How htmlunit supports ES6 ? #767

23:12:33.326 [main] DEBUG com.gargoylesoftware.htmlunit.util.EncodingSniffer - Encoding found in meta tag: 'UTF-8'.
23:12:33.328 [main] DEBUG com.gargoylesoftware.htmlunit.html.HtmlLink - Link node added: <link rel="icon" href="/favicon.ico"/>

23:12:33.328 [main] DEBUG com.gargoylesoftware.htmlunit.html.HtmlLink - Link type 'icon' not supported (<link rel="icon" href="/favicon.ico"/>).
23:12:33.332 [main] DEBUG com.gargoylesoftware.htmlunit.html.ScriptElementSupport - Script node added: <script type="module" lang="javascript" crossorigin="" src="/assets/index-DszroY3Z.js">
</script>

23:12:33.333 [main] DEBUG com.gargoylesoftware.htmlunit.html.ScriptElementSupport - Script is not JavaScript (type: 'module', language: ''). Skipping execution.
23:12:33.333 [main] DEBUG com.gargoylesoftware.htmlunit.html.HtmlLink - Link node added: <link rel="stylesheet" crossorigin="" href="/assets/index-C91cWaEe.css"/>

23:12:33.335 [main] DEBUG com.gargoylesoftware.htmlunit.WebClient - Load response for GET http://127.0.0.1:4173/assets/index-C91cWaEe.css