https://w3c.github.io/preload/Example directives to preload a resource that will be consumed by...
consumer Preload directive
<audio> <link rel=preload as=audio href=...>
<video> <link rel=preload as=video href=...>
<track> <link rel=preload as=track href=...>
<script>, Worker's importScripts <link rel=preload as=script href=...>
<link rel=stylesheet>, CSS @import <link rel=preload as=style href=...>
CSS @font-face <link rel=preload as=font href=...>
<img>, <picture>, srcset, imageset <link rel=preload as=image href=...>
SVG's <image>, CSS *-image <link rel=preload as=image href=...>
XHR, fetch <link rel=preload as=fetch crossorigin href=...>
Worker, SharedWorker <link rel=preload as=worker href=...>
<embed> <link rel=preload as=embed href=...>
<object> <link rel=preload as=object href=...>
<iframe>, <frame> <link rel=preload as=document href=...>
