JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.jsdelivr.net/npm/@simonwep/presentr/dist/presentr.min.js"></script>
<div class="presentr">
    <div class="progress"></div>

    <div class="slides">

        <!-- Slide 1 -->
        <section class="welcome">
            <h1>キーボードの矢印キーで進めます</h1>

    
        </section>

        <!-- Slide 2 -->
        <section class="features">
            <h2>どんどん→キーで進めます</h2>

            <div class="list">
                <p class="frag">シンプルで</p>
                <p class="frag">jQueryなんかも不要</p>
                <p class="frag">一切の依存もなく</p>
                <p class="frag">扱いも簡単</p>
                <p class="frag">とっても軽量です</p>
            </div>
        </section>

        <!-- Slide 3 -->
        <section class="setup">
            <h2>hogehoge</h2>

            <div class="methods">
                <div class="frag method">
                    <h3>huga</h3>
                    <code>hugahuga</code>
                </div>

                <div class="frag method">
                    <h3>piyo</h3>
                    <code>piyopiyo</code>
                </div>

                <div class="frag method">
                    <h3>foo</h3>
                    <code>fooooooooooooooooo!</code>
                </div>

                <div class="frag method">
                    <h3>bar</h3>
                    <code>baaaaaaaaaaaaaaar!</code>
                </div>
            </div>
        </section>

        <!-- Slide 4 -->
        <section class="gh">
            <h2>詳細は以下</h2>
            <a href="https://github.com/Simonwep/presentr">GitHub</a>
        </section>
    </div>

</div>

CSS

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
}

.presentr {
    font-size: 1vw;
}

.presentr .progress {
    position: fixed;
    background: #ff4446;
    top: 0;
    left: 0;
    width: 0;
    height: 0.2vh;
    z-index: 1;
    transition: all 1s;
}

.presentr .slides {
    transition: all 0.6s;
}

.presentr .slides section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    filter: grayscale(100%);
}

.presentr .slides section h2 {
    font-family: 'Satisfy';
    font-size: 8em;
    color: #ff4446;
    margin-bottom: 5vh;
}

.presentr .slides section h2,
.presentr .slides section.welcome h1 {
    text-shadow: 2px 2px 0 #862224;
}

.presentr .slides section.welcome .keyboard-shortcuts {
    text-align: center;
    color: rgba(0, 0, 0, 0.75);
    font-size: 1.3em;
}

.presentr .slides section.welcome .keyboard-shortcuts p {
    transform: translateY(-0.5vh);
    opacity: 0;
    margin: 0.3em 0;
    animation: normalize 0.7s ease forwards;
}

.presentr .slides section.welcome .keyboard-shortcuts p:nth-child(2) {
    animation-delay: 0.5s;
}

.presentr .slides section.welcome .keyboard-shortcuts b {
    font-weight: 600;
}

.presentr .slides section.welcome h1 {
    font-family: 'Satisfy';
    font-size: 10em;
    color: #ff4446;
}

.presentr .slides section.features .list {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.presentr .slides section.features .list p {
    color: rgba(0, 0, 0, 0.85);
    display: inline-block;
    position: relative;
    margin: 0.5em 0;
    padding: 0.3em 0.4em 0 0.4em;
    font-size: 2em;
    text-align: center;
}

.presentr .slides section.features .list p::before {
    position: absolute;
    content: '';
    bottom: -0.2em;
    left: 0;
    right: 0;
    margin: auto;
    width: 0;
    height: 100%;
    background: #ff4446;
    transition: all 0.5s;
    z-index: -1;
}

.presentr .slides...

JavaScript

// Simple example, see optional options for more configuration.
const presentr = new Presentr({

    // Selector for each slide
    slides: '.presentr .slides > section'
});