How to show loading percentage of iframe tag with javascript? I am using iframe tag and my program takes some time to load my program. So I am thinking off to show the user how much it is being loaded yet now. I searched about it and I got to know that it's not possible to do it with HTML5, so I guess it can be done with js

EDIT:

<iframe width="800" height="600" src="https://www.greenfoot.org/scenarios/26460?embed=true" style="-webkit-transform:scale(0.4);"></iframe>