href | Address of the hyperlink | Valid non-empty URL potentially surrounded by spaces |
crossorigin | How the element handles crossorigin requests | "anonymous"; "use-credentials" |
rel | Relationship between the document containing the hyperlink and the destination resource | Unordered set of unique space-separated tokens* |
as | Potential destination for a preload request (for rel="preload" and rel="modulepreload") | Potential destination, for rel="preload"; script-like destination, for rel="modulepreload" |
media | Applicable media | Valid media query list |
hreflang | Language of the linked resource | Valid BCP 47 language tag |
type | Hint for the type of the referenced resource | Valid MIME type string |
sizes | Sizes of the icons (for rel="icon") | Unordered set of unique space-separated tokens, ASCII case-insensitive, consisting of sizes* |
imagesrcset | Images to use in different situations, e.g., high-resolution displays, small monitors, etc. (for rel="preload") | Comma-separated list of image candidate strings |
imagesizes | Image sizes for different page layouts (for rel="preload") | Valid source size list |
referrerpolicy | Referrer policy for fetches initiated by the element | Referrer policy |
integrity | Integrity metadata used in Subresource Integrity checks [SRI] | Text |
blocking | Whether the element is potentially render-blocking | Unordered set of unique space-separated tokens* |
color | Color to use when customizing a site's icon (for rel="mask-icon") | CSS <color> |
disabled | Whether the link is disabled | Boolean attribute |
fetchpriority | Sets the priority for fetches initiated by the element | "auto"; "high"; "low" |