Click javascript events not firing? dispatchEvent seems to not work

The javascript executor does not seem to launch the click event. But when I run the same javascript directly via dev tools it opens the new page correctly.

I would expect the “test” search results to show, but they do not.

I tried several approaches without success and started to wonder if its a bug or a limitation with HtmlUnit or the driver not correctly processing the javascript.

Not sure if I should open the issue in or in the webdriver repo, can re-open if it is not in the correct location.

package seleniumHtmlunit;

import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;

import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.javascript.SilentJavaScriptErrorListener;

public class Test {

	public static void main(String[] args) {

		WebDriver webDriver = new HtmlUnitDriver(BrowserVersion.FIREFOX, true) {
		    @Override
		    protected WebClient modifyWebClient(WebClient client) {
		        final WebClient webClient = super.modifyWebClient(client);
		        webClient.getOptions().setCssEnabled(false);
		        webClient.getOptions().setJavaScriptEnabled(true);
		        webClient.getOptions().setDownloadImages(false);
		        webClient.getOptions().setThrowExceptionOnScriptError(false);
		        webClient.setJavaScriptErrorListener(new SilentJavaScriptErrorListener());

		       return webClient;
		    }
		};

		duckDuckTest(webDriver);
		webDriver.close();
		
	}

	private static void duckDuckTest(WebDriver webDriver) {
		webDriver.get("https://duckduckgo.com/");
		JavascriptExecutor js = (JavascriptExecutor) webDriver;
		String script = "var search = document.evaluate(\"//input[@id='search_form_input_homepage']\", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;\r\n"
				+ "search.value=\"test\";\r\n"
				+ "\r\n"
				+ "const event = new MouseEvent('click', {\r\n"
				+ "    view: window,\r\n"
				+ "    bubbles: true,\r\n"
				+ "    cancelable: true\r\n"
				+ "  });\r\n"
				+ "var cb = document.evaluate(\"//input[@id='search_button_homepage']\", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;\r\n"
				+ "\r\n"
				+ "cb.dispatchEvent(event)";
		js.executeScript(script);

		
	}

}

This is the javascript:

var search = document.evaluate("//input[@id='search_form_input_homepage']", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
search.value="test";

const event = new MouseEvent('click', {
    view: window,
    bubbles: true,
    cancelable: true
  });
var cb = document.evaluate("//input[@id='search_button_homepage']", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;

cb.dispatchEvent(event)

You can wait for a condition such as

(new WebDriverWait(webDriver,30)).until(ExpectedConditions.presenceOfElementLocated(By.xpath("//span[normalize-space()='The name test is reserved by the Internet Engineering Task Force in RFC 2606 as a domain name that is not intended to be installed as a top-level domain in the global Domain Name System of the Internet for production use.']")));

and it fails. It never reaches the next page, clicking the search button by firing off the click event.

[rbri]

Hi @skyhirider, made the first commits for this problem. If the build is green, i will build a new snapshot. Please check at twitter.

Some background: The problem here is the line

event = new MouseEvent('click', 

The first parameter was ignored and as a result the event dispatcher has not forced the click handling. So far i have done a bunch of fixes for the MouseEvent impl but i have to fix all the other event classes also.

Will be great if you can test the new snapshot (as soon as it is available 😃 and please provide feedback.

[rbri]

Ok, think a found at least one reason for this - will require some days to fix because i fear i have to write a bunch of tests for all our event implementations.