(moved to a repo https://github.com/JonathanDn/mediumclap ) Medium Clap Reproduction - My take on it by looking, researching and trial & error. Demo available --> https://jsfiddle.net/urft14zr/425/

medium_clap.html

<div class="canvas">
    <div id="totalCounter" class="total-counter"></div>

    <div id="clap" class="clap-container">
        <i class="clap-icon fa fa-hand-paper-o"></i>
    </div>
    
    <div id="clicker" class="click-counter">
        <span class="counter"></span>
    </div>
    
    <div id="sonar-clap" class="clap-container-sonar"></div>
    
    <div id="particles" class="particles-container">
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
    </div>
    
    <div id="particles-2" class="particles-container">
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
    </div>
    
    <div id="particles-3" class="particles-container">
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
        <div class="triangle">
            <div class="square"></div>
        </div>
    </div>
    
</div>

medium_clap.js

let accCounter = 0;
let totalCount = 127;
const minDeg = 1;
const maxDeg = 72;
const particlesClasses = [
	{
    	class: "pop-top"
    },
    {
    	class: "pop-top-left"
    },
    {
    	class: "pop-top-right"
    },
    {
    	class: "pop-bottom-right"
    },
    {
    	class: "pop-bottom-left"
    },
];

document.getElementById('totalCounter').innerText = totalCount;

document.getElementById('clap').onmouseover = function() {
	let sonarClap = document.getElementById('sonar-clap');
    sonarClap.classList.add('hover-active');
    setTimeout(() => {
    	sonarClap.classList.remove('hover-active');
    }, 2000);
}

document.getElementById('clap').onclick = function() {
	const clap = document.getElementById('clap');
    const clickCounter = document.getElementById("clicker");
	const particles = document.getElementById('particles');
    const particles2 = document.getElementById('particles-2');
    const particles3 = document.getElementById('particles-3');
    clap.classList.add('clicked');
    upClickCounter();
    
    runAnimationCycle(clap, 'scale');
    
    if (!particles.classList.contains('animating')) {
    	animateParticles(particles, 700);
    } else if(!particles2.classList.contains('animating')){
    	animateParticles(particles2, 700);
    } else if(!particles3.classList.contains('animating')) {
    	animateParticles(particles3, 700);
    } 
}

function upClickCounter() {
    const clickCounter = document.getElementById("clicker");
    const totalClickCounter = document.getElementById('totalCounter');

	accCounter ++;
	clickCounter.children[0].innerText = '+' + accCounter;
    totalClickCounter.innerText = totalCount + accCounter;
    
    if (clickCounter.classList.contains('first-active')) {
		runAnimationCycle(clickCounter, 'active');
    } else {
    	runAnimationCycle(clickCounter, 'first-active');
    }
   	runAnimationCycle(totalClickCounter, 'fader');
}

function runAnimationCycle(el, className, duration) {
	if (el && !el.classList.contains(className)) {
    	el.classList.add(className);
    } else {
    	el.classList.remove(className);
        void el.offsetWidth; // Trigger a reflow in between removing and adding the class name
        el.classList.add(className);
    }
}

function runParticleAnimationCycle(el, className, duration) {
	if (el && !el.classList.contains(className)) {
    	el.classList.add(className);
        setTimeout(() => {
        	el.classList.remove(className);
        }, duration);
    } 
}

function animateParticles(particles, dur) {
	addRandomParticlesRotation(particles.id, minDeg, maxDeg);
    for(let i = 0; i < particlesClasses.length; i++) {
    	runParticleAnimationCycle(particles.children[i], particlesClasses[i].class, dur);
    }
    // Boolean functionality only to activate particles2, particles3 when needed
    particles.classList.add('animating');   
    setTimeout(() => {
    	particles.classList.remove('animating');
    }, dur);
}

function getRandomInt(min, max) {
	return Math.floor(Math.random() * (max - min  + 1)) + min;
}

function addRandomParticlesRotation(particlesName, minDeg, maxDeg) {
	const particles = document.getElementById(particlesName); 
    const randomRotationAngle = getRandomInt(minDeg, maxDeg) + 'deg';
	particles.style.transform = `rotate(${randomRotationAngle})`;
}

medium_clap.scss

$default-clap-color: #03a87c;
.canvas {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 300px;
    height: 300px;
    position: relative;
    .total-counter {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        position: absolute;
        margin-top: -45px;
        color: gray;
        font-family: sans-serif;
        font-size: 16px;
    }
    .total-counter.fader {
        animation: fade-in 1400ms forwards;
    }
    .clap-container {
        display: flex;
        justify-content: center;
        align-items: center;
        position: absolute;
        width: 60px;
        height: 60px;
        border: 1px solid rgba(0,0,0,.15);
        border-radius: 50%;
        z-index: 2;
        background: #fff;
        cursor: pointer;
        .clap-icon {
            font-size: 30px;
            color: $default-clap-color;
            width: 30px;
            height: 30px;
        }
    }
    .clap-container:hover {
        border: 1px solid $default-clap-color;
    }
    .clap-container.scale {
        animation: scaleAndBack 700ms forwards;
    }
    .click-counter {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 35px;
        height: 35px;
        position: absolute;
        top: 132px;
        background-color: $default-clap-color;
        border-radius: 50%;
        z-index: 1;
        .counter {
            font-family: sans-serif;
            font-size: 14px;
            color: #fff;
        }
    }
    .click-counter.first-active {
        animation: first-bump-in 1s forwards;
    }
    .click-counter.active {
        animation: bump-in 1s forwards;
    }
    .clap-container-sonar {
        width: 60px;
        height: 60px;
        background: $default-clap-color;
        border-radius: 50%;
        position: absolute;
        opacity: 0;
        z-index: 0;
    }
    .hover-active {
        animation: sonar-wave 2s forwards;
    }
    .particles-container {
       display: flex;
       justify-content: center;
       align-items: center;
       width: 60px;
       height: 60px;
       position: absolute;
       /* border: 1px solid gray; */
       /* z-index: 3; */
        .triangle {
            border-left: 4px solid transparent;
            border-right: 4px solid transparent;
            border-top: 10px solid red;
            border-bottom: 4px solid transparent;
            position: absolute;
            .square {
                width: 5px;
                height: 5px;
                background: $default-clap-color;
                position: absolute;
                left: -15px;
                top: 0;
            }
        }
        .pop-top {
            animation: pop-top 1s forwards;
        }
        .pop-top-left {
            animation: pop-top-left 1s forwards;
        }
        .pop-top-right {
            animation: pop-top-right 1s forwards;
        }
        .pop-bottom-right {
            animation: pop-bottom-right 1s forwards;
        }
        .pop-bottom-left {
            animation: pop-bottom-left 1s forwards;
        }
    }
}

// * * * Animations * * * //
@keyframes sonar-wave {
    0% {
        opacity: 0.7;
    }
    100% {
        transform: scale(1.4);
        opacity: 0;
    }
}
@keyframes fade-in {
    0% {
        opacity: 0;  
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 1;  
    }
}
// * * * Pop Animations * * * //
@keyframes pop-top {
    0% {
        transform: translate(0, 0) rotate(0);
        opacity: 0.4;
    }
    100% {
        transform: translate(0, -100px) rotate(0);
        opacity: 0;
    }
}
@keyframes pop-top-left {
    0% {
        transform: translate(0, 0) rotate(-55deg);
        opacity: 0.4;
    }
    100% {
        transform: translate(-100px, -50px) rotate(-55deg);
        opacity: 0;
    }
}
@keyframes pop-top-right {
    0% {
        transform: translate(0, 0) rotate(55deg);
        opacity: 0.4;
    }
    100% {
        transform: translate(100px, -50px) rotate(55deg);
        opacity: 0;
    }
}
@keyframes pop-bottom-right {
    0% {
        transform: translate(0, 0) rotate(135deg);
        opacity: 0.4;
    }
    100% {
        transform: translate(70px, 80px) rotate(135deg);
        opacity: 0;
    }
}
@keyframes pop-bottom-left {
    0% {
        transform: translate(0, 0) rotate(-135deg);
        opacity: 0.4;
    }
    100% {
        transform: translate(-70px, 80px) rotate(-135deg);
        opacity: 0;
    }
}
@keyframes first-bump-in {
    0% {
       transform: translateY(-65px);
       opacity: 1;
    }
    50% {
        transform: translateY(-80px); 
        opacity: 1;
    }
    100% {
        transform: translateY(-100px);
        opacity: 0;
    }
}

@keyframes bump-in {
    0% {
       transform: translateY(-80px) scale(0.9); 
       opacity: 1;
    }
    50% {
        transform: translateY(-80px) scale(1); 
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) scale(1);
        opacity: 0;
    }
}
@keyframes scaleAndBack {
    0% {
       transform: scale(1);
    }
    50% {
        transform: scale(1.15);
    }
    100% {
        transform: scale(1);
    }
}

@JonathanDn
Online, vanilla JS

1. local + online (sync is via Webdrive)
2. yes, demo it, not on js fiddle
3. later, but now just a demo to understand the code and test some changes
   Thanks

I'm checking this out https://stackoverflow.com/questions/9851878/is-there-a-download-function-in-jsfiddle

..Ok that was it.. just add /show to the js fiddle URL and then just save the page :-)
(not that clean though but it works)

I'm checking this out https://stackoverflow.com/questions/9851878/is-there-a-download-function-in-jsfiddle

..Ok that was it.. just add /show to the js fiddle URL and then just save the page :-)
(not that clean though but it works)

Awesome, I actually didn't know that ! I thought of uploading it all to codesandbox.io which shows the index.html boilerplate with all the script and style tags. But I guess that helps resolved your issue as well?

• Would you suggest adding a codesandbox example would be more inviting for new devs?

@topshef By the way I would love to see what you are doing with it if you would mind sharing with me :) You can also DM me that to my twitter profile: https://twitter.com/jodoron

@JonathanDn thanks a lot, yes I'll share it back on github and DM you :-)

@JonathanDn thanks a lot, yes I'll share it back on github and DM you :-)

Awesome!