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Alice7772017-05-13 23:04:31
css
Alice777, 2017-05-13 23:04:31

A fixed overlay overlays the browser's default scroll. Why?

A fixed overlay overlays the browser's default scroll. Why? For clarity: c81f1e020fa54effa4db4618b5f177cb.png
Mask code:
position: fixed;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: 1000
background color: black
opacity: 0.6
Maybe someone came across? What could it be?

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