html and css

 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>Document</title>
     <link href="https://fonts.googleapis.com/css?family=Roboto+Condensed&display=swap" rel="stylesheet">
     <style>
     
      
 * {
   box-sizing: border-box;
}
 body {
   text-align: center;
   display: flex;
   height: 100vh;
   width: 100%;
   justify-content: center;
   align-items: center;
   padding: 0 20px;
   background-image: url("https://www.toptal.com/designers/subtlepatterns/patterns/debut_light.png");
}
 .nav {
   display: inline-flex;
   position: relative;
   overflow: hidden;
   max-width: 100%;
   background-color: #fff;
   padding: 0 20px;
   border-radius: 40px;
   box-shadow: 0 10px 40px rgba(159, 162, 177, .8);
}
 .nav-item {
   color: #83818c;
   padding: 20px;
   text-decoration: none;
   transition: 0.3s;
   margin: 0 6px;
   z-index: 1;
   font-family: 'Roboto Condensed', sans-serif;
   font-weight: 500;
   position: relative;
}
 .nav-item:before {
   content: "";
   position: absolute;
   bottom: -6px;
   left: 0;
   width: 100%;
   height: 5px;
   background-color: #dfe2ea;
   border-radius: 8px 8px 0 0;
   opacity: 0;
   transition: 0.3s;
}
 .nav-item:not(.is-active):hover:before {
   opacity: 1;
   bottom: 0;
}
 .nav-item:not(.is-active):hover {
   color: #333;
}
 .nav-indicator {
   position: absolute;
   left: 0;
   bottom: 0;
   height: 4px;
   transition: 0.4s;
   height: 5px;
   z-index: 1;
   border-radius: 8px 8px 0 0;
}
 @media (max-width: 580px) {
   .nav {
     overflow: auto;
  }
}
 
     </style>
 </head>
 <body>
     <nav class="nav">
  <a href="#" class="nav-item is-active" active-color="orange">HOME</a>
  <a href="#" class="nav-item" active-color="green">CONTACT</a>
  <a href="#" class="nav-item" active-color="blue">ABOUT</a>
  <a href="#" class="nav-item" active-color="red">LOACATIONS</a>
  <a href="#" class="nav-item" active-color="rebeccapurple">TESTIMONIALS</a>
  <span class="nav-indicator"></span>
</nav>
<script src="snake.js">
   
    </script>
 </body>
 </html>

    "use strict";

var indicator = document.querySelector('.nav-indicator');
var items = document.querySelectorAll('.nav-item');

function handleIndicator(el) {
  items.forEach(function (item) {
    item.classList.remove('is-active');
    item.removeAttribute('style');
  });
  indicator.style.width = "".concat(el.offsetWidth, "px");
  indicator.style.left = "".concat(el.offsetLeft, "px");
  indicator.style.backgroundColor = el.getAttribute('active-color');
  el.classList.add('is-active');
  el.style.color = el.getAttribute('active-color');
}

items.forEach(function (item, index) {
  item.addEventListener('click', function (e) {
    handleIndicator(e.target);
  });
  item.classList.contains('is-active') && handleIndicator(item);
});

在线演示让链接同时具备两种打开方式