JSFiddle - React, Tailwind, and code Playground
by alexbfree
HTML
<select name="multipleoption2" multiple>
<option value="1"/><label for="1">April</label>
<option value="x1"/><label for="x1">Archer</label>
<option value="4"/><label for="4">Decker</label>
<option value="c"/><label for="c">Garrett</label>
<option value="b"/><label for="b">Harriman</label>
<option value="3"/><label for="3">Kirk</label>
<option value="d"/><label for="de">Picard</label>
<option value="2"/><label for="2">Pike</label>
<option value="5"/><label for="5">Spock</label>
</select>
JavaScript
$('select[name=multipleoption2]').val('x1').trigger('change');
$('select[name=multipleoption2]').val('de').trigger('change');