jquery dropdwn seleccion index code example

Example 1: javascript for...of index

for (const [i, v] of ['a', 'b', 'c'].entries()) {
  console.log(i, v)
}

Example 2: column.footer jquery

var table = $('#example').DataTable();
var column = table.column(0);
$(column.footer()).html(
  column.data().reduce(function(a, b) {
    return a + b;
  })
);