背景颜色和背景图像CSS3之间的过渡 [英] transition between background color and background image CSS3

问题描述

我有一组div，我希望每个div具有不同的背景颜色，并且在悬停时过渡到所选url的背景图像.到目前为止，我已经设法找到用于平滑颜色的代码->图像过渡，但是这需要HTML中的实际img代码，并且我需要这些div，因为我将在其中添加文本.

I've got a set of divs and I want each of them to have different background color and while on hover to transition into a background image of chosen url. I have so far managed to find code for smooth color -> image transition but that requires an actual img code in HTML and I need those divs as I will be putting text in them.

是否有可能通过CSS从背景颜色平滑转换到背景url的时间不超过0.5秒?

Is there any chance to have a smooth 0.5s or less transition from background color to background url performed through CSS?

如果您查看 http://loopedmag.com ，您会看到我想在代码中重新创建的内容，但是过渡的动画颜色->图片.

If you look at http://loopedmag.com you can see what I want to recreate in code but with the transitioned animation color->image.

推荐答案

您无法为 background 属性设置纯色，并使用CSS3过渡为图像设置动画.

You can't animate the background property from solid color to image with CSS3 transitions.

要获得所需的行为，您将需要使用纯背景颜色淡入/淡出图层.您可以使用伪元素来最小化该层的标记.

To achieve the desired behaviour, you will need to fade in/out a layer with your solid background color. You may use a pseudo element to minimize markup for that layer.

演示

DEMO

HTML:

<div class="one"></div>
<div class="two"></div>

CSS:

body,html{
    height:100%;
}

div{
    height:50%;
    width:50%;
    position:relative;
    background-size:cover;
}
.one{
    background: url(http://lorempixel.com/output/fashion-q-c-640-480-3.jpg);
}
.two{
    background: url(http://lorempixel.com/output/people-q-g-640-480-7.jpg);
}
div:after{
    content:'';
    position:absolute;
    left:0; top:0;
    width:100%;
    height:100%;
    background:gold;
    opacity:1;

    -webkit-transition: opacity .5s;
    transition: opacity .5s;
}
div:hover:after{
    opacity:0;
}

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