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HTML

            
              <!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css">
	<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
	<title>Contact List App</title>
</head>
<body>
	<div class="container">
		<h1 class="center-align">
			<i class="medium material-icons">contacts</i> My Contacts
		</h1>
    <p class="center-align">Type a name to show search filter.</p>
		<input id="filterInput" type="text" class="text" placeholder="Search Names">
		<ul id="names" class="collection with-header">
			<li class="collection-header">
				<h5>A</h5>
			</li>
			<li class='collection-item'><a href='#'>Abigail Brennan</a></li>
			<li class='collection-item'><a href='#'>Adrien Freeman</a></li>
			<li class='collection-item'><a href='#'>Aidan Hardin</a></li>
			<li class='collection-item'><a href='#'>Alina Gould</a></li>
			<li class='collection-item'><a href='#'>Allan Mathews</a></li>
			<li class='collection-item'><a href='#'>Amari Brock</a></li>
			<li class='collection-item'><a href='#'>Amari Mcclure</a></li>
			<li class='collection-item'><a href='#'>Ari Ryan</a></li>
			<li class='collection-item'><a href='#'>Ariel Rice</a></li>
			<li class='collection-item'><a href='#'>Atticus Montes</a></li>
			<li class='collection-item'><a href='#'>Aubree Kirby</a></li>
			<li class="collection-header">
				<h5>B</h5>
			</li>
			<li class='collection-item'><a href='#'>Bailey Beard</a></li>
			<li class='collection-item'><a href='#'>Beatrice Faulkner</a></li>
			<li class='collection-item'><a href='#'>Braylen Rhodes</a></li>
			<li class='collection-item'><a href='#'>Brice Gates</a></li>
			<li class='collection-item'><a href='#'>Briley Molina</a></li>
			<li class="collection-header">
				<h5>C</h5>
			</li>
			<li class='collection-item'><a href='#'>Cadence Mcmahon</a></li>
			<li class='collection-item'><a href='#'>Camilla Mora</a></li>
			<li class='collection-item'><a href='#'>Camryn Irwin</a></li>
			<li class='collection-item'><a href='#'>Carl Case</a></li>
			<li class='collection-item'><a href='#'>Ciara Beard</a></li>
			<li class='collection-item'><a href='#'>Clarence Barnett</a></li>
			<li class='collection-item'><a href='#'>Courtney Mcintosh</a></li>
			<li class='collection-item'><a href='#'>Cynthia Raymond</a></li>
			<li class="collection-header">
				<h5>D</h5>
			</li>
			<li class='collection-item'><a href='#'>Danielle Novak</a></li>
			<li class='collection-item'><a href='#'>Dayami Watkins</a></li>
			<li class='collection-item'><a href='#'>Deja Humphrey</a></li>
			<li class='collection-item'><a href='#'>Devyn Hancock</a></li>
			<li class="collection-header">
				<h5>E</h5>
			</li>
			<li class='collection-item'><a href='#'>Eduardo Lloyd</a></li>
			<li class='collection-item'><a href='#'>Elyse Tran</a></li>
			<li class='collection-item'><a href='#'>Eric Bradshaw</a></li>
			<li class='collection-item'><a href='#'>Erin Gutierrez</a></li>
			<li class="collection-header">
				<h5>F</h5>
			</li>
			<li class='collection-item'><a href='#'>Fatima Bonilla</a></li>
			<li class='collection-item'><a href='#'>Fiona Pacheco</a></li>
			<li class='collection-item'><a href='#'>Francis Owen</a></li>
			<li class="collection-header">
				<h5>G</h5>
			</li>
			<li class='collection-item'><a href='#'>Gael Lindsey</a></li>
			<li class='collection-item'><a href='#'>Gemma Schmitt</a></li>
			<li class='collection-item'><a href='#'>Gregory Rodgers</a></li>
			<li class="collection-header">
				<h5>H</h5>
			</li>
			<li class='collection-item'><a href='#'>Hope Atkinson</a></li>
			<li class='collection-item'><a href='#'>Howard Preston</a></li>
			<li class='collection-item'><a href='#'>Hudson Duffy</a></li>
			<li class="collection-header">
				<h5>I</h5>
			</li>
			<li class='collection-item'><a href='#'>Ingrid Fernandez</a></li>
			<li class='collection-item'><a href='#'>Iyana Payne</a></li>
			<li class="collection-header">
				<h5>J</h5>
			</li>
			<li class='collection-item'><a href='#'>Jaliyah Mullins</a></li>
			<li class='collection-item'><a href='#'>Janiah Holden</a></li>
			<li class='collection-item'><a href='#'>Jared Hayden</a></li>
			<li class='collection-item'><a href='#'>Jason Kane</a></li>
			<li class='collection-item'><a href='#'>Jean Mccann</a></li>
			<li class='collection-item'><a href='#'>Jenny Ramsey</a></li>
			<li class='collection-item'><a href='#'>Joey White</a></li>
			<li class="collection-header">
				<h5>K</h5>
			</li>
			<li class='collection-item'><a href='#'>Kael Gibson</a></li>
			<li class='collection-item'><a href='#'>Kai Kennedy</a></li>
			<li class='collection-item'><a href='#'>Kaia Cameron</a></li>
			<li class='collection-item'><a href='#'>Kaitlin Gordon</a></li>
			<li class='collection-item'><a href='#'>Kasey Rush</a></li>
			<li class='collection-item'><a href='#'>Kayden Clements</a></li>
			<li class='collection-item'><a href='#'>Keaton Rich</a></li>
			<li class='collection-item'><a href='#'>Kendall Glenn</a></li>
			<li class='collection-item'><a href='#'>Kendra Carr</a></li>
			<li class='collection-item'><a href='#'>Kenley Madden</a></li>
			<li class='collection-item'><a href='#'>Kenyon Haynes</a></li>
			<li class='collection-item'><a href='#'>Keshawn Quinn</a></li>
			<li class='collection-item'><a href='#'>Kingston Bolton</a></li>
			<li class="collection-header">
				<h5>L</h5>
			</li>
			<li class='collection-item'><a href='#'>Lawrence Osborn</a></li>
			<li class='collection-item'><a href='#'>Layton Robbins</a></li>
			<li class='collection-item'><a href='#'>Leah Bray</a></li>
			<li class='collection-item'><a href='#'>Leia Juarez</a></li>
			<li class='collection-item'><a href='#'>Lila Wang</a></li>
			<li class='collection-item'><a href='#'>Luz Smith</a></li>
			<li class="collection-header">
				<h5>M</h5>
			</li>
			<li class='collection-item'><a href='#'>Maci Giles</a></li>
			<li class='collection-item'><a href='#'>Malaki Velez</a></li>
			<li class='collection-item'><a href='#'>Mallory Andrews</a></li>
			<li class='collection-item'><a href='#'>Manuel Atkins</a></li>
			<li class='collection-item'><a href='#'>Marley Holmes</a></li>
			<li class='collection-item'><a href='#'>Melvin Leblanc</a></li>
			<li class='collection-item'><a href='#'>Milton Mason</a></li>
			<li class='collection-item'><a href='#'>Mira Dunn</a></li>
			<li class="collection-header">
				<h5>N</h5>
			</li>
			<li class='collection-item'><a href='#'>Nyasia Hart</a></li>
			<li class="collection-header">
				<h5>O</h5>
			</li>

			<li class="collection-header">
				<h5>P</h5>
			</li>
			<li class='collection-item'><a href='#'>Payton Frey</a></li>
			<li class='collection-item'><a href='#'>Perla Woods</a></li>
			<li class="collection-header">
				<h5>Q</h5>
			</li>

			<li class="collection-header">
				<h5>R</h5>
			</li>
			<li class='collection-item'><a href='#'>Ramiro Orozco</a></li>
			<li class='collection-item'><a href='#'>Randall Vargas</a></li>
			<li class='collection-item'><a href='#'>Reed Day</a></li>
			<li class='collection-item'><a href='#'>Rigoberto Mosley</a></li>
			<li class='collection-item'><a href='#'>Rowan Miles</a></li>
			<li class='collection-item'><a href='#'>Ryan May</a></li>
			<li class="collection-header">
				<h5>S</h5>
			</li>
			<li class='collection-item'><a href='#'>Salvatore Li</a></li>
			<li class='collection-item'><a href='#'>Skyla Stanley</a></li>
			<li class='collection-item'><a href='#'>Skyler Hatfield</a></li>
			<li class='collection-item'><a href='#'>Solomon Conrad</a></li>
			<li class='collection-item'><a href='#'>Sullivan Kerr</a></li>
			<li class="collection-header">
				<h5>T</h5>
			</li>
			<li class='collection-item'><a href='#'>Talan Hughes</a></li>
			<li class='collection-item'><a href='#'>Taliyah Huerta</a></li>
			<li class='collection-item'><a href='#'>Todd Wilkinson</a></li>
			<li class='collection-item'><a href='#'>Trevin Salinas</a></li>
			<li class="collection-header">
				<h5>U</h5>
			</li>
			<li class='collection-item'><a href='#'>Uriah Trujillo</a></li>
			<li class="collection-header">
				<h5>V</h5>
			</li>
			<li class='collection-item'><a href='#'>Vanessa Shaffer</a></li>
			<li class='collection-item'><a href='#'>Vivian Whitney</a></li>
			<li class="collection-header">
				<h5>W</h5>
			</li>
			<li class='collection-item'><a href='#'>Walter Haynes</a></li>
			<li class="collection-header">
				<h5>X</h5>
			</li>

			<li class="collection-header">
				<h5>Y</h5>
			</li>

			<li class="collection-header">
				<h5>Z</h5>
			</li>
			<li class='collection-item'><a href='#'>Zander Knox</a></li>
						
		</ul>
	</div>
	<div class="container">
		
	</div>
</body>
</html>
!

CSS

            
              i.material-icons{
  margin-right: .2em;
}
!

JS

            
              //Get input element
		let filterInput = document.getElementById('filterInput');
		//Add event listener
		filterInput.addEventListener('keyup', filterNames);

		function filterNames(){
			//Get value of input
			let filterValue = document.getElementById('filterInput').value.toUpperCase();
			//Get names ul
			let ul = document.getElementById('names');
			//Get names li
			let li = ul.querySelectorAll('li.collection-item');
			//Loop through li
			for(let i = 0; i < li.length; i++){
				let a = li[i].getElementsByTagName('a')[0];
				//If matched
				if(a.innerHTML.toUpperCase().indexOf(filterValue) > -1){
					li[i].style.display = '';
				}else{
					li[i].style.display = 'none';
				}
			}
		};
		//Add icon to lists
		let li = document.querySelectorAll('li.collection-item');
		li.forEach(function(element){
			let i = document.createElement('i');
			i.innerHTML = 'account_circle';
			i.classList.add('material-icons');
			element.insertBefore(i, element.childNodes[0]);
			element.classList.add('valign-wrapper');
		});
!
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