JSFiddle - React, Tailwind, and code Playground
by Jim_Toth
HTML
<form method="post">
<select multiple id="select">
<option value="volvo" selected>Volvo</option>
<option value="saab" selected>Saab</option>
<option value="opel" selected>Opel</option>
<option value="audi" selected>Audi</option>
</select>
<input id="sub" type="submit" value="Submit">
<input id="res" type="reset" value="reset">
<form>
JavaScript
$("#select option").removeAttr("selected");
$('#select option[value="volvo"]').prop('selected', true);
$('#select option[value="audi"]').prop('selected', true);
//$('#sub').click();