JSFiddle - React, Tailwind, and code Playground

HTML

<select multiple="" name="selectinputmultiple" id="">
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
</select>

JavaScript

$('select[name=selectinputmultiple]').on('change', function() {
    $('select[name=selectinputmultiple]').each(function() {
       console.log($(this).val());
     });  
});