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Editorial Team
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Asked: 2026-05-11T18:04:25+00:00

I just wonder if it is possible to only use CSS but not javascript

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I just wonder if it is possible to only use CSS but not javascript to style a DIV that will cover up the whole content area exactly? (note: whole content, not just the viewport). It seems not possible because the <body> element has some margin, and it seems like there is no easy way to style the div to include that margin width and height of the body element. But in fact is it possible?

Update: sorry, a requirement is that we can’t set the margin of <body> to 0… (update2: say, if we need to make it into a library and can’t ask all people who use it to set the body to have margin 0)

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1 Answer

  1. Editorial Team

    If the <body> margin is set, then couldn’t you use negative margins on the <div> to override the <body> margins? I understand <body> margins can vary between browsers. If the <body> has a margin of 10px, then style your div like so:

    div#mydiv {
margin: -10px;
}

    You’d use the same principle to override padding (if applicable).

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