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Asked: 2026-05-25T19:50:41+00:00

I try to get body width in Linux Firefox. document.body.scrollWidth is equal to width

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I try to get body width in Linux Firefox.

document.body.scrollWidth is equal to width which I can see in firefox window.

So when I changed window size, document.body.scrollWidth is changed.

But in Google Chrome, It is equal to body width.

My Firefox version is 6.0.

How can I get body width in Firefox/Linux?

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1 Answer

  1. Editorial Team

    Per http://dev.w3.org/csswg/cssom-view/#dom-element-scrollwidth scrollWidth on the <body> returns the ‘window size’ (or more precisely the actual width of the body box) in standards mode and the document content width in quirks mode (item 3 in the list).

    It sounds like your page is in standards mode. In which case document.documentElement.scrollWidth should do what you wan (item 2 in the list).

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