<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Full screen navigation</title>
    <link rel="stylesheet" href="./style.css" />
    <script
      src="https://kit.fontawesome.com/81c2c05f29.js"
      crossorigin="anonymous"
    ></script>
  </head>
  <body>
    <nav class="full-screen-nav">
      <div class="backdrop"></div>
      <ul>
        <li>
          <a href="#"><i class="fas fa-home"></i> Home</a>
        </li>
        <li>
          <a href="#"><i class="fas fa-user-alt"></i> About</a>
        </li>
        <li>
          <a href="#"><i class="fas fa-tasks"></i> Projects</a>
        </li>
        <li>
          <a href="#"><i class="fas fa-comment-dots"></i> Testimonials</a>
        </li>
        <li>
          <a href="#"><i class="fas fa-at"></i> Contact</a>
        </li>
      </ul>
    </nav>

    <div class="content">
      <button class="trigger"><i class="fas fa-bars"></i></button>
    </div>

    <script src="./script.js"></script>
  </body>
</html>

@import url('https://fonts.googleapis.com/css?family=Roboto:400,500,900&display=swap');

/* General styles */

* {
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Roboto', sans-serif;
  background: #e8ebf7;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-size: 14px;
  position: relative;
}

/* Open button */
.trigger {
  background: #ffa500;
  outline: 0;
  padding: 8px 15px;
  color: #fff;
  border: 0;
  border-radius: 5px;
  font-size: 2em;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
  transition: 0.15s ease-in-out;
  cursor: pointer;
}
.trigger:hover {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
}

/* Nav position and opening class */
.full-screen-nav {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  transition: 0.2s ease-in-out;
  display: none;
}
.open-nav {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Backgroup position and animation */
.backdrop {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  cursor: pointer;
  animation: fadeIn 0.2s ease-in-out forwards;
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* List item styling & animation */
ul {
  z-index: 9999;
  position: relative;
}
ul li {
  list-style: none;
  text-align: center;
  margin-bottom: 30px;
  animation: 0.25s ease-in-out animateList forwards;
}
ul li:last-child {
  margin-bottom: 0;
}
@keyframes animateList {
  from {
    margin-top: -60px;
    opacity: 0;
  }
  to {
    margin-top: 0;
    opacity: 1;
  }
}

/* Item links styles and hover effect*/
ul li a {
  text-decoration: none;
  color: #ccc;
  font-size: 3em;
  font-weight: 900;
  text-transform: uppercase;
  transition: 0.15s ease-in-out;
}
ul li a:hover,
ul li a i {
  color: #ffa500;
}

const trigger = document.querySelector('.trigger');
const nav = document.querySelector('.full-screen-nav');
const backdrop = document.querySelector('.backdrop');

trigger.addEventListener('click', () => nav.classList.add('open-nav'));
backdrop.addEventListener('click', () => nav.classList.remove('open-nav'));

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.