feat: support HTMX wildcard attribute names, fixes #271

.version

@@ -1 +1 @@
-0.2.458
+0.2.459

generator/test-element-attributes/expected.html

@@ -18,3 +18,13 @@
              end">
 </div>
 
+<h2>HTMX Wildcard attribute</h2>
+
+<form
+ 	hx-post="/api/secret/unlock"
+ 	hx-target="#secret"
+ 	hx-target-*="#errors"
+ 	hx-indicator="#loading-indicator"
+>
+  <input type="button" value="Unlock"/>
+</form>

generator/test-element-attributes/template.templ

@@ -34,4 +34,13 @@ templ render(p person) {
                 do something
              end"
 	></div>
+	<h2>HTMX Wildcard attribute</h2>
+	<form
+ 		hx-post="/api/secret/unlock"
+ 		hx-target="#secret"
+ 		hx-target-*="#errors"
+ 		hx-indicator="#loading-indicator"
+	>
+		<input type="button" value="Unlock"/>
+	</form>
 }

parser/v2/elementparser.go

@@ -81,7 +81,7 @@ var elementCloseTagParser = parse.Func(func(in *parse.Input) (ct elementCloseTag
 // Attribute name.
 var (
 	attributeNameFirst      = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ:_@"
-	attributeNameSubsequent = attributeNameFirst + "-.0123456789"
+	attributeNameSubsequent = attributeNameFirst + "-.0123456789*"
 	attributeNameParser     = parse.Func(func(in *parse.Input) (name string, ok bool, err error) {
 		start := in.Index()
 		var prefix, suffix string

parser/v2/elementparser_test.go

@@ -309,6 +309,15 @@ if test {
 				Value: `<">`,
 			},
 		},
+		{
+			name:   "HTMX wildcard attribute names are supported",
+			input:  ` hx-target-*="#errors"`,
+			parser: StripType(constantAttributeParser),
+			expected: ConstantAttribute{
+				Name:  "hx-target-*",
+				Value: `#errors`,
+			},
+		},
 	}
 	for _, tt := range tests {
 		tt := tt

parser/v2/types.go

@@ -694,7 +694,7 @@ type ExpressionAttribute struct {
 
 func (ea ExpressionAttribute) String() string {
 	sb := new(strings.Builder)
-	ea.Write(sb, 0)
+	_ = ea.Write(sb, 0)
 	return sb.String()
 }