JS Convert UL (unordered HTML lists) to table (CSV)

let table = "<table><tbody>";

for (let li of document.querySelectorAll("li")) {
  table += "<tr>";

  table += getRowString(li, "");

  table += "</tr>";
}

function getRowString(li, rowString) {
  if (li.nodeName !== "LI") {
    // Finish and return row if there is no more li's to parse
    return rowString;
  }

  // Add current li's text as td before it's children text
  rowString = `${getTdFromLi(li)}${rowString}`;

  // Go up one element and repeat process using li's parent element
  return getRowString(li.parentNode.parentNode, rowString);
}

function getTdFromLi(li) {
  return `<td>${li.childNodes[0].nodeValue.trim()}</td>`;
}

table += "</tbody></table>";

/*
 To print resulting table directly on page, use:
    document.write(table);
    
 To dump resulting table's code inside console, use:
    console.log(table); 
 */