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css position

时间: 2023-10-27 12:35:46 浏览: 71

CSS Position(定位)

CSS Position(定位) position 属性指定了元素的定位类型。 position 属性的五个值： fixed 定位元素的位置相对于浏览器窗口是固定位置。即使窗口是滚动的它也不会移动：实例 p.pos_fixed { position:fixed; top:30px; right:5px; } 注意： Fixed 定位在 IE7 和 IE8 下需要描述 !DOCTYPE 才能支持。 Fixed定位使元素的位置与文档流无关，因此不占据空间。 Fixed定位的元素和其他元素重叠。 relative 定位相对定位元素的定位是相对其正常位置。实例 h2.pos_

CSS position is a property that allows you to set the positioning of an element on a web page. There are four main values for the position property: static, relative, absolute, and fixed. - Static: This is the default value for the position property, and it means that the element is positioned in the normal flow of the document. You cannot use top, bottom, left, or right properties with static position. - Relative: This value positions the element relative to its normal position. You can use top, bottom, left, or right properties to adjust the position of the element relative to where it would normally be placed. - Absolute: This value positions the element relative to its nearest positioned ancestor. If there is no positioned ancestor, it is positioned relative to the document body. You can use top, bottom, left, or right properties to adjust the position of the element relative to its positioned ancestor. - Fixed: This value positions the element relative to the browser window, regardless of scrolling. You can use top, bottom, left, or right properties to adjust the position of the element relative to the window. Using the position property, you can create complex layouts and designs on a web page.

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