JSFiddle - React, Tailwind, and code Playground

by Aakash Chakravarthy

HTML

<select multiple>
    <optgroup label="Category 1">
        <option value="dasd">Option 1...</option>
        <option>Option 2...</option>
        <option>Option 3...</option>
    </optgroup>
    <optgroup label="Category 2">
        <option>Option 1...</option>
        <option>Option 2...</option>
        <option>Option 3...</option>
    </optgroup>
    <optgroup label="Category 3">
        <option>Option 1...</option>
        <option>Option 2...</option>
        <option>Option 3...</option>
    </optgroup>
</select>
<input type="text"/>

JavaScript

$('select').click(function(){
    $('input').val($(this).val());
});