html select onchange get value code example

Example 1: .on change get value

$('select').on('change', function() {
  alert( this.value );
});

Example 2: onchange on select tag

<select id="comboA" onchange="getComboA(this)">
  <option value="">Select combo</option>
  <option value="Value1">Text1</option>
  <option value="Value2">Text2</option>
  <option value="Value3">Text3</option>
</select>