// data uri test. // https://github.com/Modernizr/Modernizr/issues/14 // This test is asynchronous. Watch out. // in IE7 in HTTPS this can cause a Mixed Content security popup. // github.com/Modernizr/Modernizr/issues/362 // To avoid that you can create a new iframe and inject this.. perhaps.. (function(){ var datauri = new Image(); datauri.onerror = function() { Modernizr.addTest('datauri', function () { return false; }); }; datauri.onload = function() { Modernizr.addTest('datauri', function () { return (datauri.width == 1 && datauri.height == 1); }); }; datauri.src = "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw=="; })();