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How to detect which one of the defined font was used in a web page?

By : Jim
Date : March 29 2020, 07:55 AM
may help you . I've seen it done in a kind of iffy, but pretty reliable way. Basically, an element is set to use a specific font and a string is set to that element. If the font set for the element does not exist, it takes the font of the parent element. So, what they do is measure the width of the rendered string. If it matches what they expected for the desired font as opposed to the derived font, it's present. This won't work for monospaced fonts.
Here's where it came from: Javascript/CSS Font Detector (ajaxian.com; 12 Mar 2007)
code :

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How can I detect when a google web font is ready and displayed in the page?

By : Matthew Schwar
Date : March 29 2020, 07:55 AM
Does that help Not sure if this is what you need but you may give it a try. If you use WebFont Loader then may be you can track it.

How Can I Detect the Characters Defined in a Font?

By : Howard Roark
Date : March 29 2020, 07:55 AM
I hope this helps you . I believe the information you're looking for is in the CMAP table of the font. I'm not expert on fonts, but my understanding is that the CMAP table maps unicode points to glyph indices. So if there is no glyph mapped to a unicode point, then it can be assumed the font does not support that character.
Here's some sample C# code I found using the WPF media libraries:
code :
var fontFamilies = System.Windows.Media.Fonts.GetFontFamilies(@"C:\Windows\Fonts\Arial.ttf");

foreach (var family in fontFamilies)
    foreach (var typeface in family.GetTypefaces())
        var glyph = null as System.Windows.Media.GlyphTypeface;

        if (typeface.TryGetGlyphTypeface(out glyph))
            foreach (var kvp in glyph.CharacterToGlyphMap)
                Console.WriteLine(kvp.Key.ToString() + " : " + kvp.Value.ToString());

Changing my web-font in css caused a my old font-size values defined in "em" to be inaccurate. How to fix it?

By : Rocket_Izz
Date : March 29 2020, 07:55 AM
it should still fix some issue The font size is not changed at all when you change font family, but the dimensions of characters will change. If this is a problem, you need to reconsider your choices of font families and font sizes.
You’re not describing how you use fonts, so I’ll make a guess. Suppose your copy text font is Arial and you are using Bebas Neue for headings. In Bebas Neue, all letters are about as tall as uppercase letters in Arial. It’s an odd font that intentionally loses case distinctions, and this has its implications. (For example, if you used a huge relative font size like 2.8em, the sizes of letters will become even more huge, when in BebasNeue versus copy text Arial.) If you use it, you simply need to select font sizes accordingly. This should not be a big issue if you have set heading font sizes in a controlled manner.

Web font (using @font-face) visible in web page but not visible on user's system controls

By : dcoopr
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Yes it is because your font is accessible from the web page only and not available for the system. But you cannot directly install a font to the device. But it can be done using configuration profiles and I think this is a good example how you want it to work. you can ask the user to download and install the font
Here is a bit more readable info about configuration profiles

Chrome browser is not using 'Open Sans' font defined in my web page instead it is using default for a website

By : Saurav Thakur
Date : March 29 2020, 07:55 AM
I wish this helpful for you welcome on Stackoverflow.
If you look the href of the stylesheet you included the Muli font, ..?family=Muli in order to use the Open Sans you should include the it, replace it with ?family=Open+Sans
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