page loader html css javascript

   /*--------------add html after body----*
<div id="loader-wrapper">
    <div id="loader_page_start"></div>


</div>


<script>

$( window ).load(function() {
    $('body').addClass('loaded');
    })

</script>
          
#loader-wrapper {
    background-color: rgb(255, 255, 255);
    border: medium none;
    cursor: wait;
    height: 100%;
    left: 0;
    margin: 0;
    opacity: 1;
    padding: 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}
#loader_page_start {
    display: block;
    position: relative;
    left: 50%;
    top: 50%;
    width: 150px;
    height: 150px;
    margin: -75px 0 0 -75px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: #3498db;

    -webkit-animation: spin 2s linear infinite; /* Chrome, Opera 15+, Safari 5+ */
    animation: spin 2s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
}

    #loader_page_start:before {
        content: "";
        position: absolute;
        top: 5px;
        left: 5px;
        right: 5px;
        bottom: 5px;
        border-radius: 50%;
        border: 3px solid transparent;
        border-top-color: #e74c3c;

        -webkit-animation: spin 3s linear infinite; /* Chrome, Opera 15+, Safari 5+ */
        animation: spin 3s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
    }

    #loader_page_start:after {
        content: "";
        position: absolute;
        top: 15px;
        left: 15px;
        right: 15px;
        bottom: 15px;
        border-radius: 50%;
        border: 3px solid transparent;
        border-top-color: #f9c922;

        -webkit-animation: spin 1.5s linear infinite; /* Chrome, Opera 15+, Safari 5+ */
          animation: spin 1.5s linear infinite; /* Chrome, Firefox 16+, IE 10+, Opera */
    }

    @-webkit-keyframes spin {
        0%   {
            -webkit-transform: rotate(0deg);  /* Chrome, Opera 15+, Safari 3.1+ */
            -ms-transform: rotate(0deg);  /* IE 9 */
            transform: rotate(0deg);  /* Firefox 16+, IE 10+, Opera */
        }
        100% {
            -webkit-transform: rotate(360deg);  /* Chrome, Opera 15+, Safari 3.1+ */
            -ms-transform: rotate(360deg);  /* IE 9 */
            transform: rotate(360deg);  /* Firefox 16+, IE 10+, Opera */
        }
    }
    @keyframes spin {
        0%   {
            -webkit-transform: rotate(0deg);  /* Chrome, Opera 15+, Safari 3.1+ */
            -ms-transform: rotate(0deg);  /* IE 9 */
            transform: rotate(0deg);  /* Firefox 16+, IE 10+, Opera */
        }
        100% {
            -webkit-transform: rotate(360deg);  /* Chrome, Opera 15+, Safari 3.1+ */
            -ms-transform: rotate(360deg);  /* IE 9 */
            transform: rotate(360deg);  /* Firefox 16+, IE 10+, Opera */
        }
    }
   
.loaded #loader-wrapper {
    transform: translateY(+100%);
    transition: all 0.3s ease-out 1s;
    visibility: hidden;
}