HTMLify

body {
    display: grid;
    place-items: center;
    height: 100vh;
    background: #000;
  }
  
  .btn {
    background: #49d75c;
    border: none;
    outline: none;
    cursor: pointer;
    border-radius: 35px;
    font-size: 1rem;
    font-weight: bold;
    color: #fff;
    display: grid;
    place-items: center;
    transition: all 0.25s ease;
    position: relative;
    width: 210px;
    height: 60px;
    overflow: hidden;
  }
  
  .btn i {
    font-size: 1.45rem;
    position: absolute;
    left: 0px;
    pointer-events: none;
    z-index: 10;
    background: inherit;
    width: 60px;
    height: 60px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    transition: all 0.25s ease;
  }
  
  .btn .text {
    width: 130px;
    display: block;
    position: relative;
    pointer-events: none;
    transition: all 0.25s ease;
    position: absolute;
    left: 60px;
  }
  
  .loading-animate {
    position: absolute;
    width: 60px;
    height: 60px;
    z-index: 100;
    border-radius: 50%;
    top: 0;
    left: 0;
    display: grid;
    place-items: center;
    pointer-events: none;
    opacity: 0;
    transition: all 0.25s ease;
  }
  
  .loading-animate::after {
    content: "";
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-left: 3px solid #fff;
    animation: loading infinite 0.8s ease 0.05s;
    position: absolute;
  }
  
  .loading-animate::before {
    content: "";
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-left: 3px solid #fff;
    animation: loading infinite 0.8s linear;
    position: absolute;
    opacity: 0.6;
  }
  
  .btn.loading {
    width: 60px;
  }
  
  .btn.loading i {
    transform: rotate(-90deg);
    padding-bottom: 4px;
    padding-left: 3px;
  }
  
  .btn.loading .text {
    transform: translate(-140px);
  }
  
  .btn.loading .loading-animate {
    opacity: 1;
  }
  
  @keyframes loading {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
  }