ere we preload our CSS and JavaScript files so they will be available as soon as they are required for the rendering of the page later on. This example is trivial, as the browser probably discovers the elements in the same chunk of HTML as the preloads, but the benefits can be seen much more clearly the later resources are discovered and the larger they are. For example: Resources that are pointed to from inside CSS, like fonts or images. Resources that JavaScript can request, like imported scripts. preload has other advantages too. Using as to specify the type of content to be preloaded allows the browser to: Store in the cache for future requests, reusing the resource if appropriate.