shithub: hugo

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publisher: Collect transition attributes as classes

Fixes #7509

--- a/publisher/htmlElementsCollector.go

+++ b/publisher/htmlElementsCollector.go

@@ -220,6 +220,7 @@

 var (

 	htmlJsonFixer = strings.NewReplacer(", ", "\n")

 	jsonAttrRe    = regexp.MustCompile(`'?(.*?)'?:.*`)

+	classAttrRe   = regexp.MustCompile(`(?i)^class$|transition`)

 )

 func parseHTMLElement(elStr string) (el htmlElement) {

@@ -242,7 +243,7 @@

 					// There should be only one, but one never knows...

 					el.IDs = append(el.IDs, a.Val)

 				default:

-					if strings.EqualFold(a.Key, "class") {

+					if classAttrRe.MatchString(a.Key) {

 						el.Classes = append(el.Classes, strings.Fields(a.Val)...)

 					} else {

 						key := strings.ToLower(a.Key)

--- a/publisher/htmlElementsCollector_test.go

+++ b/publisher/htmlElementsCollector_test.go

@@ -85,6 +85,7 @@

                 }" class="block w-36 cursor-pointer pr-3 no-underline capitalize"></a>`, f("a", "block capitalize cursor-pointer no-underline pl-2 pl-3 pr-3 text-a text-b text-gray-600 w-36", "")},

+		{"Alpine transition 1", `<div x-transition:enter-start="opacity-0 transform mobile:-translate-x-8 sm:-translate-y-8">`, f("div", "mobile:-translate-x-8 opacity-0 sm:-translate-y-8 transform", "")},

 		{"Vue bind", `<div v-bind:class="{ active: isActive }"></div>`, f("div", "active", "")},

 	} {

 		c.Run(test.name, func(c *qt.C) {