Epsilon notes markdown extra attributes fixed

const regExtra = /<(\w+)\s*(.*)>([^{>]*)\{([^}]+)\}(.*)/g,
    regAttr = /([^= ]+)=['"]?([^"']+)['"]?/g;
let body = document.body,
    html = body.innerHTML;
body.innerHTML = html.replace(regExtra, (s, tag, eAttr, bCont, attr, aCont) => {
  if(['script','style'].indexOf(tag) !== -1) return s;
  let attrMap = {}, newAttr;
  eAttr.replace(regAttr, (a, aKey, aValue) => {
    attrMap[aKey] = aValue;
  });
  normalizeAttributes = (a, aKey, aValue) => {
    const existingValue = attrMap[aKey];
    if(existingValue !== undefined && aKey === 'class') {
      aValue = `${existingValue} ${aValue}`;
    }
    return `${aKey}="${aValue}"`;
  };
  newAttr = attr.split(" ").map(part => {
    return part
      .replace(/^\./, "class=")
      .replace(/^#/, "id=")
      .replace(regAttr, normalizeAttributes);
  });
  return `<${tag} ${newAttr.join(' ')}>${bCont} ${aCont}`;
});