JQuery - how to select dropdown item based on value
You should use
$('#dropdownid').val('selectedvalue');
Here's an example:
$('#dropdownid').val('selectedvalue');
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><select id='dropdownid'> <option value=''>- Please choose -</option> <option value='1'>1</option> <option value='2'>2</option> <option value='selectedvalue'>There we go!</option> <option value='3'>3</option> <option value='4'>4</option> <option value='5'>5</option></select>
$('#yourdropddownid').val('fg');
Optionally,
$('select>option:eq(3)').attr('selected', true);
where 3
is the index of the option you want.