使用伪元素的 content 属性改变 img

Question

我正在尝试使用动画和替换图像制作闪烁效果。这是我的代码，请告诉我哪里出错了。

HTML代码

<img class="lantern red" src="images/lantern.png">

CSS代码

.lantern::before { 
    content: url("images/lantern_twinkless.png"); position: absolute; display: block; width: 100%; height: 100% 
}

Answer 1

因为你 can not apply pseudo 图片上的元素，解决方法是使用图形标签

Note. This specification does not fully define the interaction of :before and :after with replaced elements (such as IMG in HTML). This will be defined in more detail in a future specification.

figure{
    width: 200px;
    height: 200px;
    background: red;
    position: relative;
    margin: 0 auto
}

figure:before{
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    width: 100%;
    height: 100%;
    background: green
}

<figure>
</figure>

使用伪元素的 content 属性改变 img

Use pseudo element's content attribute to change img

css

image

pseudo-element