我必须用JS(jQuery)检测浏览器是否支持Woff,然后向主体添加一个类.
像这样的东西：
if(woffIsSupported){
$('body').addClass('modern');
}
这有点可能吗？谢谢您的回答.
最佳答案
在this post上有一个名为isFontFaceSupported的函数,它根据浏览器功能检查支持(好方法,即不依赖于用户代理字符串).
if(isFontFaceSupported()) {
$('body').addClass('modern');
}
这是帖子的功能：
/*!
* isFontFaceSupported - v0.9 - 12/19/2009
* http://paulirish.com/2009/font-face-feature-detection/
*
* Copyright (c) 2009 Paul Irish
* MIT license
*/
var isFontFaceSupported = (function(){
var fontret,fontfaceCheckDelay = 100;
// IE supports EOT and has had EOT support since IE 5.
// This is a proprietary standard (ATOW) and thus this off-spec,// proprietary test for it is acceptable.
if (!(!/*@cc_on@if(@_jscript_version>=5)!@end@*/0)) fontret = true;
else {
// Create variables for dedicated @font-face test
var doc = document,docElement = doc.documentElement,st = doc.createElement('style'),spn = doc.createElement('span'),wid,nwid,body = doc.body,callback,isCallbackCalled;
// The following is a font,only containing the - character. Thanks Ethan Dunham.
st.textContent = "@font-face{font-family:testfont;src:url(data:font/opentype;base64,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)}";
doc.getElementsByTagName('head')[0].appendChild(st);
spn.setAttribute('style','font:99px _,serif;position:absolute;visibility:hidden');
if (!body){
body = docElement.appendChild(doc.createElement('fontface'));
}
// the data-uri'd font only has the - character
spn.innerHTML = '-------';
spn.id = 'fonttest';
body.appendChild(spn);
wid = spn.offsetWidth;
spn.style.font = '99px testfont,_,serif';
// needed for the CSSFontFaceRule false positives (ff3,chrome,op9)
fontret = wid !== spn.offsetWidth;
var delayedCheck = function(){
if (isCallbackCalled) return;
fontret = wid !== spn.offsetWidth;
callback && (isCallbackCalled = true) && callback(fontret);
}
addEventListener('load',delayedCheck,false);
setTimeout(delayedCheck,fontfaceCheckDelay);
}
function ret(){ return fontret || wid !== spn.offsetWidth; };
// allow for a callback
ret.ready = function(fn){
(isCallbackCalled || fontret) ? fn(fontret) : (callback = fn);
}
return ret;
})();
