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HTML

              
                <div class="container">
	<h3>
		Enter all of the choices divided by a comma (','). <br />
		Press enter when you're done.
	</h3>
	<textarea id="textarea" placeholder="Enter choices here..."></textarea>	
	<div id="tags"></div>
</div>








<!-- SOCIAL PANEL HTML -->
<div class="social-panel-container">
	<div class="social-panel">
		<p>Created with <i class="fa fa-heart"></i> by
			<a target="_blank" href="https://florin-pop.com">Florin Pop</a></p>
		<button class="close-btn"><i class="fas fa-times"></i></button>
		<h4>Get in touch on</h4>
		<ul>
			<li>
				<a href="https://www.patreon.com/florinpop17" target="_blank">
					<i class="fab fa-discord"></i>
				</a>
			</li>
			<li>
				<a href="https://twitter.com/florinpop1705" target="_blank">
					<i class="fab fa-twitter"></i>
				</a>
			</li>
			<li>
				<a href="https://linkedin.com/in/florinpop17" target="_blank">
					<i class="fab fa-linkedin"></i>
				</a>
			</li>
			<li>
				<a href="https://facebook.com/florinpop17" target="_blank">
					<i class="fab fa-facebook"></i>
				</a>
			</li>
			<li>
				<a href="https://instagram.com/florinpop17" target="_blank">
					<i class="fab fa-instagram"></i>
				</a>
			</li>
		</ul>
	</div>
</div>
<button class="floating-btn">
	Get in Touch
</button>

<div class="floating-text">
	Part of <a href="https://florin-pop.com/blog/2019/09/100-days-100-projects" target="_blank">#100Days100Projects</a>
</div>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Muli:300&display=swap');

* {
	box-sizing: border-box;
}

body {
	background-color: #2B88F0;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	min-height: 100vh;
	font-family: 'Muli', sans-serif;
	margin: 0;
	padding: 10px;
	text-align: center;
}

h3 {
	color: #fff;
	margin: 10px 0 20px;
}

.container {
	width: 500px;
	max-width: 100%;
}

textarea {
	border: none;
	display: block;
	font-family: inherit;
	font-size: 16px;
	padding: 10px;
	margin: 0 0 20px;
	height: 100px;
	width: 100%;
}

.tag {
	background-color: #f0932b;
	border-radius: 50px;
	color: #fff;
	display: inline-block;
	font-size: 14px;
	padding: 10px 20px;
	margin: 0 5px 10px 0;
}

.tag.highlight {
	background-color: #273c75;
}










/* SOCIAL PANEL CSS */
.social-panel-container {
	position: fixed;
	right: 0;
	bottom: 80px;
	transform: translateX(100%);
	transition: transform 0.4s ease-in-out;
}

.social-panel-container.visible {
	transform: translateX(-10px);
}

.social-panel {	
	background-color: #fff;
	border-radius: 16px;
	box-shadow: 0 16px 31px -17px rgba(0,31,97,0.6);
	border: 5px solid #001F61;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	font-family: 'Muli';
	position: relative;
	height: 169px;	
	width: 370px;
	max-width: calc(100% - 10px);
}

.social-panel button.close-btn {
	border: 0;
	color: #97A5CE;
	cursor: pointer;
	font-size: 20px;
	position: absolute;
	top: 5px;
	right: 5px;
}

.social-panel button.close-btn:focus {
	outline: none;
}

.social-panel p {
	background-color: #001F61;
	border-radius: 0 0 10px 10px;
	color: #fff;
	font-size: 14px;
	line-height: 18px;
	padding: 2px 17px 6px;
	position: absolute;
	top: 0;
	left: 50%;
	margin: 0;
	transform: translateX(-50%);
	text-align: center;
	width: 235px;
}

.social-panel p i {
	margin: 0 5px;
}

.social-panel p a {
	color: #FF7500;
	text-decoration: none;
}

.social-panel h4 {
	margin: 20px 0;
	color: #97A5CE;	
	font-family: 'Muli';	
	font-size: 14px;	
	line-height: 18px;
	text-transform: uppercase;
}

.social-panel ul {
	display: flex;
	list-style-type: none;
	padding: 0;
	margin: 0;
}

.social-panel ul li {
	margin: 0 10px;
}

.social-panel ul li a {
	border: 1px solid #DCE1F2;
	border-radius: 50%;
	color: #001F61;
	font-size: 20px;
	display: flex;
	justify-content: center;
	align-items: center;
	height: 50px;
	width: 50px;
	text-decoration: none;
}

.social-panel ul li a:hover {
	border-color: #FF6A00;
	box-shadow: 0 9px 12px -9px #FF6A00;
}

.floating-btn {
	border-radius: 26.5px;
	background-color: #001F61;
	border: 1px solid #001F61;
	box-shadow: 0 16px 22px -17px #03153B;
	color: #fff;
	cursor: pointer;
	font-size: 16px;
	line-height: 20px;
	padding: 12px 20px;
	position: fixed;
	bottom: 20px;
	right: 20px;
	z-index: 999;
}

.floating-btn:hover {
	background-color: #ffffff;
	color: #001F61;
}

.floating-btn:focus {
	outline: none;
}

.floating-text {
	background-color: #001F61;
	border-radius: 10px 10px 0 0;
	color: #fff;
	font-family: 'Muli';
	padding: 7px 15px;
	position: fixed;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	text-align: center;
	z-index: 998;
}

.floating-text a {
	color: #FF7500;
	text-decoration: none;
}

@media screen and (max-width: 480px) {

	.social-panel-container.visible {
		transform: translateX(0px);
	}
	
	.floating-btn {
		right: 10px;
	}
}
              
            
!

JS

              
                const tagsEl = document.getElementById('tags');
const textarea = document.getElementById('textarea');

// focus by default
textarea.focus();

textarea.addEventListener('keyup', (e) => {
	// create a tag for all the inputs separated by a comma
	createTags(e.target.value);
	
	// check if the enter key is pressed
	if(e.key === 'Enter') {
		// empty textarea
		// used setTimeout to add a little delay in order to clean the input
		setTimeout(() => {
			e.target.value = '';
		}, 10)
		
		// start randomizer
		randomSelect();
	}
});

function createTags(input) {
	const tags = input.split(',').filter(tag => tag.trim() !== '').map(tag => tag.trim());
	
	// clean up the tags first
	tagsEl.innerHTML = '';
	
	// map over the tags and add them to the tagsEl container
	tags.forEach(tag => {
		const tagEl = document.createElement('span');
		tagEl.classList.add('tag');
		tagEl.innerText = tag;
		tagsEl.appendChild(tagEl);
	})
}

function randomSelect() {
	const times = 30;
	
	const interval = setInterval(() => {
		const randomTag = pickRandomTag();
		
		highlightTag(randomTag);
		
		// remove the highlight after a while
		setTimeout(() => {
			unhighlightTag(randomTag);
		}, 100);
	}, 100);
	
	// allow times * 100 ms for the tags to randomly "highlight" themselves
	// then pick another tag
	setTimeout(() => {
		clearInterval(interval);
		
		setTimeout(() => {
			const randomTag = pickRandomTag();
			
			highlightTag(randomTag)
		}, 100);
	}, times * 100);
}

function pickRandomTag() {
	const tags = document.querySelectorAll('.tag');
	return tags[Math.floor(Math.random() * tags.length)];
}

function highlightTag(tag) {
	tag.classList.add('highlight');
}

function unhighlightTag(tag) {
	tag.classList.remove('highlight');
}

// SOCIAL PANEL JS
const floating_btn = document.querySelector('.floating-btn');
const close_btn = document.querySelector('.close-btn');
const social_panel_container = document.querySelector('.social-panel-container');

floating_btn.addEventListener('click', () => {
	social_panel_container.classList.toggle('visible')
});

close_btn.addEventListener('click', () => {
	social_panel_container.classList.remove('visible')
});
              
            
!
999px

Console