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43 lines
2.1 KiB
HTML
43 lines
2.1 KiB
HTML
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<html>
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<head>
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<style>
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HTML {margin-top:2em; font-family:sans-serif}
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HTML {border:solid lime 8px; padding:32px; background:green; color:white}
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A.header-button {margin-top:.5em; margin-right: 1em;}
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</style>
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</head>
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<meta name="crc" content=4049295789>
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<body>
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<a name="intro""><h2>Introduction</h2></a>
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This is a test of a document that has a fixed
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<div style="position:fixed; top:0; left:0; width:100%; height:2em; background:#cccccc">
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<a class=header-button style="margin-left:.5em" href=#intro>Introduction</a>
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<a class=header-button href="#fixed">Fixed Positioning</a>
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<a class=header-button href="#conclusion">Conclusion</a>
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</div>
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element along the top edge of the document. Notice that as the document scrolls the
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fixed element doesn't move, because the fixed element is attached to the viewport.
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<p>This example is very different from the next example which uses fixed positioning
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to create a frame-like presentation. This example shows how you could use fixed positioning
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to create a quick table of contents.
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<p>Some of the other things this test shows are the use of margin, border, and padding on
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the HTML element. It also shows scrolling of the viewport: because the document's initial
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containing block (HTML element) is larger than the viewport, there's a vertical scrollbar.
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It's the viewport that's scrolling, not the HTML element which is growing to accomodate
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the document's content.
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<p>This is loosely modeled after one of the tests in Ian Hickson's <i>Evil</i>
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Test Suite.
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<p>
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<a name="fixed""><h2>Fixed Positioning</h2></a>
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Fixed positioning is a subcategory of absolute positioning. The only
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difference is that for a fixed positioned box, the containing block is established by the viewport.
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<p>For continuous media, fixed boxes do not move when the document is scrolled. In this respect, they
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are similar to fixed background images. For paged media, boxes with fixed positions are repeated on
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every page.
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<p>
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<a name="conclusion"><h2>Conclusion</h2></a>
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There are plenty of interesting things you can do with fixed positioning. This example shows
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a fixed header, and the next example shows a frame-like presentation.
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</body>
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</html>
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