CSS:当我为段落设置ID时,hover效果不工作 [英] CSS :hover effect not working when I set an ID to the paragraph
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问题描述
我有以下css3转换以轻松的效果:
HTML
< div class =button>
< a href =#onMouseOver =clicksound.playclip()>< / a>
< p id =myIdclass =top>< / p>
< / div>
CSS
* {
padding:0;
margin:0;
}
.button {
width:180px;
margin-top:45px;
}
.button a {
display:block;
height:40px;
width:180px;
/ * TYPE * /
color:black;
font:17px / 50px Helvetica,Verdana,sans-serif;
text-decoration:none;
text-align:center;
text-transform:uppercase;
}
.button a {
background:url(http://imageshack.com/a/img819/761/dqj.gif);
margin:-50 0 0 0;
z-index:-1;
}
p#myId {
background:url(http://imageshack.com/a/img854/1921/9ft3.png);
display:block;
height:40px;
width:167px;
margin:-40px 0 0 5px;
z-index:-1;
/ * TYPE * /
text-align:center;
font:12px / 45px Helvetica,Verdana,sans-serif;
color:#fff;
/ * POSITION * /
position:absolute;
/ * TRANSITION * /
-webkit-transition:margin 0.1s ease;
-moz-transition:margin 0.1s ease;
-o-transition:margin 0.1s ease;
-ms-transition:margin 0.1s ease;
transition:margin 0.1s ease;
}
.button:hover .top {
margin:-67px 0 0 5px;
line-height:35px;
}
/ * ACTIVE * /
.button:active .top {
margin:-70px 0 0 5px;
}
如果我更改 p#myId
selector to p
在CSS中,它的工作原理(按钮上升悬停),否则不会。
$ b问题是,处理你的
:hover
行为的选择器具有低于 ( p#id
选择器)的规则。 更改此
.button:hover .top {
到此
.button:hover#myId.top {
会解决问题: 运行示例
您还可以将ID应用于父对象< div id =container>
),然后使用
#container .button:hover .top {
示例:
I have the following css3 transition with ease effect:
HTML
<div class="button">
<a href="#" onMouseOver="clicksound.playclip()"></a>
<p id="myId" class="top"></p>
</div>
CSS
* {
padding: 0;
margin: 0;
}
.button {
width: 180px;
margin-top: 45px;
}
.button a {
display: block;
height: 40px;
width: 180px;
/*TYPE*/
color: black;
font: 17px/50px Helvetica, Verdana, sans-serif;
text-decoration: none;
text-align: center;
text-transform: uppercase;
}
.button a {
background:url(http://imageshack.com/a/img819/761/dqj.gif);
margin: -50 0 0 0;
z-index: -1;
}
p#myId {
background: url(http://imageshack.com/a/img854/1921/9ft3.png);
display: block;
height: 40px;
width: 167px;
margin: -40px 0 0 5px;
z-index:-1;
/*TYPE*/
text-align: center;
font: 12px/45px Helvetica, Verdana, sans-serif;
color: #fff;
/*POSITION*/
position: absolute;
/*TRANSITION*/
-webkit-transition: margin 0.1s ease;
-moz-transition: margin 0.1s ease;
-o-transition: margin 0.1s ease;
-ms-transition: margin 0.1s ease;
transition: margin 0.1s ease;
}
.button:hover .top {
margin: -67px 0 0 5px;
line-height: 35px;
}
/*ACTIVE*/
.button:active .top {
margin: -70px 0 0 5px;
}
If I change the p#myId
selector to p
in CSS, it works (the button goes up on hover), otherwise it won't.
解决方案
The problem is that the selector handling your :hover
behavior has a lower Specificity than the rule for the default behavior (p#id
selector).
Changing this
.button:hover .top {
to this
.button:hover #myId.top {
will solve the problem: Running example
You can also apply an id to a parent object (lets' say <div id="container">
), and then use
#container .button:hover .top {
A must-read: Specifics on CSS Specificity
Examples:
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