feat(parser): support colons in element names (#723)

Co-authored-by: Adrian Hesketh <adrianhesketh@hushmail.com>
Co-authored-by: Adrian Hesketh <a-h@users.noreply.github.com>

.version

@@ -1 +1 @@
-0.2.681
+0.2.682

parser/v2/elementparser.go

@@ -361,7 +361,7 @@ func (attributesParser) Parse(in *parse.Input) (attributes []Attribute, ok bool,
 // Element name.
 var (
 	elementNameFirst      = "abcdefghijklmnopqrstuvwxyz"
-	elementNameSubsequent = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-"
+	elementNameSubsequent = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-:"
 	elementNameParser     = parse.Func(func(in *parse.Input) (name string, ok bool, err error) {
 		start := in.Index()
 		var prefix, suffix string

parser/v2/elementparser_test.go

@@ -41,6 +41,31 @@ func TestAttributeParser(t *testing.T) {
 				},
 			},
 		},
+		{
+			name:   "element: colon in name",
+			input:  `<maps:map>`,
+			parser: StripType(elementOpenTagParser),
+			expected: elementOpenTag{
+				Name: "maps:map",
+				NameRange: Range{
+					From: Position{Index: 1, Line: 0, Col: 1},
+					To:   Position{Index: 9, Line: 0, Col: 9},
+				},
+			},
+		},
+		{
+			name:   "element: colon in name, closing",
+			input:  `<maps:map>Content</maps:map>`,
+			parser: StripType(element),
+			expected: Element{
+				Name: "maps:map",
+				NameRange: Range{
+					From: Position{Index: 1, Line: 0, Col: 1},
+					To:   Position{Index: 9, Line: 0, Col: 9},
+				},
+				Children: []Node{Text{Value: "Content"}},
+			},
+		},
 		{
 			name:   "element: open with hyperscript attribute",
 			input:  `<div _="show = true">`,