simple preloader

preloader.txt

//HTML, include as 1st in body tag
  <div class="loader">
       <div class="spinner">
           
       </div>
   </div>

//CSS
.loader{
    width: 100%;
    height: 100%;
    background-color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    display: flex;
      align-items: center;
      justify-content: center;
}
.spinner {
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 100px;
  height: 100px;
  -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); }
}


//JS
$(window).on('load',function(){
 $('.loader').delay(1000).fadeOut(1000);
});