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ClientHeight blocks using @ font-face overflow declarations: hidden

I highlighted some strange behavior that seems to happen when you have a block that has an overflow style: hidden, and uses a font declared using @ font-face (I use Google Web Fonts). clientHeight does not match the actual height of the element - it seems a bit shorter. I reproduced in Chrome and Firefox. Does anyone know what is going on here?

(Unfortunately, it will not play in JSFiddle, but here is the code - if you look at it in your browser unmodified, you will see about 80% of the paragraph.) ( Https://gist.github.com/2702563 )

<!DOCTYPE html>
<html>
    <head>
        <link href='http://fonts.googleapis.com/css?family=Tenor+Sans|Esteban' rel='stylesheet' type='text/css'>
        <style>
            #demo{
                width: 30em;
                            /* comment either of the lines below out and it'll work */
                overflow: hidden;
                font-family: 'Esteban';
            }
        </style>
    </head>
    <body>
        <div id="demo">
            <p>I give Pirrip as my father family name, on the authority of his
            tombstone and my sister,&mdash;Mrs. Joe Gargery, who married the blacksmith.
            As I never saw my father or my mother, and never saw any likeness
            of either of them (for their days were long before the days of
            photographs), my first fancies regarding what they were like were
            unreasonably derived from their tombstones. The shape of the letters on
            my father's, gave me an odd idea that he was a square, stout, dark man,
            with curly black hair. From the character and turn of the inscription,
            &ldquo;Also Georgiana Wife of the Above,&rdquo; I drew a childish conclusion that
            my mother was freckled and sickly. To five little stone lozenges, each
            about a foot and a half long, which were arranged in a neat row beside
            their grave, and were sacred to the memory of five little brothers of
            mine,&mdash;who gave up trying to get a living, exceedingly early in
            that universal struggle,&mdash;I am indebted for a belief I religiously
            entertained that they had all been born on their backs with their hands
            in their trousers-pockets, and had never taken them out in this state of
            existence.</p>
        </div>
        <script>
            document.getElementById('demo').style.height = document.getElementById('demo').clientHeight + 'px';
        </script>
    </body>
</html>
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2 answers

, script , . webfont, , : . script , , .

, script window.onload-, clientHeight webfont:

<!DOCTYPE html>
<html>
   <head>
      <link href='http://fonts.googleapis.com/css?family=Tenor+Sans|Esteban' rel='stylesheet' type='text/css'>
      <style>
         #demo{
            width: 30em;
            overflow: hidden;
            font-family: 'Esteban';
         }
      </style>
   </head>
   <body>
      <div id="demo">
         <p>I give Pirrip as my father family name, on the authority of his
           tombstone and my sister,&mdash;Mrs. Joe Gargery, who married the blacksmith.
           As I never saw my father or my mother, and never saw any likeness
           of either of them (for their days were long before the days of
           photographs), my first fancies regarding what they were like were
           unreasonably derived from their tombstones. The shape of the letters on
           my father's, gave me an odd idea that he was a square, stout, dark man,
           with curly black hair. From the character and turn of the inscription,
           &ldquo;Also Georgiana Wife of the Above,&rdquo; I drew a childish
           conclusion that my mother was freckled and sickly. To five little stone
           lozenges, each about a foot and a half long, which were arranged in a neat
           row beside their grave, and were sacred to the memory of five little
           brothers of mine,&mdash;who gave up trying to get a living, exceedingly
           early in that universal struggle,&mdash;I am indebted for a belief I
           religiously entertained that they had all been born on their backs with
           their hands in their trousers-pockets, and had n ever taken them out in
           this state of existence.</p>
        </div>
        <script>
         window.onload = function(){document.getElementById('demo').style.height = document.getElementById('demo').clientHeight + 'px';}
        </script>
     </body>
</html>
+1

, Chrome-.

, webfont , div , webfont, ...

<!DOCTYPE html>
<html>
    <head>
        <link href='http://fonts.googleapis.com/css?family=Tenor+Sans|Esteban' rel='stylesheet' type='text/css'>
        <style>
            #demo{
                width: 30em;
                /* comment either of the lines below out and it'll work */
                overflow: hidden;
                font-family: 'Esteban';
                background:#ddd;
            }
        </style>
    </head>
    <body>
        <div id="demo">
            Placeholder...
        </div>
        <script>
            window.onload = function() {
                document.getElementById('demo').innerHTML = "<p>I give Pirrip as my father family name, on the authority of his tombstone and my sister,&mdash;Mrs. Joe Gargery, who married the blacksmith. As I never saw my father or my mother, and never saw any likeness of either of them (for their days were long before the days of photographs), my first fancies regarding what they were like were unreasonably derived from their tombstones. The shape of the letters on my father's, gave me an odd idea that he was a square, stout, dark man, with curly black hair. From the character and turn of the inscription, &ldquo;Also Georgiana Wife of the Above,&rdquo; I drew a childish conclusion that my mother was freckled and sickly. To five little stone lozenges, each about a foot and a half long, which were arranged in a neat row beside their grave, and were sacred to the memory of five little brothers of mine,&mdash;who gave up trying to get a living, exceedingly early in that universal struggle,&mdash;I am indebted for a belief I religiously entertained that they had all been born on their backs with their hands in their trousers-pockets, and had never taken them out in this state of existence.</p>"

                // wrong size only with Chrome
                //document.getElementById('demo').style.height = document.getElementById('demo').clientHeight + 'px'; 

                // the more you wait, the more chances you have to get the right size
                setTimeout(function() {
                    document.getElementById('demo').style.height = document.getElementById('demo').clientHeight + 'px'; 
                }, 10); 
            }
        </script>
    </body>
</html>
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