... the progress, so don’t depend on it for anything. That being said, you can certainly update the progress bar.myLongRunningFunction.onprogress = function(prog) { if(prog.lengthComputable) { progressBar.max ... indeterminate progress bar.) To show that the progress is at about sixty percent, you would put this in the HTML:<progress id=”fixedProgress” value=”60” max=”100”></progress>Setting ... Good.Using the progress barIf you use the progress control I used in the “Determinate progress status” section without any parameters, you get the standard Windows 8 loading status bar, with the...