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The top property specifies the top edge of an element.
top 属性可以指定与其最近一个具有定位设置的父对象顶边相关的位置
Note: If the "position" property has a value of "static", the "top" property has no effect.
注意:”position“属性值为"static"的话,"top"属性就没有效果
Inherited: No
继承性:无
This example sets the top edge of the paragraph 20 px below the top edge of the window: This example sets the top edge of the paragraph 20 px above the top edge of the window: |
值 | 描述 |
---|---|
auto | Lets the browser calculate the top position 让浏览器决定top定位 |
% | Sets the top position in % from the top edge of the window 以窗口大小的百分比来决定top定位 |
length | Sets the top position in px, cm, etc. from the top edge of the window. Negative values are allowed 用px,cm这些单位来决定top定位.可以使用负数 |