When you search for a solution for full-screen overlay, the most website provides solutions using JavaScript or jQuery. The following solution is using CSS and JavaScript of jQuery. Here we are going to create a page loader window those overlays an existing HTML page and disabling all links and bringing into focus on the page loader window.
CSS code
<style>
.overlay {
background: #e9e9e9;
display: none;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
opacity: 0.5;
}
#loader {
-moz-border-bottom-colors: none;
-moz-border-left-colors: none;
-moz-border-right-colors: none;
-moz-border-top-colors: none;
animation: spin 2s linear infinite;
border-color: #3498db #f3f3f3 #f3f3f3;
border-image: none;
border-radius: 50%;
border-style: solid;
border-width: 16px;
height: 120px;
left: 50%;
margin: -75px 0 0 -75px;
position: absolute;
top: 50%;
width: 120px;
z-index: 1;
}
@-webkit-keyframes spin {
0% { -webkit-transform: rotate(0deg); }
100% { -webkit-transform: rotate(360deg); }
}
@keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
</style>
HTML code
<body>
<div id="loaderbg" style="position: fixed; top: 0px; left: 0px; background: rgba(0, 0, 0, 0.6) none repeat scroll 0% 0%;
z-index: 5; width: 100%; height: 100%; display: none;">
<div id="loader"></div>
</div>
</body>
jQuery/JavaScript code
<script>
function showPageloader() {
document.getElementById("loaderbg").style.display = "";
}
function hidePageloader() {
document.getElementById("loaderbg").style.display = "none";
}
</script>