CSS position: fixed vs position: sticky Comparison

Here's a clear breakdown of the differences between these two positioning methods:

Key Differences
Behavior
fixed: Always stays in the same viewport position regardless of scrolling

sticky: Switches between relative and fixed positioning based on scroll position

Positioning Context
fixed: Positions relative to the viewport (browser window)

sticky: Positions relative to its nearest scrolling ancestor

Scroll Behavior
fixed: Never moves when scrolling

sticky: Acts normally until reaching a defined threshold, then "sticks"

Space Occupation
fixed: Removes element from normal document flow (no space reserved)

sticky: Maintains space in document flow when in "relative" mode

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