fix self-closing tags

Author: stackus

compiler/nodes.go

@@ -512,6 +512,14 @@ func (n *ElementNode) Source(tw *templateWriter) error {
 		return err
 	}
 	// close the tag
+	if n.isSelfClosing {
+		// add a "/" to the end of the tag as long as it's not in the list of tags that shouldn't get it
+		if !slices.Contains(selfClosedTags, strings.ToLower(n.tag)) {
+			if _, err := tw.WriteStringLiteral("/"); err != nil {
+				return err
+			}
+		}
+	}
 	if _, err := tw.WriteStringLiteral(">"); err != nil {
 		return err
 	}

examples/tags/selfclosing.goht

@@ -24,7 +24,7 @@ package tags
 @slim SlimSelfClosing() {
 	img{src: "logo.png", alt: "logo"}
 	p
-		A paragraph is not self closing.
+		|A paragraph is not self closing.
 		img{src: "logo.png", alt: "logo"}
 }
 

examples/tags/selfclosing.goht.go

@@ -1 +1 @@
-<isNowSelfClosing>
+<isNowSelfClosing/>

examples/testdata/haml/tags_alsoSelfClosing.html

@@ -1 +1 @@
-<isNowSelfClosing>
+<isNowSelfClosing/>

examples/testdata/slim/tags_alsoSelfClosing.html

@@ -1,3 +1,3 @@
 <img src="logo.png" alt="logo"><p>
-<A>paragraph is not self closing.</A>
+A paragraph is not self closing.
 <img src="logo.png" alt="logo"></p>