滚动鼠标时悬停div闪烁

Question

I have a div that appears when hovering over another div.

However when I try to move the mouse over the div that appears it flickers. I understand this is happening because of my CSS, but can not figure out what I should do to rectify.

 .hoverbase { width: 300px; height: 300px; position: relative; } .hovertop { height: 200px; width: 200px; border: 2px solid red; background-color: white; position: absolute; top: 50px; left: 50px; margin: auto; visibility: hidden; } .hoverbase a:hover+.hovertop { visibility: visible; }

 <div class='hoverbase'> <a href=http://www.google.com.au> <img src='https://fakeimg.pl/300x300/949598/888888/' /></a> <div class='hovertop'> <a href=http://google.com.au> <h2>Project HA</h2> </a> </div> </div>

View on jsFiddle

Answer 1

As you seem to be aware, .hovertop flickers because of quick alternation between hovering and not hovering. When .hovertop is visible and the mouse is over it, the :hover action of .hoverbase is cancelled and .hovertop disappears. At that point, .hovertop is no longer covering .hoverbase and the :hover action is reinstated. This alternation happens quickly and repeats forever as long as your mouse is over .hovertop , resulting in a flickering effect.

Include .hovertop in your :hover state selector. That way, it will remain visible whether the mouse is over .hoverbase or .hovertop .

.hoverbase a:hover + .hovertop,
.hovertop:hover { /* << added this */
    visibility:visible; 
 }

In English, this translates to: If the mouse is over .hoverbase OR .hovertop , show .hovertop .

Working example:

 .hoverbase { width: 300px; height: 300px; position: relative; } .hovertop { height: 200px; width: 200px; border: 2px solid red; background-color: white; position: absolute; top: 50px; left: 50px; margin: auto; visibility: hidden; } .hoverbase a:hover+.hovertop, .hovertop:hover { visibility: visible; }

 <div class='hoverbase'> <a href=http://www.google.com.au> <img src='//via.placeholder.com/350x150' /></a> <div class='hovertop'> <a href=http://google.com.au> <h2>Project HA</h2> </a> </div> </div>