JSFiddle - React, Tailwind, and code Playground

HTML

<div>You can download the prodcut docuemnts below:</div>
<select id="selectMe">
    <option value="option0">Please select a module to download</option>
    <option value="option1">Module 1</option>
    <option value="option2">Module 2</option>
    <option value="option3">Module 3</option>
    <option value="option4">Module 4</option>
</select>
<div id="option1" class="group"><a href="#">Click here to download Module 1</a></div>
<div id="option2" class="group"><a href="#">Click here to download Module 2</a></div>
<div id="option3" class="group"><a href="#">Click here to download Module 3</a></div>
<div id="option4" class="group"><a href="#">Click here to download Module 4</a></div>

JavaScript

$(document).ready(function () {
    $('.group').hide();
    $('#selectMe').change(function () {
        $('.group').hide();
        $('#'+$(this).val()).show();
    })
});