Answers for "custom css loading"

nice css loader

/* loading */
.loader {
  position: absolute;
    top: 50%;  
    left: 50%; 
    transform: translate(-50%, -50%);
  border:3px solid #999;
  border-radius: 50%;
  border-top:3px solid #D10000;
  width: 30px;
  height: 30px;
  -webkit-animation: spin 2s linear infinite; /* Safari */
  animation: spin 2s linear infinite;
}

/* Safari */
@-webkit-keyframes spin {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

css loading

.Overlay {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  .LoadingContainer {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    .Spinner {
      color: #007bff;
    }
  }
}