diff --git a/packages/pagetop-bootsier/src/lib.rs b/packages/pagetop-bootsier/src/lib.rs
index daf928e6..3297d692 100644
--- a/packages/pagetop-bootsier/src/lib.rs
+++ b/packages/pagetop-bootsier/src/lib.rs
@@ -52,67 +52,53 @@ impl ThemeTrait for Bootsier {
 
     #[rustfmt::skip]
     fn before_prepare_component(&self, component: &mut dyn ComponentTrait, _cx: &mut Context) {
-        match component.type_id() {
-            t if t == TypeId::of::<Icon>() => {
-                if let Some(i) = component_as_mut::<Icon>(component) {
-                    i.alter_classes(
-                        ClassesOp::Replace(i.font_size().to_string()),
-                        with_font(i.font_size()),
-                    );
-                }
-            }
-            t if t == TypeId::of::<Button>() => {
-                if let Some(b) = component_as_mut::<Button>(component) {
-                    b.alter_classes(ClassesOp::Replace("button__tap".to_owned()), "btn");
-                    b.alter_classes(
-                        ClassesOp::Replace(b.style().to_string()),
-                        match b.style() {
-                            StyleBase::Default => "btn-primary",
-                            StyleBase::Info    => "btn-info",
-                            StyleBase::Success => "btn-success",
-                            StyleBase::Warning => "btn-warning",
-                            StyleBase::Danger  => "btn-danger",
-                            StyleBase::Light   => "btn-light",
-                            StyleBase::Dark    => "btn-dark",
-                            StyleBase::Link    => "btn-link",
-                        },
-                    );
-                    b.alter_classes(
-                        ClassesOp::Replace(b.font_size().to_string()),
-                        with_font(b.font_size()),
-                    );
-                }
-            }
-            t if t == TypeId::of::<Heading>() => {
-                if let Some(h) = component_as_mut::<Heading>(component) {
-                    h.alter_classes(
-                        ClassesOp::Replace(h.size().to_string()),
-                        match h.size() {
-                            HeadingSize::ExtraLarge => "display-1",
-                            HeadingSize::XxLarge    => "display-2",
-                            HeadingSize::XLarge     => "display-3",
-                            HeadingSize::Large      => "display-4",
-                            HeadingSize::Medium     => "display-5",
-                            _ => "",
-                        },
-                    );
-                }
-            }
-            t if t == TypeId::of::<Paragraph>() => {
-                if let Some(p) = component_as_mut::<Paragraph>(component) {
-                    p.alter_classes(
-                        ClassesOp::Replace(p.font_size().to_string()),
-                        with_font(p.font_size()),
-                    );
-                }
-            }
-            _ => {}
+        if let Some(i) = component.downcast_mut::<Icon>() {
+            i.alter_classes(
+                ClassesOp::Replace(i.font_size().to_string()),
+                with_font(i.font_size()),
+            );
+        } else if let Some(b) = component.downcast_mut::<Button>() {
+            b.alter_classes(ClassesOp::Replace("button__tap".to_owned()), "btn");
+            b.alter_classes(
+                ClassesOp::Replace(b.style().to_string()),
+                match b.style() {
+                    StyleBase::Default => "btn-primary",
+                    StyleBase::Info    => "btn-info",
+                    StyleBase::Success => "btn-success",
+                    StyleBase::Warning => "btn-warning",
+                    StyleBase::Danger  => "btn-danger",
+                    StyleBase::Light   => "btn-light",
+                    StyleBase::Dark    => "btn-dark",
+                    StyleBase::Link    => "btn-link",
+                },
+            );
+            b.alter_classes(
+                ClassesOp::Replace(b.font_size().to_string()),
+                with_font(b.font_size()),
+            );
+        } else if let Some(h) = component.downcast_mut::<Heading>() {
+            h.alter_classes(
+                ClassesOp::Replace(h.size().to_string()),
+                match h.size() {
+                    HeadingSize::ExtraLarge => "display-1",
+                    HeadingSize::XxLarge    => "display-2",
+                    HeadingSize::XLarge     => "display-3",
+                    HeadingSize::Large      => "display-4",
+                    HeadingSize::Medium     => "display-5",
+                    _ => "",
+                },
+            );
+        } else if let Some(p) = component.downcast_mut::<Paragraph>() {
+            p.alter_classes(
+                ClassesOp::Replace(p.font_size().to_string()),
+                with_font(p.font_size()),
+            );
         }
     }
 
     fn render_component(&self, component: &dyn ComponentTrait, cx: &mut Context) -> Option<Markup> {
-        match component.type_id() {
-            t if t == TypeId::of::<Layout>() => Some(
+        if component.downcast_ref::<Layout>().is_some() {
+            Some(
                 match cx.layout() {
                     "admin" => Container::new().add_item(
                         Flex::new()
@@ -134,8 +120,9 @@ impl ThemeTrait for Bootsier {
                     ),
                 }
                 .render(cx),
-            ),
-            t if t == TypeId::of::<Error404>() => Some(html! {
+            )
+        } else if component.downcast_ref::<Error404>().is_some() {
+            Some(html! {
                 div class="jumbotron" {
                     div class="media" {
                         img
@@ -165,8 +152,9 @@ impl ThemeTrait for Bootsier {
                         }
                     }
                 }
-            }),
-            _ => None,
+            })
+        } else {
+            None
         }
     }
 }
diff --git a/packages/pagetop-bulmix/src/lib.rs b/packages/pagetop-bulmix/src/lib.rs
index a2cb3906..890b5631 100644
--- a/packages/pagetop-bulmix/src/lib.rs
+++ b/packages/pagetop-bulmix/src/lib.rs
@@ -41,57 +41,43 @@ impl ThemeTrait for Bulmix {
 
     #[rustfmt::skip]
     fn before_prepare_component(&self, component: &mut dyn ComponentTrait, _cx: &mut Context) {
-        match component.type_id() {
-            t if t == TypeId::of::<Icon>() => {
-                if let Some(i) = component_as_mut::<Icon>(component) {
-                    i.alter_classes(
-                        ClassesOp::Replace(i.font_size().to_string()),
-                        with_font(i.font_size()),
-                    );
+        if let Some(i) = component.downcast_mut::<Icon>() {
+            i.alter_classes(
+                ClassesOp::Replace(i.font_size().to_string()),
+                with_font(i.font_size()),
+            );
+        } else if let Some(b) = component.downcast_mut::<Button>() {
+            b.alter_classes(ClassesOp::Replace("button__tap".to_owned()), "button");
+            b.alter_classes(
+                ClassesOp::Replace(b.style().to_string()),
+                match b.style() {
+                    StyleBase::Default => "is-primary",
+                    StyleBase::Info    => "is-info",
+                    StyleBase::Success => "is-success",
+                    StyleBase::Warning => "is-warning",
+                    StyleBase::Danger  => "is-danger",
+                    StyleBase::Light   => "is-light",
+                    StyleBase::Dark    => "is-dark",
+                    StyleBase::Link    => "is-text",
+                },
+            );
+            b.alter_classes(
+                ClassesOp::Replace(b.font_size().to_string()),
+                with_font(b.font_size()),
+            );
+        } else if let Some(h) = component.downcast_mut::<Heading>() {
+            match h.size() {
+                HeadingSize::Subtitle => {
+                    h.alter_classes(ClassesOp::Replace(h.size().to_string()), "subtitle")
                 }
-            }
-            t if t == TypeId::of::<Button>() => {
-                if let Some(b) = component_as_mut::<Button>(component) {
-                    b.alter_classes(ClassesOp::Replace("button__tap".to_owned()), "button");
-                    b.alter_classes(
-                        ClassesOp::Replace(b.style().to_string()),
-                        match b.style() {
-                            StyleBase::Default => "is-primary",
-                            StyleBase::Info    => "is-info",
-                            StyleBase::Success => "is-success",
-                            StyleBase::Warning => "is-warning",
-                            StyleBase::Danger  => "is-danger",
-                            StyleBase::Light   => "is-light",
-                            StyleBase::Dark    => "is-dark",
-                            StyleBase::Link    => "is-text",
-                        },
-                    );
-                    b.alter_classes(
-                        ClassesOp::Replace(b.font_size().to_string()),
-                        with_font(b.font_size()),
-                    );
-                }
-            }
-            t if t == TypeId::of::<Heading>() => {
-                if let Some(h) = component_as_mut::<Heading>(component) {
-                    match h.size() {
-                        HeadingSize::Subtitle => {
-                            h.alter_classes(ClassesOp::Replace(h.size().to_string()), "subtitle")
-                        }
-                        _ => h.alter_classes(ClassesOp::Add, "title"),
-                    };
-                }
-            }
-            t if t == TypeId::of::<Paragraph>() => {
-                if let Some(p) = component_as_mut::<Paragraph>(component) {
-                    p.alter_classes(ClassesOp::Add, "block");
-                    p.alter_classes(
-                        ClassesOp::Replace(p.font_size().to_string()),
-                        with_font(p.font_size()),
-                    );
-                }
-            }
-            _ => {}
+                _ => h.alter_classes(ClassesOp::Add, "title"),
+            };
+        } else if let Some(p) = component.downcast_mut::<Paragraph>() {
+            p.alter_classes(ClassesOp::Add, "block");
+            p.alter_classes(
+                ClassesOp::Replace(p.font_size().to_string()),
+                with_font(p.font_size()),
+            );
         }
     }
 
@@ -100,17 +86,13 @@ impl ThemeTrait for Bulmix {
         component: &dyn ComponentTrait,
         _cx: &mut Context,
     ) -> Option<Markup> {
-        match component.type_id() {
-            t if t == TypeId::of::<Icon>() => {
-                if let Some(i) = component_as_ref::<Icon>(component) {
-                    return match i.icon_name().get() {
-                        None => None,
-                        _ => Some(html! { span class="icon" { i class=[i.classes().get()] {} } }),
-                    };
-                }
-                None
-            }
-            _ => None,
+        if let Some(i) = component.downcast_ref::<Icon>() {
+            return match i.icon_name().get() {
+                None => None,
+                _ => Some(html! { span class="icon" { i class=[i.classes().get()] {} } }),
+            };
+        } else {
+            None
         }
     }
 }
diff --git a/src/base/action/component/after_prepare_component.rs b/src/base/action/component/after_prepare_component.rs
index a2a280db..f46d1e33 100644
--- a/src/base/action/component/after_prepare_component.rs
+++ b/src/base/action/component/after_prepare_component.rs
@@ -47,7 +47,7 @@ impl<C: ComponentTrait> AfterPrepareComponent<C> {
     pub(crate) fn dispatch(component: &mut C, cx: &mut Context, referer_id: Option<String>) {
         dispatch_actions(
             (TypeId::of::<Self>(), Some(TypeId::of::<C>()), referer_id),
-            |action| (action_ref::<AfterPrepareComponent<C>>(&**action).f)(component, cx),
+            |action: &Self| (action.f)(component, cx),
         );
     }
 }
diff --git a/src/base/action/component/before_prepare_component.rs b/src/base/action/component/before_prepare_component.rs
index 3df56379..f84b9e12 100644
--- a/src/base/action/component/before_prepare_component.rs
+++ b/src/base/action/component/before_prepare_component.rs
@@ -47,7 +47,7 @@ impl<C: ComponentTrait> BeforePrepareComponent<C> {
     pub(crate) fn dispatch(component: &mut C, cx: &mut Context, referer_id: Option<String>) {
         dispatch_actions(
             (TypeId::of::<Self>(), Some(TypeId::of::<C>()), referer_id),
-            |action| (action_ref::<BeforePrepareComponent<C>>(&**action).f)(component, cx),
+            |action: &Self| (action.f)(component, cx),
         );
     }
 }
diff --git a/src/base/action/page/after_prepare_body.rs b/src/base/action/page/after_prepare_body.rs
index 2a1c28a3..f8ea648a 100644
--- a/src/base/action/page/after_prepare_body.rs
+++ b/src/base/action/page/after_prepare_body.rs
@@ -25,8 +25,8 @@ impl AfterPrepareBody {
 
     #[inline(always)]
     pub(crate) fn dispatch(page: &mut Page) {
-        dispatch_actions((TypeId::of::<Self>(), None, None), |action| {
-            (action_ref::<AfterPrepareBody>(&**action).f)(page)
+        dispatch_actions((TypeId::of::<Self>(), None, None), |action: &Self| {
+            (action.f)(page)
         });
     }
 }
diff --git a/src/base/action/page/before_prepare_body.rs b/src/base/action/page/before_prepare_body.rs
index 4bfeb6da..1cf5f0eb 100644
--- a/src/base/action/page/before_prepare_body.rs
+++ b/src/base/action/page/before_prepare_body.rs
@@ -25,8 +25,8 @@ impl BeforePrepareBody {
 
     #[inline(always)]
     pub(crate) fn dispatch(page: &mut Page) {
-        dispatch_actions((TypeId::of::<Self>(), None, None), |action| {
-            (action_ref::<BeforePrepareBody>(&**action).f)(page)
+        dispatch_actions((TypeId::of::<Self>(), None, None), |action: &Self| {
+            (action.f)(page)
         });
     }
 }
diff --git a/src/core.rs b/src/core.rs
index 9830b881..f1ddc8b2 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -6,6 +6,8 @@ use std::any::Any;
 
 // Common definitions for core types.
 pub trait AnyBase: Any {
+    fn type_name(&self) -> &'static str;
+
     fn single_name(&self) -> &'static str;
 
     fn as_any_ref(&self) -> &dyn Any;
@@ -14,19 +16,55 @@ pub trait AnyBase: Any {
 }
 
 impl<T: Any> AnyBase for T {
-    fn single_name(&self) -> &'static str {
-        util::single_type_name::<Self>()
+    #[inline(always)]
+    fn type_name(&self) -> &'static str {
+        std::any::type_name::<T>()
     }
 
+    #[inline(always)]
+    fn single_name(&self) -> &'static str {
+        util::single_type_name::<T>()
+    }
+
+    #[inline(always)]
     fn as_any_ref(&self) -> &dyn Any {
         self
     }
 
+    #[inline(always)]
     fn as_any_mut(&mut self) -> &mut dyn Any {
         self
     }
 }
 
+pub trait AnyTo: AnyBase {
+    #[inline]
+    fn is<T>(&self) -> bool
+    where
+        T: AnyBase,
+    {
+        self.as_any_ref().is::<T>()
+    }
+
+    #[inline]
+    fn downcast_ref<T>(&self) -> Option<&T>
+    where
+        T: AnyBase,
+    {
+        self.as_any_ref().downcast_ref()
+    }
+
+    #[inline]
+    fn downcast_mut<T>(&mut self) -> Option<&mut T>
+    where
+        T: AnyBase,
+    {
+        self.as_any_mut().downcast_mut()
+    }
+}
+
+impl<T: ?Sized + AnyBase> AnyTo for T {}
+
 // API to define functions that alter the behavior of PageTop core.
 pub mod action;
 
diff --git a/src/core/action.rs b/src/core/action.rs
index f48e555f..e75041fa 100644
--- a/src/core/action.rs
+++ b/src/core/action.rs
@@ -1,5 +1,5 @@
 mod definition;
-pub use definition::{action_ref, ActionTrait};
+pub use definition::ActionTrait;
 
 mod list;
 pub use list::Action;
diff --git a/src/core/action/all.rs b/src/core/action/all.rs
index d7425140..30f96b74 100644
--- a/src/core/action/all.rs
+++ b/src/core/action/all.rs
@@ -1,4 +1,4 @@
-use crate::core::action::{Action, ActionsList};
+use crate::core::action::{Action, ActionTrait, ActionsList};
 use crate::{LazyStatic, TypeId};
 
 use std::collections::HashMap;
@@ -24,9 +24,10 @@ pub fn add_action(action: Action) {
     }
 }
 
-pub fn dispatch_actions<B, F>(key_action: KeyAction, f: F)
+pub fn dispatch_actions<A, B, F>(key_action: KeyAction, f: F)
 where
-    F: FnMut(&Action) -> B,
+    A: ActionTrait,
+    F: FnMut(&A) -> B,
 {
     if let Some(list) = ACTIONS.read().unwrap().get(&key_action) {
         list.iter_map(f)
diff --git a/src/core/action/definition.rs b/src/core/action/definition.rs
index 584d8b38..3e78ff69 100644
--- a/src/core/action/definition.rs
+++ b/src/core/action/definition.rs
@@ -14,7 +14,3 @@ pub trait ActionTrait: AnyBase + Send + Sync {
         0
     }
 }
-
-pub fn action_ref<A: 'static>(action: &dyn ActionTrait) -> &A {
-    action.as_any_ref().downcast_ref::<A>().unwrap()
-}
diff --git a/src/core/action/list.rs b/src/core/action/list.rs
index ab3dad48..dfed23e9 100644
--- a/src/core/action/list.rs
+++ b/src/core/action/list.rs
@@ -1,4 +1,6 @@
 use crate::core::action::ActionTrait;
+use crate::core::AnyTo;
+use crate::trace;
 use crate::AutoDefault;
 
 use std::sync::{Arc, RwLock};
@@ -21,12 +23,25 @@ impl ActionsList {
         list.sort_by_key(|a| a.weight());
     }
 
-    pub fn iter_map<B, F>(&self, f: F)
+    pub fn iter_map<A, B, F>(&self, mut f: F)
     where
         Self: Sized,
-        F: FnMut(&Action) -> B,
+        A: ActionTrait,
+        F: FnMut(&A) -> B,
     {
-        let _: Vec<_> = self.0.read().unwrap().iter().map(f).collect();
+        let _: Vec<_> = self
+            .0
+            .read()
+            .unwrap()
+            .iter()
+            .map(|a| {
+                if let Some(action) = (&**a).downcast_ref::<A>() {
+                    f(action);
+                } else {
+                    trace::error!("Failed to downcast action of type {}", (&**a).type_name());
+                }
+            })
+            .collect();
     }
 }
 
diff --git a/src/core/component.rs b/src/core/component.rs
index 34a6147a..b17770fb 100644
--- a/src/core/component.rs
+++ b/src/core/component.rs
@@ -6,7 +6,7 @@ mod renderable;
 pub use renderable::{FnIsRenderable, Renderable};
 
 mod definition;
-pub use definition::{component_as_mut, component_as_ref, ComponentBase, ComponentTrait};
+pub use definition::{ComponentBase, ComponentTrait};
 
 mod classes;
 pub use classes::{ComponentClasses, ComponentClassesOp};
diff --git a/src/core/component/definition.rs b/src/core/component/definition.rs
index b9f74ed2..34e8b640 100644
--- a/src/core/component/definition.rs
+++ b/src/core/component/definition.rs
@@ -83,11 +83,3 @@ impl<C: ComponentTrait> ComponentBase for C {
         }
     }
 }
-
-pub fn component_as_ref<C: ComponentTrait>(component: &dyn ComponentTrait) -> Option<&C> {
-    component.as_any_ref().downcast_ref::<C>()
-}
-
-pub fn component_as_mut<C: ComponentTrait>(component: &mut dyn ComponentTrait) -> Option<&mut C> {
-    component.as_any_mut().downcast_mut::<C>()
-}
diff --git a/src/core/theme/definition.rs b/src/core/theme/definition.rs
index 26b1ba68..b694966f 100644
--- a/src/core/theme/definition.rs
+++ b/src/core/theme/definition.rs
@@ -93,7 +93,7 @@ pub trait ThemeTrait: PackageTrait + Send + Sync {
 
             match component.type_id() {
                 t if t == TypeId::of::<Block>() => {
-                    if let Some(b) = component_as_mut::<Block>(component) {
+                    if let Some(b) = component.downcast_mut::<Block>() {
                         b.alter_title("New title");
                     }
                 },
@@ -114,7 +114,7 @@ pub trait ThemeTrait: PackageTrait + Send + Sync {
 
             match component.type_id() {
                 t if t == TypeId::of::<Block>() => {
-                    if let Some(b) = component_as_mut::<Block>(component) {
+                    if let Some(b) = component.downcast_mut::<Block>() {
                         b.alter_title("New title");
                     }
                 },
diff --git a/src/prelude.rs b/src/prelude.rs
index ad9e89fc..7ad1ab5a 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -42,7 +42,7 @@ pub use crate::{db, db::*, migrations, new_migration};
 pub use crate::service;
 pub use crate::service::{HttpMessage, HttpRequest};
 
-pub use crate::core::AnyBase;
+pub use crate::core::{AnyBase, AnyTo};
 
 pub use crate::core::action::*;
 pub use crate::core::component::*;