我目前的困惑是,即使我为div标签设置了更大的z-index值,在操作一些CSS之后它也不再是顶部了。
代码使用如下:
$('.lights').on('click',function(){
$('<div id="lightsOut"></div>').appendTo('body');
$('#lightsOut').css( {
opacity: 0,
width: $(document).width(),
height: $(document).height()
} )
.addClass('lightsOut')
.animate({opacity: 1}, 400);
$('#media').css( { "z-index": "10000" } );
});
.lightsOut {
position: absolute;
top: 0px;
left: 0px;
width: 0px;
height: 0px;
background-color: #000;
z-index: 9999;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<h4>Title</h4>
<div id="media">
<button class="lights">Lights Out</button>
<h4 style="color: grey">Another Title</h4>
</div>
</body>
单击“div media”元素时,我想将背景更改为黑色,同时仍显示“div media”元素。我怎样才能实现这种行为?
答案 0 :(得分:0)
申请positoin亲戚
$('#media').css( { "position": "relative" } );
下面的代码段
$('.lights').on('click',function(){
$('<div id="lightsOut"></div>').appendTo('body');
$('#lightsOut').css( {
opacity: 0,
width: $(document).width(),
height: $(document).height()
} )
.addClass('lightsOut')
.animate({opacity: 1}, 400);
$('#media').css( { "z-index": "10000" } );
$('#media').css( { "position": "relative" } );
});
&#13;
.lightsOut {
position: absolute;
top: 0px;
left: 0px;
width: 0px;
height: 0px;
background-color: #000;
z-index: 9999;
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<h4>Title</h4>
<div id="media">
<button class="lights">Lights Out</button>
<h4 style="color: grey">Another Title</h4>
</div>
</body>
&#13;