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Tip: Use the Preload Resource Hint for Super-fast CSS

See how to increase performance for your web site.


The preload resource hint can give the browser a head start on loading your site's CSS and it also signals the browser to initiate an early fetch for an asset.

You can set it as an HTTP header in your server configuration: Link:

; rel=preload; as=style

Or as a tag in HTML like this: Link:

</css/styles.css>; rel=preload; as=style

Or as a <link> tag in HTML like this:

<link rel="preload" href="/css/styles.css" as="style">

First option is recommended, because this means that that it will initiate a server push event on most HTTP/2 implementations and that the browser will discover the hint earlier in the response headers, instead of later on in the response body.

Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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