JSFiddle - React, Tailwind, and code Playground

HTML

<div class="link" onclick="toggle('test')">Toggle</div>
<div id="test" style="display:none">Example text.</div>

CSS

.link {
    color: blue;
    text-decoration: underline;
    cursor: hand;
    cursor: pointer;
}
#test {
    background-color: gray;
    padding: 10px;
}

JavaScript

function toggle(objNameText) {
    var objText = document.getElementById(objNameText);
    if ( objText !== null ) {
        objText.style.display = (objText.style.display == '') ? 'none' : '';
    }
}