Using jQuery to know when @font-face fonts are loaded?

Question

I am using @font-face and I hate that Firefox shows the default font, waits to load the @font-face font, then replaces it. So the whole page flashes with the new font.

Answer 1

I got the same problem. And somehow i can't get Google webfont loader to work with ttf font (especially chinese fonts) or send a jquery response when font is loaded.

So I came up with this a more basic solution, useful when changing font dynamically after page is loaded. it shows when the font face is properly loaded.

First i create a dummy div and then fill it with 'abcd' and then give it a font size 40, record the width of the div. When the 'change font' event is invoked via a button or anything, it should track the dummy div width changes. Width changes would represent that the font has change.

HTML CODE

abdc

JQuery

//create a variable to track initial width of default font
var trackwidth

//when change font is invoke
function changefont(newfont)
{
   //reset dummy font style
    $('#dummy').css('font-family','initial !important;');
    $('#dummy').css({'font-size':'40px'});
    $('#dummy').html('abcd');

    //ensure that trackwidth is only recorded once of the default font
    if(trackwidth==null)
    {
       trackwidth=( $('#dummy').width());
    }

    //apply new font
    $('#dummy').css('font-family',newfont);
    checkwidth()
}

function checkwidth()
{
   //check if div width changed
   if($('#dummy').width() == trackwidth)
    {
        //if div never change, detect again every 500 milisecs
        setTimeout(checkwidth, 500);
    }
    else
    {
      //do something, font is loaded!
    }
}