Make Appointment'), 10) WebUI.click(findTestObject('Object Repository/Page_CURA Healthcare Service/a_Make Appointment')) WebUI.closeBrowser() ``` I got the flowing error: ```auto 11-23-2018 03:54:10 PM - [ERROR] - Test Cases/TC1 FAILED because (of) (Stack trace: java.lang.ClassCastException: org.openqa.selenium.support.events.EventFiringWebDriver cannot be cast to org.openqa.selenium.remote.RemoteWebDriver at com.kms.katalon.core.webui.driver.DriverFactory.logBrowserRunData(DriverFactory.java:477) at com.kms.katalon.core.webui.driver.DriverFactory.changeWebDriver(DriverFactory.java:192) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93) at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite$StaticMetaMethodSiteNoUnwrapNoCoerce.invoke(StaticMetaMethodSite.java:151) at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite.call(StaticMetaMethodSite.java:91) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125) at Script1542945386835.run(Script1542945386835.groovy:50) ...) ``` It is failing at ```auto DriverFactory.changeWebDriver(e_driver) ``` DriverFactory.changeWebDriver() method requires a RemoteWebDriver object as argument, but I passed an EventFiringWebDriver object; mismatching type. Therefore failed. If DriverFactory.changeWebDriver() method were designed to accept a org.openqa.selenium.WebDriver object, then it would have been fine. But it is not designed so. # Conclusion I think we can not use EventFiringWebDriver object in Katalon Studio. ---
**Author:** ![devalex88](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/devalex88/32/336_2.png) [@devalex88](https://forum.katalon.com/u/devalex88)\ **Post date:** [September 14, 2019, 2:36pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/12 "2019-09-14T14:36:10Z")
> **[WebDriver Event Listeners](https://docs.katalon.com/katalon-studio/docs/webdriver-event-listeners.html)** > > Starting in Katalon Studio version 7.0, the Katalon Studio's WebDriver extends the EventFiringWebDriver. You can use WebDriverEventListener to handle events triggered by the WebDriver, which happens before or after navigation;... Beta builds will be available next week. ---
**Author:** ![Russ\_Thomas](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/russ_thomas/32/11884_2.png) [@Russ\_Thomas](https://forum.katalon.com/u/Russ_Thomas)\ **Post date:** [September 14, 2019, 6:46pm UTC](https://forum.katalon.com/t/how-implement-event-listener/9030/13 "2019-09-14T18:46:11Z")
That’s gold for some people, Alex. Deserves its own Topic. > [@WebDriver Listeners and Hooks due in Katalon Studio 7](http://forum.katalon.com/t/webdriver-listeners-and-hooks-due-in-katalon-studio-7/33098): > > According to @devalex88, v7 beta releases will arrive next week (week beginning Sep 16/2019). [https://docs.katalon.com/katalon-studio/docs/webdriver-event-listeners.html](https://docs.katalon.com/katalon-studio/docs/webdriver-event-listeners.html)