Reload a Page One Time After 5 Seconds

snippet.html

<script>
window.onload = function() {
    setTimeout(function(){
        if(!window.location.hash) {
            window.location = window.location + '#loaded';
            window.location.reload();
        } else {
            document.querySelector('body').classList.add('reloaded');
        }
    }, 5000); // Time to wait in milliseconds. Change as needed
}
</script>