css position
时间: 2023-10-21 12:37:30 浏览: 89
CSS position property is used to set the position of an element on a web page. It specifies the type of positioning method used for an element (static, relative, absolute, fixed, or sticky) and determines how the element is placed relative to its parent or the viewport.
The position property values are:
1. static: It is the default value and the element is positioned according to the normal flow of the document.
2. relative: The element is positioned relative to its normal position. It can be moved from its original position using the top, bottom, left, and right properties.
3. absolute: The element is positioned relative to its nearest positioned ancestor element. If there is no positioned ancestor, it is positioned relative to the initial containing block. It can also be moved using the top, bottom, left, and right properties.
4. fixed: The element is positioned relative to the viewport and does not move when the page is scrolled. It can also be moved using the top, bottom, left, and right properties.
5. sticky: The element is positioned based on the user's scroll position. It is positioned relative to its nearest ancestor element with a scrolling mechanism (overflow: auto, overflow: scroll, or overflow: hidden). It switches between fixed and relative positioning depending on the scroll position.
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