How to remove the glare of the page before performing the animation?

Who knows why when the page loads all of its content at first for a split second, then disappears, appears and then runs an animation to fade-in blocks. Animation I is done using js.
July 12th 19 at 17:19
2 answers
July 12th 19 at 17:21
It all depends on how this is implemented smooth animation. When I used Angular Material, I solved the problem this crutch: push the white rectangle on the whole screen after loading JS remove-om
It's not even a crutch, but the whole wheelchair))) - Emerson_Thi commented on July 12th 19 at 17:24
July 12th 19 at 17:23
display: none;
on page load give the unit you want to animate.
And triggered the animation (you might need to configure), it will become visible.

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