Top-Edge (top→bottom)
Bottom-Edge (bottom→top)
Left-Edge (left→right)
Right-Edge (right→left)
none
.
top left
...
top
..
top right
...
right
....
bottom right
.....
bottom
......
bottom left
.......
left
.......
center
........
hover test
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Javascript
HTMLElement
HTMLElement
HTMLElement
HTMLElement
show
hide
pop
nohover