@@ -55,7 +55,8 @@ To do that, first install the WebLink component:
5555 $ composer require symfony/web-link
5656
5757preload() `` Twig function provided by
58- WebLink:
58+ WebLink. The `"as" attribute `_ is mandatory because browsers need it to apply
59+ correct prioritization and the content security policy:
5960
6061..code-block ::html+twig
6162
@@ -174,6 +175,7 @@ You can also add links to the HTTP response directly from controllers and servic
174175.. _`Resource Hints` :https://www.w3.org/TR/resource-hints/
175176.. _`Docker installer and runtime for Symfony` :https://github.com/dunglas/symfony-docker
176177.. _`preload` :https://developer.mozilla.org/en-US/docs/Web/HTML/Preloading_content
178+ .. _`"as" attribute` :https://w3c.github.io/preload/#as-attribute
177179.. _`the Priority Hints specification` :https://wicg.github.io/priority-hints/
178180.. _`the Preload specification` :https://www.w3.org/TR/preload/#server-push-(http/2)
179181.. _`Cloudflare` :https://blog.cloudflare.com/announcing-support-for-http-2-server-push-2/