JSFiddle - React, Tailwind, and code Playground

HTML

<div id="AccessLevel1" class="hide">
    Access Level 1 message.
</div>

<div id="AccessLevel0" class="hide">
    Access Level 0 message.
</div>

CSS

.hide {display: none; }
.show {display: block; }

JavaScript

var AccessLevel = 1;


if (AccessLevel === 1) {
    document.getElementById('AccessLevel1').setAttribute("class", "show");
} else if (AccessLevel === 0) {
    document.getElementById('AccessLevel0').setAttribute("class", "show");
} else {
    document.write("ERROR");
}