get value of multiple select code example

Example 1: get value select 2

//get selected value
$('#mySelect2').find(':selected').val();

Example 2: how to get values from select multiple in js

document.getElementById('submit').onclick = function() {
  var selected = [];
  for (var option of document.getElementById('pets').options) {
    if (option.selected) {
      selected.push(option.value);
    }
  }
  alert(selected);
}