http://darrenbachan.com/playground/diamond-hand-car-wash/index.html对HTML5视频
后备图片我想回退图像设置为这部影片的旗帜。当网站遇到媒体查询(手机)时,我希望视频成为图像,但是当我刷新页面时,我注意到一个类,在视频加载之前我给出了深灰色背景。思考相同的图像可能会出现。我想相信一个背景图像将被设置,并且当查询被打时,我可以在视频上添加诸如display:none之类的东西。
不知道如果我这样做是正确的,但继承人小提琴https://jsfiddle.net/8ucrarm0/
以防万一,这是可怕的,这里的HTML/CSS:
HTML - >
<div class="banner-text">
<span class="logo-white"><img src="img/logo-white.svg" alt=""></span>
<h1>Feeling luxurious is only one car wash away.</h1>
<h4>Become a Diamond Club Member today.</h4>
<button class="btn btn-primary btn-lg">See Pricing</button>
</div>
</div><!-- end video-holder -->
</header>
</div><!--end banner-->
CSS:
#banner.container-fluid {
padding: 0;
position: relative;
}
#banner.overlay:after {
position: absolute;
content:" ";
top:0;
left:0;
width:100%;
height:100%;
display: block;
z-index:0;
background-color: rgba(0,0,0,0.8);
}
header {
position: relative;
overflow: hidden;
width:100vw;
height:100vh;
max-height:100vh;
text-align:center;
}
.banner-text {
position: relative;
top: 55%;
-webkit-transform: translateY(-50%);
-ms-transform: translateY(-50%);
-o-transform: translateY(-50%);
transform: translateY(-50%);
z-index: 1;
margin: 0 auto;
max-width: 550px;
/*left: 50%;*/
/*transform: translate(-50%, -50%);*/
}
.banner-text h1,
.banner-text h4 {
color: #fff;
}
.banner-text h1 {
padding-bottom: 20px;
}
.banner-text h4 {
padding-bottom: 40px;
}
.banner-text .logo-white {
width: 75px;
height: 65px;
display: block;
margin: 0 auto 20px auto;
}
.video-holder {
position:absolute;
height:100%;
width:200%;
left:-50%;
}
video {
position:absolute;
top: -99999px;
bottom: -99999px;
left: -99999px;
right: -99999px;
margin: auto;
min-height:100%;
min-width:50%;
}
怎么样['poster'属性(https://developer.mozilla.org/en/docs/Web/HTML/Element/video#attr-海报)的'