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Home/ Questions/Q 315139
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Editorial Team
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Editorial Team
Asked: May 12, 20262026-05-12T08:15:51+00:00 2026-05-12T08:15:51+00:00

I already asked a more general question, with a great answer. However, I want

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I already asked a more general question, with a great answer.

However, I want a more tricky centered floating popup:

If my page is 1000px high, and I’m viewing only the upper portion of it, I do not wish the popup to pop at 500px, but rather at the middle of the visible portion of the screen.

Is there a way to access the visible portion of the page in CSS?

Thanks

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  1. Editorial Team
    Editorial Team
    2026-05-12T08:15:51+00:00Added an answer on May 12, 2026 at 8:15 am

    you should use CSS (margin: 0 auto;) for horizontal centering and javascript (viewport height) for the vertical one.

    check this example:
    http://www.alistapart.com/d/footers/footer_variation1.html

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