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                ``` position的常見的四個屬性值:relative,absolute,fixed,static. 一般都要配合left,top,right,bottom屬性使用。 ``` 1. static:默認位置,設置static之后,他始終會處于頁面流給予的位置(static會忽略top,right,left,bottom) 2. relative:位置設置為relation之后,相對定位,給它設置top,left,right,bottom.將會相對于它原來應該的位置發生相應的變化。 3. absolute:絕對定位,如果它的父元素有position屬性,并且屬性值為absolute或者relative時,它會依據父容器進行偏移。**如果父元素沒有設置position屬性的話,那么偏移量將會以body為準。**, 4. fixed:位置被設置為fixed的元素,可定為與相對于瀏覽器窗口的指定坐標。不論窗口是否滾動,都將固定。 5. 設置position的元素將不會在標準流中不占位置。
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