当我调用youtube getAvailableQualityLevels()函数时,我得到一个空数组,但为什么？
该视频有许多质量等级,如360p 480p ... 720p
演示: http ://jsbin.com/eyexah/1/edit
YT API文档 https://developers.google.com/youtube/js_api_reference#GettingReference
码:
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.8.2.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js" type="text/javascript"></script>
<meta charset=utf-8 />
<title>JS Bin</title>
<script type="text/javascript" language="javascript">
var params = { allowScriptAccess: "always" };
var atts = { id: "youtube_player" };
swfobject.embedSWF('http://www.youtube.com/v/ZGx2WUbhnyM?enablejsapi=1&playerapiid=ytplayer&version=3',
'youtube',
'425',
'356',
'8',
null,
null,
params,
atts);
</script>
<script type="text/javascript" language="javascript">
function onYouTubePlayerReady()
{
console.log('# onYouTubePlayerReady');
var ytp = document.getElementById("youtube_player");
var getQuali = ytp.getAvailableQualityLevels();
console.log(getQuali);
};
</script>
</head>
<body>
<div id="youtube"></div>
</body> …我构建了一个WepApp,我想用Google的代码删除触摸设备上300ms的延迟
DOC
http://developers.google.com/mobile/articles/fast_buttons
我不确定,我认为我的HTC one X上的两个版本没有任何区别.
演示1(正常)
http://jsbin.com/awejal/4/edit
演示2(使用fastclick修复)
http://jsbin.com/awejal/5/edit
我(在演示2中)在控制台中得到了额外的错误,TypeError: element is null
但为什么呢？我不明白.
如何将这种计算方式更改为较暗而不是较亮的颜色？
function increase_brightness(hex, percent){
// strip the leading # if it's there
hex = hex.replace(/^\s*#|\s*$/g, '');
// convert 3 char codes --> 6, e.g. `E0F` --> `EE00FF`
if(hex.length == 3){
hex = hex.replace(/(.)/g, '$1$1');
}
var r = parseInt(hex.substr(0, 2), 16),
g = parseInt(hex.substr(2, 2), 16),
b = parseInt(hex.substr(4, 2), 16);
return '#' +
((0|(1<<8) + r + (256 - r) * percent / 100).toString(16)).substr(1) +
((0|(1<<8) + g + (256 - g) * percent / 100).toString(16)).substr(1) +
((0|(1<<8) + …