Responsive Morphing Circle Navigation With JavaScript And CSS

A responsive hamburger navigation system that morphs the hamburger toggle button into a fullscreen navigation using a little JavaScript and CSS transition & clip-path properties.

How to use it

1. Create a site navigation with a hamburger toggle button on the web page.

<nav>
  <div class="hamburger">
    <div class="line"></div>
    <div class="line"></div>
    <div class="line"></div>
  </div>
  <ul class="nav-links">
    <li><a href="#">CSS</a></li>
    <li><a href="#">Script</a></li>
    <li><a href="#">Com</a></li>
  </ul>
</nav>

2. The basic CSS styles for the regular horizontal menu.

nav {
  height: 10vh;
  background: #5b78c7;
}
.nav-links {
  display: flex;
  list-style: none;
  width: 50%;
  height: 100%;
  justify-content: space-around;
  align-items: center;
  margin-left: auto;
}
.nav-links li a {
  color: white;
  text-decoration: none;
  font-size: 16px;
}

3. Collapse the horizontal menu into a hamburger toggle button when the screen size is smaller than a specific viewport size.

@media screen and (max-width: 768px) {
  .line {
    width: 30px;
    height: 3px;
    background: white;
    margin: 5px;
  }
  nav {
    position: relative;
  }
  .hamburger {
    position: absolute;
    cursor: pointer;
    right: 5%;
    top: 50%;
    transform: translate(-5%, -50%);
    z-index: 2;
  }
  .nav-links {
    position: fixed;
    background: #5b78c7;
    height: 100vh;
    width: 100%;
    flex-direction: column;
    clip-path: circle(100px at 90% -10%);
    -webkit-clip-path: circle(100px at 90% -10%);
    transition: all 1s ease-out;
    pointer-events: none;
  }
  .nav-links.open {
    clip-path: circle(1000px at 90% -10%);
    -webkit-clip-path: circle(1000px at 90% -10%);
    pointer-events: all;
  }
  .landing {
    flex-direction: column;
  }
  .nav-links li {
    opacity: 0;
  }
  .nav-links li a {
    font-size: 25px;
  }
  .nav-links li:nth-child(1) {
    transition: all 0.5s ease 0.2s;
  }
  .nav-links li:nth-child(2) {
    transition: all 0.5s ease 0.4s;
  }
  .nav-links li:nth-child(3) {
    transition: all 0.5s ease 0.6s;
  }
  li.fade {
    opacity: 1;
  }
}

4. The main JavaScript to toggle CSS classes for the morphing animation.

const hamburger = document.querySelector(".hamburger");
const navLinks = document.querySelector(".nav-links");
const links = document.querySelectorAll(".nav-links li");
hamburger.addEventListener("click", () => {
  navLinks.classList.toggle("open");
  links.forEach(link => {
    link.classList.toggle("fade");
  });
});