Remove the importance attribute from the link element spec.

packages/@markuplint/html-spec/index.json

@@ -5060,16 +5060,6 @@
 						"self": "[imagesizes]"
 					}
 				},
-				{
-					"name": "importance",
-					"description": "Indicates the relative importance of the resource. Priority hints are delegated using the values: auto: Indicates no preference. The browser may use its own heuristics to decide the priority of the resource. high: Indicates to the browser that the resource is of high priority. low: Indicates to the browser that the resource is of low priority. Note: The importance attribute may only be used for the <link> element if rel=\"preload\" or rel=\"prefetch\" is present. Contains inline metadata — a base64-encoded cryptographic hash of the resource (file) you’re telling the browser to fetch. The browser can use this to verify that the fetched resource has been delivered free of unexpected manipulation. See Subresource Integrity.This attribute specifies the media that the linked resource applies to. Its value must be a media type / media query. This attribute is mainly useful when linking to external stylesheets — it allows the user agent to pick the best adapted one for the device it runs on. Notes: In HTML 4, this can only be a simple white-space-separated list of media description literals, i.e., media types and groups, where defined and allowed as values for this attribute, such as print, screen, aural, braille. HTML5 extended this to any kind of media queries, which are a superset of the allowed values of HTML 4. Browsers not supporting CSS3 Media Queries won't necessarily recognize the adequate link; do not forget to set fallback links, the restricted set of media queries defined in HTML 4. Identifies a resource that might be required by the next navigation and that the user agent should retrieve it. This allows the user agent to respond faster when the resource is requested in the future.A string indicating which referrer to use when fetching the resource: no-referrer means that the Referer header will not be sent. no-referrer-when-downgrade means that no Referer header will be sent when navigating to an origin without TLS (HTTPS). This is a user agent’s default behavior, if no policy is otherwise specified. origin means that the referrer will be the origin of the page, which is roughly the scheme, the host, and the port. origin-when-cross-origin means that navigating to other origins will be limited to the scheme, the host, and the port, while navigating on the same origin will include the referrer's path. unsafe-url means that the referrer will include the origin and the path (but not the fragment, password, or username). This case is unsafe because it can leak origins and paths from TLS-protected resources to insecure origins. This attribute names a relationship of the linked document to the current document. The attribute must be a space-separated list of link type values.This attribute defines the sizes of the icons for visual media contained in the resource. It must be present only if the rel contains a value of icon or a non-standard type such as Apple's apple-touch-icon. It may have the following values: any, meaning that the icon can be scaled to any size as it is in a vector format, like image/svg+xml. a white-space separated list of sizes, each in the format <width in pixels>x<height in pixels> or <width in pixels>X<height in pixels>. Each of these sizes must be contained in the resource. Note: Most icon formats are only able to store one single icon; therefore most of the time the sizes attribute contains only one entry. MS's ICO format does, as well as Apple's ICNS. ICO is more ubiquitous, so you should use this format if cross-browser support is a concern (especially for old IE versions). The title attribute has special semantics on the <link> element. When used on a <link rel=\"stylesheet\"> it defines a preferred or an alternate stylesheet. Incorrectly using it may cause the stylesheet to be ignored.This attribute is used to define the type of the content linked to. The value of the attribute should be a MIME type such as text/html, text/css, and so on. The common use of this attribute is to define the type of stylesheet being referenced (such as text/css), but given that CSS is the only stylesheet language used on the web, not only is it possible to omit the type attribute, but is actually now recommended practice. It is also used on rel=\"preload\" link types, to make sure the browser only downloads file types that it supports.",
-					"experimental": true,
-					"type": "String",
-					"enum": ["auto", "high", "low"],
-					"condition": {
-						"self": ["[rel=preload]", "[rel=prefetch]"]
-					}
-				},
 				{
 					"name": "integrity",
 					"description": "Contains inline metadata — a base64-encoded cryptographic hash of the resource (file) you’re telling the browser to fetch. The browser can use this to verify that the fetched resource has been delivered free of unexpected manipulation. See Subresource Integrity.This attribute specifies the media that the linked resource applies to. Its value must be a media type / media query. This attribute is mainly useful when linking to external stylesheets — it allows the user agent to pick the best adapted one for the device it runs on. Notes: In HTML 4, this can only be a simple white-space-separated list of media description literals, i.e., media types and groups, where defined and allowed as values for this attribute, such as print, screen, aural, braille. HTML5 extended this to any kind of media queries, which are a superset of the allowed values of HTML 4. Browsers not supporting CSS3 Media Queries won't necessarily recognize the adequate link; do not forget to set fallback links, the restricted set of media queries defined in HTML 4. Identifies a resource that might be required by the next navigation and that the user agent should retrieve it. This allows the user agent to respond faster when the resource is requested in the future.A string indicating which referrer to use when fetching the resource: no-referrer means that the Referer header will not be sent. no-referrer-when-downgrade means that no Referer header will be sent when navigating to an origin without TLS (HTTPS). This is a user agent’s default behavior, if no policy is otherwise specified. origin means that the referrer will be the origin of the page, which is roughly the scheme, the host, and the port. origin-when-cross-origin means that navigating to other origins will be limited to the scheme, the host, and the port, while navigating on the same origin will include the referrer's path. unsafe-url means that the referrer will include the origin and the path (but not the fragment, password, or username). This case is unsafe because it can leak origins and paths from TLS-protected resources to insecure origins. This attribute names a relationship of the linked document to the current document. The attribute must be a space-separated list of link type values.This attribute defines the sizes of the icons for visual media contained in the resource. It must be present only if the rel contains a value of icon or a non-standard type such as Apple's apple-touch-icon. It may have the following values: any, meaning that the icon can be scaled to any size as it is in a vector format, like image/svg+xml. a white-space separated list of sizes, each in the format <width in pixels>x<height in pixels> or <width in pixels>X<height in pixels>. Each of these sizes must be contained in the resource. Note: Most icon formats are only able to store one single icon; therefore most of the time the sizes attribute contains only one entry. MS's ICO format does, as well as Apple's ICNS. ICO is more ubiquitous, so you should use this format if cross-browser support is a concern (especially for old IE versions). The title attribute has special semantics on the <link> element. When used on a <link rel=\"stylesheet\"> it defines a preferred or an alternate stylesheet. Incorrectly using it may cause the stylesheet to be ignored.This attribute is used to define the type of the content linked to. The value of the attribute should be a MIME type such as text/html, text/css, and so on. The common use of this attribute is to define the type of stylesheet being referenced (such as text/css), but given that CSS is the only stylesheet language used on the web, not only is it possible to omit the type attribute, but is actually now recommended practice. It is also used on rel=\"preload\" link types, to make sure the browser only downloads file types that it supports.",

packages/@markuplint/html-spec/src/attributes/link.json

@@ -65,14 +65,6 @@
 			"condition": {
 				"self": "[rel=mask-icon]"
 			}
-		},
-		{
-			"name": "importance",
-			"type": "String",
-			"enum": ["auto", "high", "low"],
-			"condition": {
-				"self": ["[rel=preload]", "[rel=prefetch]"]
-			}
 		}
 	]
 }