Loading na Página

// HTML
<div class="loader">
  <svg class="spinner" width="65px" height="65px" viewBox="0 0 66 66" xmlns="http://www.w3.org/2000/svg">
    <circle class="path" fill="none" stroke-width="6" stroke-linecap="round" cx="33" cy="33" r="30"></circle>
  </svg>
</div><!-- /loader -->

// CSS
.loader {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: #fff;
  opacity: 0.9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  -webkit-animation: rotator 1.4s linear infinite;
  animation: rotator 1.4s linear infinite;
}

@-webkit-keyframes rotator {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(270deg);
    transform: rotate(270deg);
  }
}

@keyframes rotator {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(270deg);
    transform: rotate(270deg);
  }
}
.path {
  stroke-dasharray: 187;
  stroke-dashoffset: 0;
  -webkit-transform-origin: center;
  transform-origin: center;
  -webkit-animation: dash 1.4s ease-in-out infinite,
    colors 5.6s ease-in-out infinite;
  animation: dash 1.4s ease-in-out infinite, colors 5.6s ease-in-out infinite;
}

@-webkit-keyframes colors {
  0% {
    stroke: #4285f4;
  }
  25% {
    stroke: #de3e35;
  }
  50% {
    stroke: #f7c223;
  }
  75% {
    stroke: #1b9a59;
  }
  100% {
    stroke: #4285f4;
  }
}

@keyframes colors {
  0% {
    stroke: #4285f4;
  }
  25% {
    stroke: #de3e35;
  }
  50% {
    stroke: #f7c223;
  }
  75% {
    stroke: #1b9a59;
  }
  100% {
    stroke: #4285f4;
  }
}
@-webkit-keyframes dash {
  0% {
    stroke-dashoffset: 187;
  }
  50% {
    stroke-dashoffset: 46.75;
    -webkit-transform: rotate(135deg);
    transform: rotate(135deg);
  }
  100% {
    stroke-dashoffset: 187;
    -webkit-transform: rotate(450deg);
    transform: rotate(450deg);
  }
}
@keyframes dash {
  0% {
    stroke-dashoffset: 187;
  }
  50% {
    stroke-dashoffset: 46.75;
    -webkit-transform: rotate(135deg);
    transform: rotate(135deg);
  }
  100% {
    stroke-dashoffset: 187;
    -webkit-transform: rotate(450deg);
    transform: rotate(450deg);
  }
}

//JS
setTimeout(function() {
  $(".loader").fadeOut();
}, 300);