How to Use Local Fonts in @font-face Declarations to Optimize Web Performance?

Patricia Arquette
Release: 2024-10-30 17:58:03
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How to Use Local Fonts in @font-face Declarations to Optimize Web Performance?

@font-face: Utilizing Local Fonts Without Browser Downloads

In a bid to optimize web performance, browsers often download fonts specified via @font-face declarations. This can be redundant if the user's system already possesses the font. To avoid this, consider utilizing the "local" keyword in your @font-face declaration.

Applying the "local" Keyword

The "local" keyword allows you to refer to the font by its system-installed name. To take advantage of this, simply specify the following:

<code class="css">@font-face {
  font-family: 'DejaVu Serif';
  src: local('DejaVu Serif'), ...;
}</code>
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By placing "local" first in the src list, browsers will attempt to utilize the locally installed version of DejaVu Serif before downloading it.

Further Optimizations

For more comprehensive font optimization, consider the following steps:

  • Specify multiple font formats: This improves compatibility across various browsers.
  • Use a font hosting service: Services like Font Squirrel provide optimized web fonts and manage caching for enhanced performance.
  • Leverage the CSSFontLoading API: This API allows you to check if a font is loaded and ready for use, reducing unnecessary font loading.

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