See [this stackoverflow](https://stackoverflow.com/questions/14267781/sorting-html-table-with-javascript)

If the table doesn't have a `tbody`:
```js
const getCellValue = (tr, idx) => tr.children[idx].innerText || tr.children[idx].textContent;

const comparer = (idx, asc) => (a, b) => ((v1, v2) => 
    v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2) ? v1 - v2 : v1.toString().localeCompare(v2)
    )(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));

// do the work...
document.querySelectorAll('th').forEach(th => th.addEventListener('click', (() => {
    const table = th.closest('table');
    Array.from(table.querySelectorAll('tr:nth-child(n+2)'))
        .sort(comparer(Array.from(th.parentNode.children).indexOf(th), this.asc = !this.asc))
        .forEach(tr => table.appendChild(tr) );
})));
```


If the table has a `tbody`:
```js
const getCellValue = (tr, idx) => tr.children[idx].innerText || tr.children[idx].textContent;

const comparer = (idx, asc) => (a, b) => ((v1, v2) => 
    v1 !== '' && v2 !== '' && !isNaN(v1) && !isNaN(v2) ? v1 - v2 : v1.toString().localeCompare(v2)
    )(getCellValue(asc ? a : b, idx), getCellValue(asc ? b : a, idx));

document.querySelectorAll('th').forEach(th => th.addEventListener('click', (() => {
  const table = th.closest('table');
  const tbody = table.querySelector('tbody');
  Array.from(tbody.querySelectorAll('tr'))
    .sort(comparer(Array.from(th.parentNode.children).indexOf(th), this.asc = !this.asc))
    .forEach(tr => tbody.appendChild(tr) );
})))
```