Loader Animation in CSS

The loading animation can make a difference in enhancing your user experience if you have content that takes too long to load.

In this tutorial we will learn how to create loader animation in CSS

HTML

<div class="loader"></div>

CSS

  .loader {
   position: relative;
   width: 2.5em;
   height: 2.5em;
   transform: rotate(165deg);
  }
  
  .loader:before, .loader:after {
   content: "";
   position: absolute;
   top: 50%;
   left: 50%;
   display: block;
   width: 0.5em;
   height: 0.5em;
   border-radius: 0.25em;
   transform: translate(-50%, -50%);
  }
  
  .loader:before {
   animation: before8 2s infinite;
  }
  
  .loader:after {
   animation: after6 2s infinite;
  }
  
  @keyframes before8 {
   0% {
    width: 0.5em;
  
      box-shadow: 1em -0.5em rgba(225, 20, 98, 0.75), -1em 0.5em rgba(111,
    202, 220, 0.75);
  
   }
  
   35% {
    width: 2.5em;
  
      box-shadow: 0 -0.5em rgba(225, 20, 98, 0.75), 0 0.5em rgba(111, 202,
    220, 0.75);
  
   }
  
   70% {
    width: 0.5em;
  
      box-shadow: -1em -0.5em rgba(225, 20, 98, 0.75), 1em 0.5em rgba(111,
    202, 220, 0.75);
  
   }
  
   100% {
  
      box-shadow: 1em -0.5em rgba(225, 20, 98, 0.75), -1em 0.5em rgba(111,
    202, 220, 0.75);
  
   }
  }
  
  @keyframes after6 {
   0% {
    height: 0.5em;
  
      box-shadow: 0.5em 1em rgba(61, 184, 143, 0.75), -0.5em -1em rgba(233,
    169, 32, 0.75);
  
   }
  
   35% {
    height: 2.5em;
  
      box-shadow: 0.5em 0 rgba(61, 184, 143, 0.75), -0.5em 0 rgba(233, 169,
    32, 0.75);
  
   }
  
   70% {
    height: 0.5em;
  
      box-shadow: 0.5em -1em rgba(61, 184, 143, 0.75), -0.5em 1em rgba(233,
    169, 32, 0.75);
  
   }
  
   100% {
  
      box-shadow: 0.5em 1em rgba(61, 184, 143, 0.75), -0.5em -1em rgba(233,
    169, 32, 0.75);
  
   }
  }
  
  .loader {
   position: absolute;
   top: calc(50% - 1.25em);
   left: calc(50% - 1.25em);
  }

This is a CSS loader made in an elegant, but simple way: no need for JavaScript at all. You can simply just copy and paste it anywhere you'd like to show that activity is loading.

Thanks for Reading