var html/template.jsonMarshalType

2 uses

	html/template (current package)
		js.go#L121: var jsonMarshalType = reflect.TypeOf((*json.Marshaler)(nil)).Elem()
		js.go#L135: 	for !v.Type().Implements(jsonMarshalType) && v.Kind() == reflect.Pointer && !v.IsNil() {