I need to change BODY display param in DOM before page start painting elements.
My plan is:
1. (Need only white screen) Do before rendering something like document.getElementsByTagName('body')[0].style = 'display: none;'
2. in ::OnLoadEnd remove/add some elements
3. in the end of ::OnLoadEnd document.getElementsByTagName('body')[0].style = 'display: block;'
P.S. I don't have too much experience in C++. If possible, then in more detail