JSFiddle - React, Tailwind, and code Playground

HTML

<div id=container>
    <h1>one</h1>
    <h1>two</h1>
    <h1 class="special">three</h1>
</div>

CSS

#container {
    margin-left: 100px;
}

.special:before {
    content: '[x]';
    position: relative;
    left: -30px;
}