Animated Tab Bar using CSS & JavaScript


Here is a simple animated tab bar made using HTML, CSS & JavaScript. Made originally by abxlfazl khxrshidi.

The codes are separated in three parts, so copy all three parts combine them and after that run the code. You can use three separate files for HTML, CSS & Js or you can just use one index.html file.

Html Code

Here is the Html Code.

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Animated Tab Bar</title>
</head>
<body>
  <menu class="menu">   
    <button class="menu__item active" style="--bgColorItem: #ff8c00;" >
      <svg class="icon" viewBox="0 0 24 24">
        <path d="M3.8,6.6h16.4"/>
        <path d="M20.2,12.1H3.8"/>
        <path d="M3.8,17.5h16.4"/>
      </svg>
    </button>

    <button class="menu__item" style="--bgColorItem: #f54888;">
      <svg class="icon" viewBox="0 0 24 24">
        <path  d="M6.7,4.8h10.7c0.3,0,0.6,0.2,0.7,0.5l2.8,7.3c0,0.1,0,0.2,0,0.3v5.6c0,0.4-0.4,0.8-0.8,0.8H3.8
        C3.4,19.3,3,19,3,18.5v-5.6c0-0.1,0-0.2,0.1-0.3L6,5.3C6.1,5,6.4,4.8,6.7,4.8z"/>
        <path  d="M3.4,12.9H8l1.6,2.8h4.9l1.5-2.8h4.6"/>
      </svg>
    </button>

    <button class="menu__item" style="--bgColorItem: #4343f5;" >
      <svg class="icon" viewBox="0 0 24 24">
      <path  d="M3.4,11.9l8.8,4.4l8.4-4.4"/>
      <path  d="M3.4,16.2l8.8,4.5l8.4-4.5"/>
      <path  d="M3.7,7.8l8.6-4.5l8,4.5l-8,4.3L3.7,7.8z"/>
    </button>

    <button class="menu__item" style="--bgColorItem: #e0b115;" > 
      <svg class="icon" viewBox="0 0 24 24" >
        <path  d="M5.1,3.9h13.9c0.6,0,1.2,0.5,1.2,1.2v13.9c0,0.6-0.5,1.2-1.2,1.2H5.1c-0.6,0-1.2-0.5-1.2-1.2V5.1
          C3.9,4.4,4.4,3.9,5.1,3.9z"/>
        <path  d="M4.2,9.3h15.6"/>
        <path  d="M9.1,9.5v10.3"/>
    </button>

    <button class="menu__item" style="--bgColorItem:#65ddb7;">
      <svg class="icon" viewBox="0 0 24 24" >
        <path  d="M5.1,3.9h13.9c0.6,0,1.2,0.5,1.2,1.2v13.9c0,0.6-0.5,1.2-1.2,1.2H5.1c-0.6,0-1.2-0.5-1.2-1.2V5.1
          C3.9,4.4,4.4,3.9,5.1,3.9z"/>
        <path  d="M5.5,20l9.9-9.9l4.7,4.7"/>
        <path  d="M10.4,8.8c0,0.9-0.7,1.6-1.6,1.6c-0.9,0-1.6-0.7-1.6-1.6C7.3,8,8,7.3,8.9,7.3C9.7,7.3,10.4,8,10.4,8.8z"/>
      </svg>
    </button>
    <div class="menu__border"></div>
  </menu>
  <div class="svg-container">
    <svg viewBox="0 0 202.9 45.5" >
      <clipPath id="menu" clipPathUnits="objectBoundingBox" transform="scale(0.0049285362247413 0.021978021978022)">
        <path  d="M6.7,45.5c5.7,0.1,14.1-0.4,23.3-4c5.7-2.3,9.9-5,18.1-10.5c10.7-7.1,11.8-9.2,20.6-14.3c5-2.9,9.2-5.2,15.2-7
          c7.1-2.1,13.3-2.3,17.6-2.1c4.2-0.2,10.5,0.1,17.6,2.1c6.1,1.8,10.2,4.1,15.2,7c8.8,5,9.9,7.1,20.6,14.3c8.3,5.5,12.4,8.2,18.1,10.5
          c9.2,3.6,17.6,4.2,23.3,4H6.7z"/>
      </clipPath>
    </svg>
  </div>
</body>
</html>

CSS Code

Here is the CSS Code.

html {

    box-sizing: border-box;
    --bgColorMenu : #1d1d27;
    --duration: .7s;    

}

html *,
html *::before,
html *::after {

    box-sizing: inherit;

}

body{
    
    margin: 0;
    display: flex;
    height: 100vh;
    overflow: hidden;
    align-items: center;
    justify-content: center;
    background-color: #ffb457;
    -webkit-tap-highlight-color: transparent;
    transition: background-color var(--duration);

}

.menu{

    margin: 0;
    display: flex;
    /* Works well with 100% width  */
    width: 32.05em;
    font-size: 1.5em;
    padding: 0 2.85em;
    position: relative;
    align-items: center;
    justify-content: center;
    background-color: var(--bgColorMenu);
    
}

.menu__item{
    
    all: unset;
    flex-grow: 1;
    z-index: 100;
    display: flex;
    cursor: pointer;
    position: relative;
    border-radius: 50%;
    align-items: center;
    will-change: transform;
    justify-content: center;
    padding: 0.55em 0 0.85em;
    transition: transform var(--timeOut , var(--duration));
    
}

.menu__item::before{
    
    content: "";
    z-index: -1;
    width: 4.2em;
    height: 4.2em;
    border-radius: 50%;
    position: absolute;
    transform: scale(0);
    transition: background-color var(--duration), transform var(--duration);
    
}


.menu__item.active {

    transform: translate3d(0, -.8em , 0);

}

.menu__item.active::before{
    
    transform: scale(1);
    background-color: var(--bgColorItem);

}

.icon{
    
    width: 2.6em;
    height: 2.6em;
    stroke: white;
    fill: transparent;
    stroke-width: 1pt;
    stroke-miterlimit: 10;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 400;
    
}

.menu__item.active .icon {

    animation: strok 1.5s reverse;
    
}

@keyframes strok {

    100% {

        stroke-dashoffset: 400;

    }

}

.menu__border{

    left: 0;
    bottom: 99%;
    width: 10.9em;
    height: 2.4em;
    position: absolute;
    clip-path: url(#menu);
    will-change: transform;
    background-color: var(--bgColorMenu);
    transition: transform var(--timeOut , var(--duration));
    
}

.svg-container {

    width: 0;
    height: 0;
}


@media screen and (max-width: 50em) {
    .menu{
        font-size: .8em;
    }
}

JavaScript Code

Here is the JavaScript Code.

// Designed by:  Mauricio Bucardo
// Original image:
// https://dribbble.com/shots/5619509-Animated-Tab-Bar

"use strict";

const body = document.body;
const bgColorsBody = ["#ffb457", "#ff96bd", "#9999fb", "#ffe797", "#cffff1"];
const menu = body.querySelector(".menu");
const menuItems = menu.querySelectorAll(".menu__item");
const menuBorder = menu.querySelector(".menu__border");
let activeItem = menu.querySelector(".active");

function clickItem(item, index) {

  menu.style.removeProperty("--timeOut");

  if (activeItem == item) return;

  if (activeItem) {
    activeItem.classList.remove("active");
  }


  item.classList.add("active");
  body.style.backgroundColor = bgColorsBody[index];
  activeItem = item;
  offsetMenuBorder(activeItem, menuBorder);


}

function offsetMenuBorder(element, menuBorder) {

  const offsetActiveItem = element.getBoundingClientRect();
  const left = Math.floor(offsetActiveItem.left - menu.offsetLeft - (menuBorder.offsetWidth - offsetActiveItem.width) / 2) + "px";
  menuBorder.style.transform = `translate3d(${left}, 0 , 0)`;

}

offsetMenuBorder(activeItem, menuBorder);

menuItems.forEach((item, index) => {

  item.addEventListener("click", () => clickItem(item, index));

});

window.addEventListener("resize", () => {
  offsetMenuBorder(activeItem, menuBorder);
  menu.style.setProperty("--timeOut", "none");
});

Complete Code

Here is the complete code for one single index.html file.

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Animated Tab Bar</title>
<style>
html {

    box-sizing: border-box;
    --bgColorMenu : #1d1d27;
    --duration: .7s;    

}

html *,
html *::before,
html *::after {

    box-sizing: inherit;

}

body{
    
    margin: 0;
    display: flex;
    height: 100vh;
    overflow: hidden;
    align-items: center;
    justify-content: center;
    background-color: #ffb457;
    -webkit-tap-highlight-color: transparent;
    transition: background-color var(--duration);

}

.menu{

    margin: 0;
    display: flex;
    /* Works well with 100% width  */
    width: 32.05em;
    font-size: 1.5em;
    padding: 0 2.85em;
    position: relative;
    align-items: center;
    justify-content: center;
    background-color: var(--bgColorMenu);
    
}

.menu__item{
    
    all: unset;
    flex-grow: 1;
    z-index: 100;
    display: flex;
    cursor: pointer;
    position: relative;
    border-radius: 50%;
    align-items: center;
    will-change: transform;
    justify-content: center;
    padding: 0.55em 0 0.85em;
    transition: transform var(--timeOut , var(--duration));
    
}

.menu__item::before{
    
    content: "";
    z-index: -1;
    width: 4.2em;
    height: 4.2em;
    border-radius: 50%;
    position: absolute;
    transform: scale(0);
    transition: background-color var(--duration), transform var(--duration);
    
}


.menu__item.active {

    transform: translate3d(0, -.8em , 0);

}

.menu__item.active::before{
    
    transform: scale(1);
    background-color: var(--bgColorItem);

}

.icon{
    
    width: 2.6em;
    height: 2.6em;
    stroke: white;
    fill: transparent;
    stroke-width: 1pt;
    stroke-miterlimit: 10;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 400;
    
}

.menu__item.active .icon {

    animation: strok 1.5s reverse;
    
}

@keyframes strok {

    100% {

        stroke-dashoffset: 400;

    }

}

.menu__border{

    left: 0;
    bottom: 99%;
    width: 10.9em;
    height: 2.4em;
    position: absolute;
    clip-path: url(#menu);
    will-change: transform;
    background-color: var(--bgColorMenu);
    transition: transform var(--timeOut , var(--duration));
    
}

.svg-container {

    width: 0;
    height: 0;
}


@media screen and (max-width: 50em) {
    .menu{
        font-size: .8em;
    }
}
</style>
</head>
<body>
  <menu class="menu">   
    <button class="menu__item active" style="--bgColorItem: #ff8c00;" >
      <svg class="icon" viewBox="0 0 24 24">
        <path d="M3.8,6.6h16.4"/>
        <path d="M20.2,12.1H3.8"/>
        <path d="M3.8,17.5h16.4"/>
      </svg>
    </button>

    <button class="menu__item" style="--bgColorItem: #f54888;">
      <svg class="icon" viewBox="0 0 24 24">
        <path  d="M6.7,4.8h10.7c0.3,0,0.6,0.2,0.7,0.5l2.8,7.3c0,0.1,0,0.2,0,0.3v5.6c0,0.4-0.4,0.8-0.8,0.8H3.8
        C3.4,19.3,3,19,3,18.5v-5.6c0-0.1,0-0.2,0.1-0.3L6,5.3C6.1,5,6.4,4.8,6.7,4.8z"/>
        <path  d="M3.4,12.9H8l1.6,2.8h4.9l1.5-2.8h4.6"/>
      </svg>
    </button>

    <button class="menu__item" style="--bgColorItem: #4343f5;" >
      <svg class="icon" viewBox="0 0 24 24">
      <path  d="M3.4,11.9l8.8,4.4l8.4-4.4"/>
      <path  d="M3.4,16.2l8.8,4.5l8.4-4.5"/>
      <path  d="M3.7,7.8l8.6-4.5l8,4.5l-8,4.3L3.7,7.8z"/>
    </button>

    <button class="menu__item" style="--bgColorItem: #e0b115;" > 
      <svg class="icon" viewBox="0 0 24 24" >
        <path  d="M5.1,3.9h13.9c0.6,0,1.2,0.5,1.2,1.2v13.9c0,0.6-0.5,1.2-1.2,1.2H5.1c-0.6,0-1.2-0.5-1.2-1.2V5.1
          C3.9,4.4,4.4,3.9,5.1,3.9z"/>
        <path  d="M4.2,9.3h15.6"/>
        <path  d="M9.1,9.5v10.3"/>
    </button>

    <button class="menu__item" style="--bgColorItem:#65ddb7;">
      <svg class="icon" viewBox="0 0 24 24" >
        <path  d="M5.1,3.9h13.9c0.6,0,1.2,0.5,1.2,1.2v13.9c0,0.6-0.5,1.2-1.2,1.2H5.1c-0.6,0-1.2-0.5-1.2-1.2V5.1
          C3.9,4.4,4.4,3.9,5.1,3.9z"/>
        <path  d="M5.5,20l9.9-9.9l4.7,4.7"/>
        <path  d="M10.4,8.8c0,0.9-0.7,1.6-1.6,1.6c-0.9,0-1.6-0.7-1.6-1.6C7.3,8,8,7.3,8.9,7.3C9.7,7.3,10.4,8,10.4,8.8z"/>
      </svg>
    </button>

    <div class="menu__border"></div>

  </menu>

  <div class="svg-container">
    <svg viewBox="0 0 202.9 45.5" >
      <clipPath id="menu" clipPathUnits="objectBoundingBox" transform="scale(0.0049285362247413 0.021978021978022)">
        <path  d="M6.7,45.5c5.7,0.1,14.1-0.4,23.3-4c5.7-2.3,9.9-5,18.1-10.5c10.7-7.1,11.8-9.2,20.6-14.3c5-2.9,9.2-5.2,15.2-7
          c7.1-2.1,13.3-2.3,17.6-2.1c4.2-0.2,10.5,0.1,17.6,2.1c6.1,1.8,10.2,4.1,15.2,7c8.8,5,9.9,7.1,20.6,14.3c8.3,5.5,12.4,8.2,18.1,10.5
          c9.2,3.6,17.6,4.2,23.3,4H6.7z"/>
      </clipPath>
    </svg>
  </div>
      <script>
// Designed by:  Mauricio Bucardo
// Original image:
// https://dribbble.com/shots/5619509-Animated-Tab-Bar

"use strict";

const body = document.body;
const bgColorsBody = ["#ffb457", "#ff96bd", "#9999fb", "#ffe797", "#cffff1"];
const menu = body.querySelector(".menu");
const menuItems = menu.querySelectorAll(".menu__item");
const menuBorder = menu.querySelector(".menu__border");
let activeItem = menu.querySelector(".active");

function clickItem(item, index) {

  menu.style.removeProperty("--timeOut");

  if (activeItem == item) return;

  if (activeItem) {
    activeItem.classList.remove("active");
  }


  item.classList.add("active");
  body.style.backgroundColor = bgColorsBody[index];
  activeItem = item;
  offsetMenuBorder(activeItem, menuBorder);


}

function offsetMenuBorder(element, menuBorder) {

  const offsetActiveItem = element.getBoundingClientRect();
  const left = Math.floor(offsetActiveItem.left - menu.offsetLeft - (menuBorder.offsetWidth - offsetActiveItem.width) / 2) + "px";
  menuBorder.style.transform = `translate3d(${left}, 0 , 0)`;

}

offsetMenuBorder(activeItem, menuBorder);

menuItems.forEach((item, index) => {

  item.addEventListener("click", () => clickItem(item, index));

});

window.addEventListener("resize", () => {
  offsetMenuBorder(activeItem, menuBorder);
  menu.style.setProperty("--timeOut", "none");
});
    </script>
</body>
</html>

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