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Editorial Team
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Asked: 2026-05-28T20:37:43+00:00

i notice there’s this functionality on 9gag.com. on the homepage, the ‘Y u no

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i notice there’s this functionality on 9gag.com. on the homepage, the ‘Y u no signup’ button is on the right. but as you scroll down, the button is hooked onto the header banner. how is this done?? this can be also seen on this very page whereby the yellow panel(similar Questions) on the right freeze when u scroll this page down. in facebook timeline, as you scroll down there will be a absolute div which appear on the top which contain options for timeline, now, status, photo, place and event.

r they using javascript or is this something new in html5??

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1 Answer

  1. Editorial Team

    when the user scrolls down the computer checks for the amount scrolled.Let’s say you scroll down with 50 px .The computer checks if the scroll distance is equal or bigger than 50.
    If so then it will display that new Y u no Signup?!
    and then if the scroll distance is smaller than 50 the top button simply isn’t displayed anymore.

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