Layout / The visual dictionary
Fixed positioning.
Placement anchored to the viewport or window rather than the document flow.
Also calledfixed elementviewport anchored
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UI illustrationSee it in context
Always here ↗
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What it is
Placement anchored to the viewport or window rather than the document flow. Reserve enough content space so the fixed region does not cover essential controls.
When to use it
Use it for persistent navigation or actions that must remain available during scrolling.
Know the difference
Fixed elements do not scroll with content; sticky elements initially participate in normal flow.
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Across platforms
WebiOSiPadOSAndroidmacOSWindowsLinux
Web · iOS · iPadOS · Android · macOS · Windows · Linux
Web fixed positioning and native overlay placement need safe-area handling around device cutouts and system bars.
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Go to the source
Primary documentation for the pattern and its platform conventions.