RPeraltaJr
1/10/2020 - 7:30 PM

GSAP 3.0

Greensock 3 Documentation: https://greensock.com/3/
Notes: https://greensock.com/docs/v3/Plugins/CSSRulePlugin
Tutorial: https://www.youtube.com/watch?v=YqOhQWbouCE

index.html
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>GSAP 3.0</title>
    <link href="https://fonts.googleapis.com/css?family=Montserrat:400,500,600,700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="assets/css/main.css">
</head>
<body>
    <main>
        <div class="content">
            <h1 class="anim1"><span>Bridging the gap</span> <span>between dream</span> <span>and reality</span></h1>
            <p class="anim1">Lorem ipsum dolor sit, amet consectetur adipisicing elit. Odio at ipsa alias modi natus excepturi?</p>
            <a href="#" class="anim1" id="cta">Start Dreaming</a>
        </div>
    </main>
    <aside>
        <div class="wrapper">
            <img class="swirl" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/2621168/swirl.png" alt="Swirl Graphic">
        </div>
    </aside>

    <script src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/16327/gsap-latest-beta.min.js"></script>
    <script src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/16327/CSSRulePlugin3.min.js"></script>
    <script src="assets/js/main.js"></script>
</body>
</html>
main.css
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body {
    height: 100%;
    margin: 0;
    display: grid;
    grid-template-columns: auto 30%;
    font-family: 'Montserrat';
}
*, *:before, *:after {
    box-sizing: border-box;
}
.line {
    position: absolute;
}
main {
    margin-left: 20%;
    height: 100vh;
    display: grid;
    place-content: center;
}
main .content {
    width: 70%;
}
main .content h1 {
    font-size: 3em;
    position: relative;
}
main .content h1 span {
    display: block;
}
main .content p {
    font-size: 1.2em;
    width: 80%;
    line-height: 1.7em;
    margin-bottom: 2em;
}
aside {
    background: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/2621168/windows.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    height: 100vh;
}
img {
    width: 34%;
    position: absolute;
    right: 15%;
    top: 20%;
}
a {
    display: inline-block;
    background: #b100f2;
    color: white;
    font-weight: bold;
    text-transform: uppercase;
    text-decoration: none;
    padding: 1em;
}

/* For text reveal animation */
span:after {
    content: ' ';
    position: absolute;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    z-index: 1;
    transform-origin: 100% 0;
}
main.js
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// allows to change css class styles
let rule = CSSRulePlugin.getRule("span:after");

// set up a timeline
let timeline = gsap.timeline({ defaults: { duration: 1 } });

// begin timeline (animations will play in order listed unless an offset is specified)
timeline.from('.anim1', { opacity: 0, y: -50, stagger: 0.6 })
    .to(rule, { cssRule: {scaleY: 0 }}, '-=2.2')
    .from('aside', { opacity: 0, backgroundPosition: '200px 0px' }, '-=1.5')
    .from('img', { opacity: 0, y: 30 }, '-=0.5');

// reverse timeline on button click
let button = document.querySelector('#cta');
button.addEventListener('click', (e) => {
    e.preventDefault();
    timeline.reversed() ? timeline.play() : timeline.reverse();
});