JSFiddle - React, Tailwind, and code Playground
HTML
<script>
window.addEventListener('load', function() {
document.getElementByClassName('li').addEventListener('click', function(e) {
var style = document.getElementsByTagName('ol')[0].style;
style.display = (style.display == 'none') ? 'block' : 'none';
}, true);
}, true);
</script>
<input type="button" id="btn" value="expand" />
<ol>
<li class='li'>Value 1</li>
<li class='li'>Value 1</li>
<li class='li'>Value 1</li>
</ol>