ScriptException when trying to execute a function

So as the title said, however in this case the script in the website cannot be modified (the script is in the error). When I try to execute login() from the click, it tells me a ScriptError exception (this is from the Selenium which uses HtmlUnitDriver): WebElement submit = driver.findElement(By.id("login")); submit.click();

Error: ======= EXCEPTION START ======== Exception class=[net.sourceforge.htmlunit.corejs.javascript.EvaluatorException] com.gargoylesoftware.htmlunit.ScriptException: missing ) after formal parameters: (https://aternos.org:443/panel/js/aternos.js?v=30042019#1) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:883) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:617) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:534) at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.callSecured(HtmlUnitContextFactory.java:336) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:714) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:680) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:103) at com.gargoylesoftware.htmlunit.html.HtmlPage.loadJavaScriptFromUrl(HtmlPage.java:1102) at com.gargoylesoftware.htmlunit.html.HtmlPage.loadExternalJavaScriptFile(HtmlPage.java:982) at com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:362) at com.gargoylesoftware.htmlunit.html.HtmlScript$2.execute(HtmlScript.java:236) at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:257) at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:792) at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source) at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:748) at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1175) at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1115) at net.sourceforge.htmlunit.cyberneko.filters.DefaultFilter.endElement(DefaultFilter.java:219) at net.sourceforge.htmlunit.cyberneko.filters.NamespaceBinder.endElement(NamespaceBinder.java:303) at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3146) at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2074) at net.sourceforge.htmlunit.cyberneko.HTMLScanner.scanDocument(HTMLScanner.java:922) at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:438) at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:389) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:991) at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:246) at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:190) at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:269) at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:160) at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:534) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:400) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:317) at org.openqa.selenium.htmlunit.HtmlUnitDriver.get(HtmlUnitDriver.java:715) at org.openqa.selenium.htmlunit.HtmlUnitDriver.lambda$get$8(HtmlUnitDriver.java:697) at org.openqa.selenium.htmlunit.HtmlUnitDriver.lambda$runAsync$0(HtmlUnitDriver.java:438) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

[rbri]

Thanks, was able to reproduce this.

The problem is (at least) this line in the js code

    $.prototype.fa = function(style = "fas", ...classes) {

At the moment Rhino (the base of the js implementation in HtmlUnit) does not support the spread operator (https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Operators/Spread_operator). And adding the support is not that simple.

[vmuthusamy]

@rbri @thienbao860 Any progress on this issue?

Curious to understand what would be the Level of effort on this undertaking.