What is the method for a mono social icon to function without requiring a specific class for each icon

Curious about the magic behind Mono Social Icons and how it effortlessly displays the correct icon.

Unlike other font icon sets that require adding a class name to load a utf-8 character in :after, Mono Social Icons keeps it simple. Just add the icon as text and voila, the right icon appears with minimal CSS.

@font-face {
    font-family: 'Mono Social Icons Font';
    src: url('MonoSocialIconsFont-1.10.eot');
    src: url('MonoSocialIconsFont-1.10.eot?#iefix') format('embedded-opentype'),
         url('MonoSocialIconsFont-1.10.woff') format('woff'),
         url('MonoSocialIconsFont-1.10.ttf') format('truetype'),
         url('MonoSocialIconsFont-1.10.svg#MonoSocialIconsFont') format('svg');
    src: url('MonoSocialIconsFont-1.10.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

.symbol {
    font-family: 'Mono Social Icons Font';
}

Now you can use the font like so:

<span class='symbol'>facebook</span>

The inner workings of Mono Social Icons remain a mystery to me.

If anyone knows the secret behind this seamless functionality, please do share!

Answer №1

Welcome to the world of OpenType fonts, where fonts are intricate creations that have evolved over decades and are far more complex than simply images representing letters. Instead of just using a single picture for each letter, these fonts utilize advanced substitution functionality.

Just like how high-quality fonts replace "f" + "i" with a ligature "fi", some fonts like go even further by doing full-word substitutions. The text engine follows instructions from the font on how to style specific strings of text, consulting a GSUB table for substitution rules (which can vary depending on script and language).

{w,h,a,t,e,v,e,r} => glyphid:1234

Instead of displaying the word "whatever" as is, when it encounters this sequence in the text, it replaces it with a single glyph located at position 1234 within the font. This glyph may appear as an icon to you, even though technically it's just outlines being rendered differently.

If you want a more thorough explanation, check out:

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