diff --git a/pagetop/src/core/component/context.rs b/pagetop/src/core/component/context.rs
index 1b12f955..16a077a7 100644
--- a/pagetop/src/core/component/context.rs
+++ b/pagetop/src/core/component/context.rs
@@ -1,6 +1,6 @@
 use crate::core::theme::all::{theme_by_single_name, THEME};
 use crate::core::theme::ThemeStaticRef;
-use crate::html::{html, Assets, JavaScript, Markup, StyleSheet};
+use crate::html::{html, Assets, HeadScript, HeadStyles, JavaScript, Markup, StyleSheet};
 use crate::locale::{LanguageIdentifier, LANGID};
 use crate::service::HttpRequest;
 use crate::{concat_string, util};
@@ -11,21 +11,31 @@ use std::str::FromStr;
 pub enum ContextOp {
     LangId(&'static LanguageIdentifier),
     Theme(&'static str),
+    // Stylesheets.
     AddStyleSheet(StyleSheet),
     RemoveStyleSheet(&'static str),
+    // Styles in head.
+    AddHeadStyles(HeadStyles),
+    RemoveHeadStyles(&'static str),
+    // JavaScripts.
     AddJavaScript(JavaScript),
     RemoveJavaScript(&'static str),
+    // Scripts in head.
+    AddHeadScript(HeadScript),
+    RemoveHeadScript(&'static str),
 }
 
 #[rustfmt::skip]
 pub struct Context {
-    request    : HttpRequest,
-    langid     : &'static LanguageIdentifier,
-    theme      : ThemeStaticRef,
-    stylesheets: Assets<StyleSheet>,
-    javascripts: Assets<JavaScript>,
-    params     : HashMap<&'static str, String>,
-    id_counter : usize,
+    request   : HttpRequest,
+    langid    : &'static LanguageIdentifier,
+    theme     : ThemeStaticRef,
+    stylesheet: Assets<StyleSheet>,                     // Stylesheets.
+    headstyles: Assets<HeadStyles>,                     // Styles in head.
+    javascript: Assets<JavaScript>,                     // JavaScripts.
+    headscript: Assets<HeadScript>,                     // Scripts in head.
+    params    : HashMap<&'static str, String>,
+    id_counter: usize,
 }
 
 impl Context {
@@ -33,15 +43,18 @@ impl Context {
     pub(crate) fn new(request: HttpRequest) -> Self {
         Context {
             request,
-            langid     : &LANGID,
-            theme      : *THEME,
-            stylesheets: Assets::<StyleSheet>::new(),
-            javascripts: Assets::<JavaScript>::new(),
-            params     : HashMap::<&str, String>::new(),
-            id_counter : 0,
+            langid    : &LANGID,
+            theme     : *THEME,
+            stylesheet: Assets::<StyleSheet>::new(),    // Stylesheets.
+            headstyles: Assets::<HeadStyles>::new(),    // Styles in head.
+            javascript: Assets::<JavaScript>::new(),    // JavaScripts.
+            headscript: Assets::<HeadScript>::new(),    // Scripts in head.
+            params    : HashMap::<&str, String>::new(),
+            id_counter: 0,
         }
     }
 
+    #[rustfmt::skip]
     pub fn alter(&mut self, op: ContextOp) -> &mut Self {
         match op {
             ContextOp::LangId(langid) => {
@@ -50,18 +63,18 @@ impl Context {
             ContextOp::Theme(theme_name) => {
                 self.theme = theme_by_single_name(theme_name).unwrap_or(*THEME);
             }
-            ContextOp::AddStyleSheet(css) => {
-                self.stylesheets.add(css);
-            }
-            ContextOp::RemoveStyleSheet(source) => {
-                self.stylesheets.remove(source);
-            }
-            ContextOp::AddJavaScript(js) => {
-                self.javascripts.add(js);
-            }
-            ContextOp::RemoveJavaScript(source) => {
-                self.javascripts.remove(source);
-            }
+            // Stylesheets.
+            ContextOp::AddStyleSheet(css)     => { self.stylesheet.add(css);     }
+            ContextOp::RemoveStyleSheet(path) => { self.stylesheet.remove(path); }
+            // Styles in head.
+            ContextOp::AddHeadStyles(styles)  => { self.headstyles.add(styles);  }
+            ContextOp::RemoveHeadStyles(path) => { self.headstyles.remove(path); }
+            // JavaScripts.
+            ContextOp::AddJavaScript(js)      => { self.javascript.add(js);      }
+            ContextOp::RemoveJavaScript(path) => { self.javascript.remove(path); }
+            // Scripts in head.
+            ContextOp::AddHeadScript(script)  => { self.headscript.add(script);  }
+            ContextOp::RemoveHeadScript(path) => { self.headscript.remove(path); }
         }
         self
     }
@@ -71,6 +84,11 @@ impl Context {
         self
     }
 
+    pub fn remove_param(&mut self, key: &'static str) -> &mut Self {
+        self.params.remove(key);
+        self
+    }
+
     /// Context GETTERS.
 
     pub fn request(&self) -> &HttpRequest {
@@ -98,8 +116,10 @@ impl Context {
 
     pub fn prepare(&mut self) -> Markup {
         html! {
-            (self.stylesheets.prepare())
-            (self.javascripts.prepare())
+            (self.stylesheet.prepare())                 // Stylesheets.
+            (self.headstyles.prepare())                 // Styles in head.
+            (self.javascript.prepare())                 // JavaScripts.
+            (self.headscript.prepare())                 // Scripts in head.
         }
     }
 
diff --git a/pagetop/src/html.rs b/pagetop/src/html.rs
index b9dbd78e..c0ebacc5 100644
--- a/pagetop/src/html.rs
+++ b/pagetop/src/html.rs
@@ -4,6 +4,8 @@ mod maud;
 pub use maud::{html, html_private, Markup, PreEscaped, DOCTYPE};
 
 mod assets;
+pub use assets::headscript::HeadScript;
+pub use assets::headstyles::HeadStyles;
 pub use assets::javascript::{JavaScript, ModeJS};
 pub use assets::stylesheet::{StyleSheet, TargetMedia};
 pub use assets::Assets;
diff --git a/pagetop/src/html/assets.rs b/pagetop/src/html/assets.rs
index 6ca33c81..2006dae7 100644
--- a/pagetop/src/html/assets.rs
+++ b/pagetop/src/html/assets.rs
@@ -1,10 +1,12 @@
+pub mod headscript;
+pub mod headstyles;
 pub mod javascript;
 pub mod stylesheet;
 
 use crate::html::{html, Markup};
 
 pub trait AssetsTrait {
-    fn source(&self) -> &str;
+    fn path(&self) -> &str;
 
     fn weight(&self) -> isize;
 
@@ -20,7 +22,7 @@ impl<T: AssetsTrait> Assets<T> {
     }
 
     pub fn add(&mut self, asset: T) -> &mut Self {
-        match self.0.iter().position(|x| x.source() == asset.source()) {
+        match self.0.iter().position(|x| x.path() == asset.path()) {
             Some(index) => {
                 if self.0[index].weight() > asset.weight() {
                     self.0.remove(index);
@@ -32,8 +34,8 @@ impl<T: AssetsTrait> Assets<T> {
         self
     }
 
-    pub fn remove(&mut self, source: &'static str) -> &mut Self {
-        if let Some(index) = self.0.iter().position(|x| x.source() == source) {
+    pub fn remove(&mut self, path: &'static str) -> &mut Self {
+        if let Some(index) = self.0.iter().position(|x| x.path() == path) {
             self.0.remove(index);
         };
         self
diff --git a/pagetop/src/html/assets/headscript.rs b/pagetop/src/html/assets/headscript.rs
new file mode 100644
index 00000000..ed7eccd5
--- /dev/null
+++ b/pagetop/src/html/assets/headscript.rs
@@ -0,0 +1,46 @@
+use super::AssetsTrait;
+use crate::html::{html, Markup};
+
+#[rustfmt::skip]
+#[derive(Default)]
+pub struct HeadScript {
+    path  : String,
+    code  : String,
+    weight: isize,
+}
+
+impl AssetsTrait for HeadScript {
+    fn path(&self) -> &str {
+        self.path.as_str()
+    }
+
+    fn weight(&self) -> isize {
+        self.weight
+    }
+
+    fn prepare(&self) -> Markup {
+        html! { script { (self.code) }; }
+    }
+}
+
+impl HeadScript {
+    pub fn named<S>(path: S) -> Self
+    where
+        S: Into<String>,
+    {
+        HeadScript {
+            path: path.into(),
+            ..Default::default()
+        }
+    }
+
+    pub fn with_code(mut self, code: &str) -> Self {
+        self.code = code.trim().to_owned();
+        self
+    }
+
+    pub fn with_weight(mut self, weight: isize) -> Self {
+        self.weight = weight;
+        self
+    }
+}
diff --git a/pagetop/src/html/assets/headstyles.rs b/pagetop/src/html/assets/headstyles.rs
new file mode 100644
index 00000000..888ef21e
--- /dev/null
+++ b/pagetop/src/html/assets/headstyles.rs
@@ -0,0 +1,46 @@
+use super::AssetsTrait;
+use crate::html::{html, Markup};
+
+#[rustfmt::skip]
+#[derive(Default)]
+pub struct HeadStyles {
+    path  : String,
+    styles: String,
+    weight: isize,
+}
+
+impl AssetsTrait for HeadStyles {
+    fn path(&self) -> &str {
+        self.path.as_str()
+    }
+
+    fn weight(&self) -> isize {
+        self.weight
+    }
+
+    fn prepare(&self) -> Markup {
+        html! { styles { (self.styles) }; }
+    }
+}
+
+impl HeadStyles {
+    pub fn named<S>(path: S) -> Self
+    where
+        S: Into<String>,
+    {
+        HeadStyles {
+            path: path.into(),
+            ..Default::default()
+        }
+    }
+
+    pub fn with_styles(mut self, styles: &str) -> Self {
+        self.styles = styles.trim().to_owned();
+        self
+    }
+
+    pub fn with_weight(mut self, weight: isize) -> Self {
+        self.weight = weight;
+        self
+    }
+}
diff --git a/pagetop/src/html/assets/javascript.rs b/pagetop/src/html/assets/javascript.rs
index 848c81bc..44af052a 100644
--- a/pagetop/src/html/assets/javascript.rs
+++ b/pagetop/src/html/assets/javascript.rs
@@ -12,14 +12,16 @@ pub enum ModeJS {
 #[rustfmt::skip]
 #[derive(Default)]
 pub struct JavaScript {
-    source : String,
+    path   : String,
+    prefix : &'static str,
+    version: &'static str,
     weight : isize,
     mode   : ModeJS,
 }
 
 impl AssetsTrait for JavaScript {
-    fn source(&self) -> &str {
-        self.source.as_str()
+    fn path(&self) -> &str {
+        self.path.as_str()
     }
 
     fn weight(&self) -> isize {
@@ -29,7 +31,7 @@ impl AssetsTrait for JavaScript {
     fn prepare(&self) -> Markup {
         html! {
             script type="text/javascript"
-                src=(self.source)
+                src=(crate::concat_string!(self.path, self.prefix, self.version))
                 async[self.mode == ModeJS::Async]
                 defer[self.mode == ModeJS::Defer]
                 {};
@@ -38,16 +40,25 @@ impl AssetsTrait for JavaScript {
 }
 
 impl JavaScript {
-    pub fn located<S>(source: S) -> Self
+    pub fn located<S>(path: S) -> Self
     where
         S: Into<String>,
     {
         JavaScript {
-            source: source.into(),
+            path: path.into(),
             ..Default::default()
         }
     }
 
+    pub fn with_version(mut self, version: &'static str) -> Self {
+        (self.prefix, self.version) = if version.is_empty() {
+            ("", "")
+        } else {
+            ("?v=", version)
+        };
+        self
+    }
+
     pub fn with_weight(mut self, weight: isize) -> Self {
         self.weight = weight;
         self
diff --git a/pagetop/src/html/assets/stylesheet.rs b/pagetop/src/html/assets/stylesheet.rs
index 0afecfb7..c8347591 100644
--- a/pagetop/src/html/assets/stylesheet.rs
+++ b/pagetop/src/html/assets/stylesheet.rs
@@ -11,14 +11,16 @@ pub enum TargetMedia {
 #[rustfmt::skip]
 #[derive(Default)]
 pub struct StyleSheet {
-    source : String,
+    path   : String,
+    prefix : &'static str,
+    version: &'static str,
     media  : Option<&'static str>,
     weight : isize,
 }
 
 impl AssetsTrait for StyleSheet {
-    fn source(&self) -> &str {
-        self.source.as_str()
+    fn path(&self) -> &str {
+        self.path.as_str()
     }
 
     fn weight(&self) -> isize {
@@ -26,21 +28,35 @@ impl AssetsTrait for StyleSheet {
     }
 
     fn prepare(&self) -> Markup {
-        html! { link rel="stylesheet" href=(self.source) media=[self.media]; }
+        html! {
+            link
+                rel="stylesheet"
+                href=(crate::concat_string!(self.path, self.prefix, self.version))
+                media=[self.media];
+        }
     }
 }
 
 impl StyleSheet {
-    pub fn located<S>(source: S) -> Self
+    pub fn located<S>(path: S) -> Self
     where
         S: Into<String>,
     {
         StyleSheet {
-            source: source.into(),
+            path: path.into(),
             ..Default::default()
         }
     }
 
+    pub fn with_version(mut self, version: &'static str) -> Self {
+        (self.prefix, self.version) = if version.is_empty() {
+            ("", "")
+        } else {
+            ("?v=", version)
+        };
+        self
+    }
+
     pub fn with_weight(mut self, weight: isize) -> Self {
         self.weight = weight;
         self