JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="toggle"/>Toggle Select
<select name="targets" id="targets">
    <option value="0">-----Select an option ----</option>
    <option value="1">option 1</option>
    <option value="2">option 2</option>
    <option value="3">option 3</option>
 </select>

JavaScript

$(document).ready(function() {
    $("#toggle").on('click', function() {
        if ($(this).is(':checked') == true){ 
            $("#targets").prop('multiple', true).attr("data-native-menu","false");
        } else {
            $("#targets").prop('multiple', false);
        }
    });
});