phpjs/experimental/xmlwriter/xmlwriter_write_comment.js

php.js offers community built php functions in javascript

function xmlwriter_write_comment(xmlwriter, content) {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: var xmlwriter = xmlwriter_open_memory();
  // *     example 1: xmlwriter_write_comment(xmlwriter, "Here's a comment...");
  // *     returns 1: true

  return xmlwriter.writeComment(content);
}