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style #71

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ynchuan opened this issue Dec 13, 2019 · 0 comments

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ynchuan commented Dec 13, 2019

position:fixed 相对window窗口定位，大小与缩放窗口一样，z-index参与层级规则排序，即同级层级高则高，不同层级可通过寻找offsetParent找到同级，再次比较

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