apply_filters( 'wp_resource_hints', array $urls, string $relation_type )

Parameters

$urls

(array) Array of resources and their attributes, or URLs to print for resource hints.

• '...$0'
  (array|string) Array of resource attributes, or a URL string.
  • 'href'
    (string) URL to include in resource hints. Required.
  • 'as'
    (string) How the browser should treat the resource (script, style, image, document, etc).
  • 'crossorigin'
    (string) Indicates the CORS policy of the specified resource.
  • 'pr'
    (float) Expected probability that the resource hint will be used.
  • 'type'
    (string) Type of the resource (text/html, text/css, etc).

$relation_type

(string) The relation type the URLs are printed for, e.g. 'preconnect' or 'prerender'.