Probably the easiest / best way is to use Javascript for this. The main way I saw this is with a ready-made document handler that reveals all hidden materials.
$(document).ready(function() { $('*').show(); });
Of course, people like to see some kind of feedback about the "progress", so your site does not look badly encoded or as if the server was junk. Thus, the bootloader panel or something else.
As I mentioned above, the best place for these types of questions is Stack Overflow , and perhaps this will be moved there by a higher ranking person. At the same time, the issue of stack overflow is very similar here.
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