Experience in using the position attribute

Experience in using the position attribute

1. Use absolute in position to work with relative. If relative is not used, absolute uses the entire window as the reference. If relative is placed on the parent label of absolute, then, absolute uses the parent block label as the reference object to adjust the position. absolute uses the top, left, right, and bottom attributes to adjust the position.

2. the position fiexed is fixed. Problems I encountered during use:

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There is a problematic picture above, and the navigation bar is not fixed to the top.

Note: In the test, the position in the above image is fiexed instead of relative.

 

Because the position fiexed is not added with top: 0, it is not fixed to the top.

After top is added, my navigation bar becomes normal and will not leak a slit like that