我正在调用一个函数,使用window.onload,它将视频的style.height和style.width设置为窗口中可能的最大值(同时保留纵横比)。当在onload事件中调用此视频时,视频在左侧和右侧都有黑条,当浏览器调整大小时它们仍然存在,并且从那时起似乎是视频(或其容器?)的一部分。
当我将“resizevid”函数从onload中删除,并且仅在onresize中调用它时,黑条不存在。
有关如何解决此问题的任何想法? onload事件后会发生什么变化,这会改变视频宽度的解释方式?非常感谢你,如果你能开导我的话!
整页的网址: 在onload中使用resizevid: http://thebeach.name/video.html 仅在onresize中使用resizevid: http://thebeach.name/videores.html
代码摘录: 式:
<style>
html, body, div, video{border:0px;margin:0px;padding:0px;background-color:black;vertical-align:top;text-align:center;}
video{width:100%}
</style>
HTML:
<body onresize="resizevid();" align=center>
<video align=center id="myvideo" autoplay loop>
</video>
</body>
脚本:
window.onload = function() {
changevid();
resizevid();
}
function resizevid(){
//find out the viewport size
var viewportwidth;
var viewportheight;
if (typeof window.innerWidth != 'undefined'){
viewportwidth = window.innerWidth,
viewportheight = window.innerHeight
}
else if (typeof document.documentElement != 'undefined'
&& typeof document.documentElement.clientWidth !=
'undefined' && document.documentElement.clientWidth != 0)
{
viewportwidth = document.documentElement.clientWidth,
viewportheight = document.documentElement.clientHeight
}
// older versions of IE
else
{
viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
viewportheight = document.getElementsByTagName('body')[0].clientHeight
}
//get the aspect ratio of the video
var vidwidth = document.getElementById('myvideo').offsetWidth;
var vidheight = document.getElementById('myvideo').offsetHeight;
var aspratio = vidheight/vidwidth;
//set video to full height, find correct width
function vidTooTall(){
d=document.getElementById('myvideo');
var newheight = viewportheight+'px';
var newwidth = viewportheight/aspratio;
newwidth = newwidth+'px';
d.style.height = newheight;
d.style.width = newwidth;
}
//set video to full width, find correct height
function vidTooWide(){
d=document.getElementById('myvideo');
var newwidth = viewportwidth+'px';
var newheight = aspratio*viewportwidth;
newheight = newheight+'px';
d.style.height = newheight;
d.style.width = newwidth;
}
//if windowheight/windowwidth < vidheight/vidwidth
//video is too tall, else video is too wide
if(viewportwidth*aspratio>viewportheight){
vidTooTall();
}
else{
vidTooWide();
}
}