diff --git a/helpers/pagetop-macros/src/lib.rs b/helpers/pagetop-macros/src/lib.rs
index d802672e..17b076e3 100644
--- a/helpers/pagetop-macros/src/lib.rs
+++ b/helpers/pagetop-macros/src/lib.rs
@@ -127,8 +127,8 @@ pub fn fn_builder(_: TokenStream, item: TokenStream) -> TokenStream {
 
     // Genera el método alter_...() con el código del método with_...().
     let fn_alter_doc = format!(
-        "Permite modificar la instancia actual en los mismos términos que el método \
-        <em>builder</em> `{}()` al que está asociado.",
+        "Modifica la instancia en los mismos términos que para el patrón <em>builder</em> hace el \
+        método asociado `{}()`.",
         fn_with_name_str,
     );
     let fn_alter = quote! {
@@ -171,37 +171,6 @@ pub fn derive_auto_default(input: TokenStream) -> TokenStream {
     }
 }
 
-#[proc_macro_derive(ComponentClasses)]
-pub fn derive_component_classes(input: TokenStream) -> TokenStream {
-    let input = parse_macro_input!(input as DeriveInput);
-    let name = &input.ident;
-
-    #[rustfmt::skip]
-    let fn_alter_doc = format!(r##"
-        <p id="method.with_classes">Use
-        <code class="code-header"><span class="fn" href="#method.with_classes">with_classes</span>(self, …) -> Self</code>
-        to apply the <a href="#method.new">builder pattern</a>.
-        </p>
-    "##);
-
-    let expanded = quote! {
-        impl ComponentClasses for #name {
-            #[inline]
-            #[doc = #fn_alter_doc]
-            fn alter_classes(&mut self, op: ClassesOp, classes: impl Into<String>) -> &mut Self {
-                self.classes.alter_value(op, classes);
-                self
-            }
-
-            fn classes(&self) -> &OptionClasses {
-                &self.classes
-            }
-        }
-    };
-
-    TokenStream::from(expanded)
-}
-
 /// Define una función `main` asíncrona como punto de entrada de `PageTop`.
 ///
 /// # Ejemplos
diff --git a/pagetop/src/core/component.rs b/pagetop/src/core/component.rs
index 5a02ee0e..cca8baf9 100644
--- a/pagetop/src/core/component.rs
+++ b/pagetop/src/core/component.rs
@@ -5,9 +5,6 @@ pub type FnContextualPath = fn(cx: &Context) -> &str;
 mod definition;
 pub use definition::{ComponentBase, ComponentTrait};
 
-mod classes;
-pub use classes::{ComponentClasses, ComponentClassesOp};
-
 mod children;
 pub use children::Children;
 pub use children::{ChildComponent, ChildOp};
diff --git a/pagetop/src/core/component/classes.rs b/pagetop/src/core/component/classes.rs
deleted file mode 100644
index ab094be7..00000000
--- a/pagetop/src/core/component/classes.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-use crate::core::component::ComponentBase;
-use crate::html::{ClassesOp, OptionClasses};
-
-pub trait ComponentClassesOp {
-    fn with_classes(self, op: ClassesOp, classes: impl Into<String>) -> Self;
-}
-
-pub trait ComponentClasses: ComponentBase + ComponentClassesOp {
-    fn alter_classes(&mut self, op: ClassesOp, classes: impl Into<String>) -> &mut Self;
-
-    fn classes(&self) -> &OptionClasses;
-}
-
-impl<C: ComponentBase + ComponentClasses> ComponentClassesOp for C {
-    fn with_classes(mut self, op: ClassesOp, classes: impl Into<String>) -> Self {
-        self.alter_classes(op, classes);
-        self
-    }
-}
diff --git a/pagetop/src/lib.rs b/pagetop/src/lib.rs
index 09378170..001d3961 100644
--- a/pagetop/src/lib.rs
+++ b/pagetop/src/lib.rs
@@ -85,7 +85,7 @@
 
 // RE-EXPORTED *************************************************************************************
 
-pub use pagetop_macros::{fn_builder, html, main, test, AutoDefault, ComponentClasses};
+pub use pagetop_macros::{fn_builder, html, main, test, AutoDefault};
 
 pub type StaticResources = std::collections::HashMap<&'static str, static_files::Resource>;
 
diff --git a/pagetop/src/prelude.rs b/pagetop/src/prelude.rs
index 8f4de49f..190acced 100644
--- a/pagetop/src/prelude.rs
+++ b/pagetop/src/prelude.rs
@@ -4,7 +4,7 @@
 
 pub use crate::{fn_builder, html, main, test};
 
-pub use crate::{AutoDefault, ComponentClasses, StaticResources, UniqueId, Weight};
+pub use crate::{AutoDefault, StaticResources, UniqueId, Weight};
 
 // MACROS.