Added all non-obsolete, non-experimental attribs from MDN

internal/codegen/codegen.go

@@ -19,6 +19,14 @@ package %s
 import "gitlab.codemonkeysoftware.net/b/hatmill"
 `
 
+func identifier(s string) string {
+	words := strings.Split(s, "-")
+	for i, word := range words {
+		words[i] = strings.Title(word)
+	}
+	return strings.Join(words, "")
+}
+
 func fileHeader(packageName string) string {
     return fmt.Sprintf(headerFmt, packageName)
 }
@@ -88,7 +96,7 @@ func (def AttribDef) Generate() string {
         panic(fmt.Errorf("unknown attribute type: %v", def.Type))
     }
 
-    return fmt.Sprintf(template, strings.Title(def.Name), def.Name)
+    return fmt.Sprintf(template, identifier(def.Name), def.Name)
 }
 
 type ElemDef struct {
@@ -125,7 +133,7 @@ func (def ElemDef) Generate() string {
     if def.Void {
         template = voidTemplate
     }
-    return fmt.Sprintf(template, strings.Title(def.Name), def.Name)
+    return fmt.Sprintf(template, identifier(def.Name), def.Name)
 }
 
 type Defs struct {