嵌套DIV是否正确使用不透明度? [英] Proper use of opacity with nested DIVs?

问题描述

因此，我正在尝试创建一个类似Lightlight的感觉.我创建了一个#blackout div和一个#enlargedBOX div.

So I'm trying to create a lightbox like feel. I created a #blackout div and an #enlargedBOX div.

#blackout div的不透明度设置为90％，因为我希望后台网站仅显示一点点，但是我不希望我的#enlargedBOX div使用相同的不透明度.似乎#blackout将其自身的不透明性强加于其内部的任何内容上.我该如何阻止呢?

The #blackout div has it's opacity set to 90%, because I want the background website to show through just a bit, however i do NOT want my #enlargedBOX div to use that same opacity. It seems that #blackout forces its own opacity onto anything within itself. How can i stop that?

<div id="blackout">
<div id="enlargedBOX">
        <img src="" width="500" height="500" border="0" />
    </div>
</div>

这是一个 jsFiddle

您会看到红色的背景在白色的#enlargedBOX格上显示出来.

You'll see that the RED background shows through on the white #enlargedBOX div.

推荐答案

只需使用rgba()- 演示

Just use rgba() - DEMO

#blackout {
    position:absolute;
    top:0px;
    left:0px;
    height:100%;
    width:100%;
    overflow:auto;
    z-index:100;
    background: rgba(0, 0, 0, .9);
}

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