JSFiddle - React, Tailwind, and code Playground

by Alexander Wigmore

HTML

<select id="category" name="category" style="width: 212px;" onclick='choose()'>
<option value="elec">Electronics</option>
<option value="bed">Bedding</option>
 </select>

<select id="items" name="items" style="display: none">
    <option value="1">mp3</option>
    <option value="2">dvd</option>
    <option value="3">tv</option>
</select>

JavaScript

function choose() {
    if (document.getElementById('category').value == 'elec') {
        document.getElementById('items').style.display = 'block';
    } else {
        document.getElementById('items').style.display = 'none';
    }
}