Протестировано в Safari, Chrome, Firefox, Opera, IE7, IE8, IE9:
function waitForWebfonts(fonts, callback) {
var loadedFonts = 0;
for(var i = 0, l = fonts.length; i < l; ++i) {
(function(font) {
var node = document.createElement('span');
// Characters that vary significantly among different fonts
node.innerHTML = 'giItT1WQy@!-/#';
// Visible - so we can measure it - but not on the screen
node.style.position = 'absolute';
node.style.left = '-10000px';
node.style.top = '-10000px';
// Large font size makes even subtle changes obvious
node.style.fontSize = '300px';
// Reset any font properties
node.style.fontFamily = 'sans-serif';
node.style.fontVariant = 'normal';
node.style.fontStyle = 'normal';
node.style.fontWeight = 'normal';
node.style.letterSpacing = '0';
document.body.appendChild(node);
// Remember width with no applied web font
var width = node.offsetWidth;
node.style.fontFamily = font;
var interval;
function checkFont() {
// Compare current width with original width
if(node && node.offsetWidth != width) {
++loadedFonts;
node.parentNode.removeChild(node);
node = null;
}
// If all fonts have been loaded
if(loadedFonts >= fonts.length) {
if(interval) {
clearInterval(interval);
}
if(loadedFonts == fonts.length) {
callback();
return true;
}
}
};
if(!checkFont()) {
interval = setInterval(checkFont, 50);
}
})(fonts[i]);
}
};
Используйте его как:
waitForWebfonts(['MyFont1', 'MyFont2'], function() {
// Will be called as soon as ALL specified fonts are available
});