css :hover pseudo-class not working

问题

I've got a CSS :hover pseudo-class that is not producing any results.

I was messing around with some image gallery code, and I've managed to get this snippet that doesn't work. I can't figure out why. Some of the weirder CSS rules regarding size here are because these divs normally contain images. I removed the images for simplicity, but left the rules in.

Other :hover elements on the same page are working.

I'm not sure what else to say about the problem, since this is so basic. I'm probably missing something really obvious.

JSFiddle here - http://jsfiddle.net/GbxCM/

回答1:

In some cases (mostly with absolute positioning), you cannot apply a :hover pseudo-class to something with display: inline-block;. (If you have Chrome, use inspect element and add the :hover trait yourself--notice, it will work perfectly! The browser just doesn't register the :hover itself.)

So, I went ahead and replaced this with float: left;, added a margin (to simulate the inline-block look), and changed the br to a clear. The result is in this jsFiddle.

回答2:

If I'm guessing correctly what you're trying to do, then you don't need to change the positioning or any of that. The only change I can see you wanting to make is changing the background color. Here's the fiddle I made to clarify that response.

Here's the code for readability's sake:

HTML

<div class="wrapper">
    <div class="squareswrapsolo"></div>
    <div class="squareswrapsolo"></div>
    <div class="squareswrapsolo"></div>
    <div class="squareswrapsolo"></div>
    <br>
    <div class="squareswrapsolo"></div>
    <div class="squareswrapsolo"></div>
    <div class="squareswrapsolo"></div>
    <div class="squareswrapsolo"></div>
</div>​

CSS

.wrapper {
    height: 600px;
    width: 600px;
    overflow: hidden;
    position: relative;
}

.squareswrapsolo {
    height: 100px;
    width: 100px;
    display: inline-block;
    overflow: hidden;
    background: #ccc;
}
.squareswrapsolo:hover {
    background: #000;
}​

来源：https://stackoverflow.com/questions/12361244/css-hover-pseudo-class-not-working