<style>
    .x {
        justify-content: center;
        align-self: center;
        z-index: 100;
    }
    .hidden {
        display: none;
        position: unset;
    }
</style>
<div id="loaderarea">
    <div class="x">
        <div class="bounce1"></div>
        <div class="bounce2"></div>
        <div class="bounce3"></div>
    </div>
</div>
<script>
    document.oncontextmenu = () => {
        return false
    }
    document.onselectstart = () => {
        return false
    }
    document.body.style.overflowY = "hidden"
    document.body.style.overflowX = "hidden"
    window.onload = () => {
        document.getElementById("loaderarea").classList.add('hidden')
        document.body.style.overflowY = ""
        document.body.style.overflowX = "hidden"
        document.oncontextmenu = () => {
            return true
        }
        document.onselectstart = () => {
            return true
        }
    }
</script>