JSFiddle - React, Tailwind, and code Playground
HTML
<select multiple="multiple">
<option id="1">Opt</option>
<option id="2">Opt</option>
<option id="3">Opt</option>
<option id="4">Opt</option>
</select>
JavaScript
$('option').mousedown(function(e) {
e.preventDefault();
$(this).prop('selected', $(this).prop('selected') ? false : true);
return false;
});