LibWeb: Implement HTMLLinkElement.fetchPriority

Author: https://github.com/jamierocks
Commit: https://github.com/LadybirdBrowser/ladybird/commit/735859bc10
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/24
Reviewed-by: https://github.com/tcl3 ✅

Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp

@@ -210,7 +210,8 @@ HTMLLinkElement::LinkProcessingOptions HTMLLinkElement::create_link_options()
     // document                         document
     options.document = &document;
     // FIXME: cryptographic nonce metadata     The current value of el's [[CryptographicNonce]] internal slot
-    // FIXME: fetch priority                   the state of el's fetchpriority content attribute
+    // fetch priority                   the state of el's fetchpriority content attribute
+    options.fetch_priority = Fetch::Infrastructure::request_priority_from_string(get_attribute_value(HTML::AttributeNames::fetchpriority)).value_or(Fetch::Infrastructure::Request::Priority::Auto);
 
     // 3. If el has an href attribute, then set options's href to the value of el's href attribute.
     if (auto maybe_href = get_attribute(AttributeNames::href); maybe_href.has_value())

Userland/Libraries/LibWeb/HTML/HTMLLinkElement.idl

@@ -1,5 +1,6 @@
 #import <CSS/LinkStyle.idl>
 #import <HTML/HTMLElement.idl>
+#import <HTML/Scripting/Fetching.idl>
 
 // https://html.spec.whatwg.org/multipage/semantics.html#htmllinkelement
 [Exposed=Window]
@@ -22,7 +23,7 @@ interface HTMLLinkElement : HTMLElement {
     [FIXME, CEReactions] attribute DOMString referrerPolicy;
     [FIXME, SameObject, PutForwards=value] readonly attribute DOMTokenList blocking;
     [CEReactions, Reflect] attribute boolean disabled;
-    [FIXME, CEReactions] attribute DOMString fetchPriority;
+    [CEReactions, Enumerated=FetchPriorityAttribute, Reflect=fetchpriority] attribute DOMString fetchPriority;
 
     // Obsolete
     [CEReactions, Reflect] attribute DOMString charset;