Encontré este tutorial en w3schools: https://www.w3schools.com/howto/howto_js_sort_table.asp . Básicamente le muestra cómo ordenar una tabla haciendo clic en los encabezados.

Sin embargo, no tiene la característica que quiero, flechas direccionales en la columna que se está ordenando.

Tengo el CSS:

 .table-sortable th { cursor: pointer; } .table-sortable .th-sort-asc::after { content: "\25b4"; } .table-sortable .th-sort-desc::after { content: "\25be"; } .table-sortable .th-sort-asc::after, .table-sortable .th-sort-desc::after { margin-left: 5px; } .table-sortable .th-sort-asc, .table-sortable .th-sort-desc { background: rgba(0, 0, 0, 0.1); }

Mi problema es agregar las diferentes clases cuando se hace clic en el th , cambiarlas cuando se hace clic nuevamente y eliminarlas al hacer clic en una columna diferente.

JS de w3:

 function sortTable(n) { var table, rows, switching, i, x, y, shouldSwitch, dir, switchcount = 0; table = document.getElementById("myTable2"); switching = true; // Set the sorting direction to ascending: dir = "asc"; /* Make a loop that will continue until no switching has been done: */ while (switching) { // Start by saying: no switching is done: switching = false; rows = table.rows; /* Loop through all table rows (except the first, which contains table headers): */ for (i = 1; i < (rows.length - 1); i++) { // Start by saying there should be no switching: shouldSwitch = false; /* Get the two elements you want to compare, one from current row and one from the next: */ x = rows[i].getElementsByTagName("TD")[n]; y = rows[i + 1].getElementsByTagName("TD")[n]; /* Check if the two rows should switch place, based on the direction, asc or desc: */ if (dir == "asc") { if (x.innerHTML.toLowerCase() > y.innerHTML.toLowerCase()) { // If so, mark as a switch and break the loop: shouldSwitch = true; break; } } else if (dir == "desc") { if (x.innerHTML.toLowerCase() < y.innerHTML.toLowerCase()) { // If so, mark as a switch and break the loop: shouldSwitch = true; break; } } } if (shouldSwitch) { /* If a switch has been marked, make the switch and mark that a switch has been done: */ rows[i].parentNode.insertBefore(rows[i + 1], rows[i]); switching = true; // Each time a switch is done, increase this count by 1: switchcount ++; } else { /* If no switching has been done AND the direction is "asc", set the direction to "desc" and run the while loop again. */ if (switchcount == 0 && dir == "asc") { dir = "desc"; switching = true; } } } }

¡Cualquier ayuda es muy apreciada!