<script id=o_xml type="text/plain"><?xml version="1.0" encoding="UTF-8"?>
<xb></xb>
</script>
<script id=o_xslt type="text/plain"><?xml version="1.0" encoding="UTF-8"?>
<xsl:transform version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:template match="xb[$v1]"></xsl:template>
  <xsl:variable name="v1">
    <xsl:attribute name="a1" namespace="z">
      <xsl:variable name="v2" select="$v2"></xsl:variable>
    </xsl:attribute>
  </xsl:variable>
</xsl:transform>
</script>
<script>
addEventListener("DOMContentLoaded", function(){
  let doc = new DOMParser();
  let xsltPrs = new XSLTProcessor();
  xsltPrs.importStylesheet(doc.parseFromString(o_xslt.textContent, "text/xml"));
  xsltPrs.transformToDocument(doc.parseFromString(o_xml.textContent, "text/xml"));
});
</script>
