With the new improvements in HTML5, it's now possible to know the loading percentage of an image (or other files), to build a progress bar with real data?
Is at least possible to know in advance the size of an image (or other files) to fake this percentage more accurately?
All the info I found seems outdated, or perhaps it isn't possible yet. But a lot of websites shows this days percentage spinners and progress bars... how? Exists an usual fake trick?
Thank you.