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CSS

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HTML 

              
                <div class="container">
  <form>
    <div class="input-group">
      <input type="text" id="search" placeholder="Search..." autocomplete="off">
      <label for="search"><i class="fas fa-search"></i></label>
    </div>
    
    <div class="suggestion-list hidden">
    </div>
  </form>
  
  <div id="apps">
    <div class="app">
      <i class="fab fa-adobe"></i>
      <p>Adobe</p>
    </div>
    
    <div class="app">
      <i class="fab fa-android"></i>
      <p>Android</p>
    </div>
    
    <div class="app">
      <i class="fab fa-apple"></i>
      <p>Apple</p>
    </div>
    
    <div class="app">
      <i class="fab fa-aws"></i>
      <p>AWS</p>
    </div>
    
    <div class="app">
      <i class="fab fa-behance"></i>
      <p>Behance</p>
    </div>
    
    <div class="app">
      <i class="fab fa-bitcoin"></i>
      <p>Bitcoin</p>
    </div>
    
    <div class="app">
      <i class="fab fa-chrome"></i>
      <p>Chrome</p>
    </div>
    
    <div class="app">
      <i class="fab fa-codepen"></i>
      <p>Codepen</p>
    </div>
    
    <div class="app">
      <i class="fab fa-dribbble"></i>
      <p>Dribbble</p>
    </div>
    
    <div class="app">
      <i class="fab fa-docker"></i>
      <p>Docker</p>
    </div>
    
    <div class="app">
      <i class="fab fa-dropbox"></i>
      <p>Dropbox</p>
    </div>
    
    <div class="app">
      <i class="fab fa-drupal"></i>
      <p>Drupal</p>
    </div>
    
    <div class="app">
      <i class="fab fa-edge"></i>
      <p>Edge</p>
    </div>
    
    <div class="app">
      <i class="fab fa-firefox"></i>
      <p>Firefox</p>
    </div>
    
    <div class="app">
      <i class="fab fa-font-awesome"></i>
      <p>Font Awesome</p>
    </div>
    
    <div class="app">
      <i class="fab fa-github"></i>
      <p>Github</p>
    </div>
    
    <div class="app">
      <i class="fab fa-google"></i>
      <p>Google</p>
    </div>
    
    <div class="app">
      <i class="fab fa-google-drive"></i>
      <p>Google Drive</p>
    </div>
    
    <div class="app">
      <i class="fab fa-google-play"></i>
      <p>Google Play</p>
    </div>
    
    <div class="app">
      <i class="fab fa-google-plus"></i>
      <p>Google Plus</p>
    </div>
  </div>
</div>
!

CSS 

              
                * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Nunito', sans-serif;
}

body {
  background-color: #110e17;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 60px 15px;
}

form {
  max-width: 80%;
  margin: 0 auto;
  position: relative;
}

.input-group {
  position: relative;
}

label {
  position: absolute;
  right: 2%;
  top: 50%;
  transform: translatey(-50%);
  color: rgba(0, 0, 0, 0.08);
  transition: all 0.2s ease;
}

input {
  width: 100%;
  padding: 8px 30px 8px 12px;
  border: 2px solid rgba(0, 0, 0, 0.08);
  outline: none;
  font-size: 16px;
  box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.06);
  color: #F27121;
  font-weight: bold;
  letter-spacing: 1px;
  border-radius: 1px;
  transition: all 0.2s ease;
}

input:focus {
  border-color: #F27121;
}

input:focus + label {
  transform: scale(1.05) translatey(-50%);
  color: #F27121;
}

#apps {
  margin-top: 42px;
}

.app {
  display: inline-block;
  width: 20%;
  margin: 0 2.2% 24px;
  padding: 12px 6px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  transition: all 0.2s ease;
}

.app:hover {
  border-color: rgba(255, 255, 255, 0.5);
}

.app i {
  font-size: 2.4em;
  color: #fff;
}

.app p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
  margin-top: 6px;
  transition: 0.2s all ease;
}

.app:hover p {
  color: rgba(255, 255, 255, 0.8);
}

.suggestion-list {
  background-color: #fff;
  padding: 18px 24px 6px 12px;
  border-radius: 0 0 6px 6px;
  position: absolute;
  width: 100%;
  margin-top: 0px;
  border: 2px solid #F27121;
  border-top: none;
}

.suggestion-list.hidden {
  display: none;
}

.suggestion-list p {
  margin-bottom: 12px;
}

.suggestion-list i {
  margin-right: 12px;
  color: #F27121;
}
!

JS 

              
                var all_apps = document.querySelectorAll('.app');
var search = document.querySelector('#search');
var listContainer = document.querySelector('.suggestion-list');

var app_list = [];

for (let i = 0; i < all_apps.length; i++) {
  let app_title = all_apps[i].querySelector('p').innerText.toLowerCase();
  let app_icon = all_apps[i].querySelector('i').classList.value;

  let obj = {};
  obj.app_title = app_title;
  obj.app_icon = app_icon;

  app_list.push(obj);
}

search.addEventListener('keyup', generateAppList);
search.addEventListener('blur', hideAppList);

function generateAppList(event) {
  var fragment = document.createDocumentFragment();

  var userInput = event.target.value.toLowerCase();

  if (userInput.length === 0) {
    listContainer.classList.add('hidden');
    return false;
  }

  listContainer.innerHTML = '';
  listContainer.classList.remove('hidden');

  var filteredList = app_list.filter(function (arr) {
    return arr.app_title.includes(userInput);
  });

  if (filteredList.length === 0) {
    let paragraph = document.createElement('p');
    paragraph.innerText = 'No app found';
    fragment.appendChild(paragraph);
  }

  else {
    for (let i = 0; i < filteredList.length; i++) {
      let paragraph = document.createElement('p');
      let icon = document.createElement('i');
      let span = document.createElement('span');

      icon.classList.value = filteredList[i].app_icon;
      span.innerText = filteredList[i].app_title;
      paragraph.appendChild(icon);
      paragraph.appendChild(span);
      fragment.appendChild(paragraph);
    }
  }

  listContainer.appendChild(fragment);
}

function hideAppList() {
  listContainer.classList.add('hidden');
}
!
999px

Console