SY Loader, Client Side

SY Loader

<!DOCTYPE html>
<html>
<head>
    <title>Hello, world!</title>
	<meta charset="utf-8">
    
    <script>
        if (sessionStorage.getItem("isWAAPISupported") === null) {
            alert(typeof(sessionStorage.isWAAPISupported));
            alert("Hold on");
        }
        else if (sessionStorage.getItem("isWAAPISupported") === "false") {
            var polyfill = document.createElement("SCRIPT");
            polyfill.src = "https://cdnjs.cloudflare.com/ajax/libs/web-animations/2.3.1/web-animations.min.js";
            document.head.appendChild(polyfill);
        }
        window.addEventListener("load", function() {
            if (typeof(document.body.animate) === "undefined") {
                sessionStorage.setItem("isWAAPISupported", false);
                //window.location.reload();
                //console.log("Web animations API not natively supported , please include the polyfill from https://cdnjs.cloudflare.com/ajax/libs/web-animations/2.3.1/web-animations.min.js .");   
                //var polyfill = document.createElement("SCRIPT");
                //polyfill.src = "https://cdnjs.cloudflare.com/ajax/libs/web-animations/2.3.1/web-animations.min.js";
                //document.head.appendChild(polyfill);
            }
            alert(document.body.animate);
            
        });
    </script>
</head>
<body>
    
</body>
</html>


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