Follow Along Navigation

follow-along-navigation.markdown

Follow Along Navigation

Inspired by the slick navigation on Stripe's site, this is a navigation that has a follow along background. We use JavaScript to add/remove classes to handle the toggle. Then we use getBoundingClientRect() to transform a white background as the user moves across each dropdown link.

A Pen by Stan Williams on CodePen.

License.

index.html

<main>
  <header>
    <h1>Follow Along Navigation</h1>
    <p>Inspired by the slick navigation on Stripe's site, this is a navigation that has a follow along background. We use JavaScript to add/remove classes to handle the toggle. Then we use getBoundingClientRect() to transform a white background as the user moves across each dropdown link.</p>
  </header>
  <section class="content">
    <nav class="top">
      <div class="dropdownBackground">
        <span class="arrow"></span>
      </div>

      <ul class="cool">
        <li>
          <a href="#">About Me</a>
          <div class="dropdown dropdown1">
            <div class="bio">
              <img src="https://stanwilliams.org/wp-content/uploads/2018/01/Stan_Sweetwater_Gap_Beveled-256px.jpg">
              <p>Mostly retired engineer, musician,   electronics technician, web-developer, hiker, explorer,  lover of  nature,  and amateur photographer.  I'm an animal lover and just another of the  7 billion + humans on this planet. </p>
            </div>
          </div>
        </li>
        <li>
          <a href="#">Links</a>
          <ul class="dropdown courses">
            <li>
              <a href="https://stanwilliamsmusic.com.org">StanWilliamsMusic.com</a>
            </li>
            <li>
              <a href="https://soundcloud.com/stanwmusic">Stan's music on Soundcloud</a>
            </li>
            <li>
              <a href="https://www.youtube.com/watch?v=rjNahMTd7KQ&list=PL802C7FB249992F95" target="_blank">Music I've Listened To</a>
            </li>
            <li>
              <a href="https://stan.stream" target="_blank">My new blog</a>
            </li>
          </ul>
        </li>
        <li>
          <a href="#">Social Media</a>
          <ul class="dropdown dropdown3">
            <li><a class="button" href="http://twitter.com/stanssongs" target="_blank">Twitter</a></li>
            <li><a class="button" href="http://facebook.com/stanwilliamsmusic" target="_blank">Facebook</a></li>
            <li><a class="button" href="https://linkedin.com/in/stanwilliams1" target="_blank">LinkedIn</a></li>
          </ul>
        </li>
      </ul>
    </nav>
  </section>
</main>

script.typescript

const triggers = document.querySelectorAll('.cool > li');
const background = document.querySelector('.dropdownBackground');
const nav = document.querySelector('.top');

function handleEnter() {
  this.classList.add('trigger-enter');
  setTimeout(() => {
    if(this.classList.contains('trigger-enter')) {
      this.classList.add('trigger-enter-active');
      // prevents content from showing if you quickly move around
    }    
  }, 150);
  
  background.classList.add('open');
  
  const dropdown = this.querySelector('.dropdown'); // have to do this here because the dropdown can change
  const dropdownCoords = dropdown.getBoundingClientRect(); // relative to the page, can change based on other page content
  const navCoords = nav.getBoundingClientRect();
  
  const coords = {
    height: dropdownCoords.height,
    width: dropdownCoords.width,
    top: dropdownCoords.top - navCoords.top, // offset for non-anchored
    left: dropdownCoords.left - navCoords.left
  };
  
  background.style.setProperty('width', `${coords.width}px`);
  background.style.setProperty('height', `${coords.height}px`)
  background.style.setProperty('transform', `translate(${coords.left}px, ${coords.top}px`)
}

function handleLeave() {
  this.classList.remove('trigger-enter', 'trigger-enter-active');
  background.classList.remove('open');
}

triggers.forEach(trigger => trigger.addEventListener('mouseenter', handleEnter));
triggers.forEach(trigger => trigger.addEventListener('mouseleave', handleLeave));

style.scss

.content {
  background: none;
  box-shadow: none;
  height: 500px;
}

nav {
    position: relative;
    perspective: 600px;
  }

  .cool > li > a {
    color: $red;
    text-decoration: none;
    font-size: 20px;
    background: white;
    padding: 10px 20px;
    display: inline-block;
    margin: 20px;
    border-radius: 5px;
  }

  nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
  }

  .cool > li {
    position: relative;
    display: flex;
    justify-content: center;
  }

  .dropdown {
    opacity: 0;
    position: absolute;
    overflow: hidden;
    padding: 20px;
    top: -20px;
    border-radius: 2px;
    transition: all 0.5s;
    transform: translateY(100px);
    will-change: opacity;
    display: none;
  }

  .trigger-enter .dropdown {
    display: block;
  }

  .trigger-enter-active .dropdown {
    opacity: 1;
  }
  
  .dropdownBackground {
    width: 100px;
    height: 100px;
    position: absolute;
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 50px 100px rgba(50,50,93,.1), 0 15px 35px rgba(50,50,93,.15), 0 5px 15px rgba(0,0,0,.1);
    transition: all 0.3s, opacity 0.1s, transform 0.2s;
    transform-origin: 50% 0;
    display: flex;
    justify-content: center;
    opacity:0;
  }

  .dropdownBackground.open {
    opacity: 1;
  }

  .arrow {
    position: absolute;
    width: 20px;
    height: 20px;
    display: block;
    background: white;
    transform: translateY(-50%) rotate(45deg);
  }

  .bio {
    min-width: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1.7;
  }

  .bio img {
    float: left;
    margin-right: 20px;
    max-width: 40%;
  }

  .bio p {
    margin-bottom: 0;
  }

  .courses {
    min-width: 300px;
  }

  .courses li {
    padding: 10px 0;
    display: block;
    border-bottom: 1px solid rgba(0,0,0,0.2);
  }

  .dropdown a {
    text-decoration: none;
  }

  a.button {
    background: black;
    display: block;
    padding: 10px;
    color: $gray-lightest;
    margin-bottom: 10px;
    
    &:hover {
      color: $white;
    }
  }

  /* Matches Twitter, TWITTER, twitter, tWitter, TWiTTeR... */
  .button[href*=twitter] { background: #019FE9; }
  .button[href*=facebook] { background: #3B5998; }
  .button[href*=linkedin] { background: #0077B5; }

styles

<link href="https://codepen.io/colinlord/pen/db9ba42a2fd1bb4ad3b2c4898897abea" rel="stylesheet" />

Demo or fork: https://codepen.io/Stanssongs/full/WNveYvO

Demo or fork this and add your own info and images etc.: https://codepen.io/Stanssongs/full/WNveYvO