JSFiddle - React, Tailwind, and code Playground

HTML

<div id="full-width-slider" class="royalSlider heroSlider rsMinW rsDefault">
    <div class="rsContent">
        <img class="rsImg" src="https://www.w3schools.com/w3images/fjords.jpg" alt="">
        <div class="infoBlock infoBlockLeftBlack rsABlock" data-fade-effect="" data-move-offset="100" data-move-effect="top" data-speed="200">
            <a href="#" class="infox">X</a>
            <div class="minus7">
                <h4>Nice picture</h4>
                <p>This is the info about it. It´s nice, short and easy to read.</p>
            </div>
        </div>
    </div>

CSS

html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden
}

.royalSlider {
    width: 100%;
    height: auto;
    position: relative;
    direction: ltr;
}

.royalSlider > * {
    float: left;
}

.rsContent {
    width: 100%;
    height: 100%;
    position: relative;
}

.rsABlock {
    left: 0;
    /*top: 0;*/
    position: absolute;
    z-index: 15;
}

img.rsImg {
    max-width: none;
}

#full-width-slider {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    /* height of thumbs (if not required set to 0) */
    height: auto !important;
    /* optionally add !important for WP version */
    width: auto;
}

.infoBlock {
    position: absolute;
    /*top: 30px;*/
    bottom: 0px;
    right: 30px;
    left: auto;
    max-width: 25%;
    padding-bottom: 0;
    background: #FFF;
    background: rgba(255, 255, 255, 0.8);
    overflow: hidden;
    padding: 20px;
    width: 220px;
}

.infoBlockLeftBlack {
    color: #FFF;
    background: #000;
    background: rgba(0, 0, 0, 0.75);
    left: 75px;
    right: auto;
}

.infoBlock h4 {
    font-size: 20px;
    line-height: 1.2;
    margin: 0;
    padding-bottom: 3px;
}

.infoBlock p {
    font-size: 14px;
    /*margin: 4px 0 0;*/
    margin-top: 1em;
}

.infoBlock a {
    color: #FFF;
    text-decoration: underline;
}

.minus7 {
    -ms-transform: rotate(-10deg);
    /* IE 9 */
    -webkit-transform: rotate(-10deg);
    /* Chrome, Safari, Opera */
    transform: rotate(-10deg) !important;
    margin-left: 0.5em;
    margin-top: 50px;
    margin-bottom: 100px;
}

.infoBlock {
    bottom: -20px;
    -ms-transform: rotate(10deg);
    /* IE 9 */
    -webkit-transform: rotate(10deg);
    /* Chrome, Safari, Opera */
    transform: rotate(10deg) !important;
}

.infox {
    position: absolute;
    bottom: -40px;
    width: 50px;
    height: 90px;
    background-color: grey;
    left: 0px;
    z-index: 50;
}

JavaScript

$(document).on("click", ".infox", function() {
    $(".minus7").slideToggle();
});