Interactive test is broken

[roesslerj]

When opening the usage example and executing the transformation in the browser (Chrome), no result is shown and instead the following error message appears in the console:

Uncaught SyntaxError: await is only valid in async functions and the top level bodies of modules
    at xslt.html:18
Uncaught ReferenceError: cleanxml is not defined
    at onload (xslt.html:34:29)

Even when fixing all obvious errors in the code, like so:

      function el(id) {
        return document.getElementById(id);
      }

      function test_xslt() {
          const xmlParser = new globalThis.XsltProcessor.XmlParser();
          const xml = xmlParser.xmlParse(el('xml').value);
          const xslt = xmlParser.xmlParse(el('xslt').value);
          const xsltProcessor = new globalThis.XsltProcessor.Xslt();
          xsltProcessor.xsltProcess(xml, xslt).then(output => {
            console.log(output);
            el('html').value = output;
            el('htmldisplay').innerHTML = output;
          });
      }

      function cleanxml() {
          cleanvalue('xml');
          cleanvalue('xslt');
      }

      function cleanvalue(id) {
          const x = el(id);
          x.value = x.value.replace(/^\s*/, '').replace(/\n\s*/g, '\n');
      }

output with the given XML and XSLT is '', which is wrong.