script.js

Shery.imageEffect("#back", {
    style: 5,
    config: {"a":{"value":2,"range":[0,30]},"b":{"value":-0.95,"range":[-1,1]},"zindex":{"value":-9996999,"range":[-9999999,9999999]},"aspect":{"value":1.931841335297676},"gooey":{"value":true},"infiniteGooey":{"value":true},"growSize":{"value":4,"range":[1,15]},"durationOut":{"value":1,"range":[0.1,5]},"durationIn":{"value":1,"range":[0.1,5]},"displaceAmount":{"value":0.5},"masker":{"value":true},"maskVal":{"value":1.15,"range":[1,5]},"scrollType":{"value":0},"geoVertex":{"range":[1,64],"value":1},"noEffectGooey":{"value":false},"onMouse":{"value":1},"noise_speed":{"value":0.2,"range":[0,10]},"metaball":{"value":0.15,"range":[0,2]},"discard_threshold":{"value":0.5,"range":[0,1]},"antialias_threshold":{"value":0,"range":[0,0.1]},"noise_height":{"value":0.5,"range":[0,2]},"noise_scale":{"value":10,"range":[0,100]}},
    gooey:true
})


var elems = document.querySelectorAll(".elem");

elems.forEach(function(elem){
    var h1s = elem.querySelectorAll("h1");
    var index = 0;
    var animating = false;

    document.querySelector("#main").addEventListener("click", function(){
        if(!animating){
            animating = true;
            gsap.to(h1s[index], {
                top: '-=100%',
                ease: Expo.easeInOut,
                duration: 1,
                onComplete: function () {
                    gsap.set(this._targets[0], {top: "100%"});
                    animating = false;
                },
            });
            index === h1s.length - 1 ? (index = 0) : index++;
            gsap.to(h1s[index], {
                top: '-=100%',
                ease: Expo.easeInOut,
                duration: 1
            })
        }
    })
})