JSFiddle - React, Tailwind, and code Playground

HTML

<select>
    <option>Foo</option>
    <option>Barrrr</option>
    <option>Baseball!!</option>
</select>
<input type="text"/>

CSS

.fix {
    position: fixed;
}

.normal {
    position: absolute;
}

.box{
    width: 100px;
    height: 100px;
    background-color: red;
}

#content {
    background-color: blue;
    width: 400px;
    height: 2400px;
}

JavaScript

$(function(){
    $('select').bind('change', function(){
        $('input').val($(this).val());
    });
});