CSS/HTML5:在全屏视频标签上带有after伪元素的透明层?
我正在尝试这样做:CSS/HTML5:在全屏视频标签上带有after伪元素的透明层?,css,html,video,Css,Html,Video,我正在尝试这样做: <video id="test" loop autoplay> <source src="assets/videos/h264.mp4" type="video/mp4"> <source src="assets/videos/h264.ogv" type="video/ogv"> <source src="assets/videos/h264.webm" type="video/webm"> </
<video id="test" loop autoplay>
<source src="assets/videos/h264.mp4" type="video/mp4">
<source src="assets/videos/h264.ogv" type="video/ogv">
<source src="assets/videos/h264.webm" type="video/webm">
</video>
为什么这不起作用?看起来这对我来说
如果我用div替换视频标签,它将100%工作。我在这里误解了什么?您应该对视频块使用
位置:相对,对顶部伪层使用位置:绝对
试试这个:
#test {
background: red;
width: 100%;
height: 100%;
position: relative;
display: block;
top: 0;
left: 0;
}
#test:after {
content: " ";
background: #000;
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
z-index: 1;
}
你可以
#test {
background: red;
width: 100%;
height: 100%;
position: relative;
display: block;
top: 0;
left: 0;
}
#test:after {
content: " ";
background: #000;
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
z-index: 1;
}