diff --git a/dunge/src/bind.rs b/dunge/src/bind.rs
index eb33fb2..549f940 100644
--- a/dunge/src/bind.rs
+++ b/dunge/src/bind.rs
@@ -170,6 +170,9 @@ impl TypedGroup {
     }
 }
 
+/// The group binder type.
+///
+/// Can be created using the context's [`make_binder`](crate::Context::make_binder) function.
 pub struct Binder<'a> {
     shader_id: usize,
     device: &'a Device,
@@ -188,7 +191,17 @@ impl<'a> Binder<'a> {
         }
     }
 
-    pub fn bind<G>(&mut self, group: &G) -> GroupHandler<G::Projection>
+    /// Adds a group to the associated shader's binding.
+    ///
+    /// It returns a [group handler](GroupHandler) that can be used to update
+    /// the data in this binding. If you don't need to update the data, then
+    /// discard this handler.
+    ///
+    /// # Panic
+    /// It checks the group type matches to an associated shader's group at runtime.
+    /// If it's violated or there are more bindings than in the shader,
+    /// then this function will panic.
+    pub fn add<G>(&mut self, group: &G) -> GroupHandler<G::Projection>
     where
         G: Visit,
     {
@@ -221,6 +234,11 @@ impl<'a> Binder<'a> {
         }
     }
 
+    /// Constructs an object that can be [used](crate::layer::SetLayer::bind)
+    /// in the draw stage.
+    ///
+    /// # Panic
+    /// It will panic if some group bindings is not set.
     pub fn into_binding(self) -> UniqueBinding {
         assert!(
             self.groups.len() == self.layout.len(),
diff --git a/dunge/src/context.rs b/dunge/src/context.rs
index d59bee2..170bbed 100644
--- a/dunge/src/context.rs
+++ b/dunge/src/context.rs
@@ -17,8 +17,6 @@ use {
 
 /// Creates the context instance.
 ///
-/// If you need a window call the [`window`] function.
-///
 /// # Errors
 /// Returns an error when the context could not be created.
 /// See [`FailedMakeContext`] for details.
diff --git a/dunge/src/shader.rs b/dunge/src/shader.rs
index 2b785a6..297c9b4 100644
--- a/dunge/src/shader.rs
+++ b/dunge/src/shader.rs
@@ -12,6 +12,9 @@ use {
     },
 };
 
+/// The shader type.
+///
+/// Can be created using the context's [`make_shader`](crate::Context::make_shader) function.
 pub struct Shader<V, I> {
     inner: Inner,
     wgsl: String,
diff --git a/dunge/tests/triangle_discard.rs b/dunge/tests/triangle_discard.rs
index 42da6ce..8a1ffbc 100644
--- a/dunge/tests/triangle_discard.rs
+++ b/dunge/tests/triangle_discard.rs
@@ -60,7 +60,7 @@ fn render() -> Result<(), Error> {
         };
 
         let mut binder = cx.make_binder(&shader);
-        binder.bind(&map);
+        binder.add(&map);
         binder.into_binding()
     };
 
diff --git a/dunge/tests/triangle_group.rs b/dunge/tests/triangle_group.rs
index 17c7a9b..de1bfe6 100644
--- a/dunge/tests/triangle_group.rs
+++ b/dunge/tests/triangle_group.rs
@@ -56,7 +56,7 @@ fn render() -> Result<(), Error> {
         };
 
         let mut binder = cx.make_binder(&shader);
-        binder.bind(&map);
+        binder.add(&map);
         binder.into_binding()
     };
 
diff --git a/examples/cube/src/lib.rs b/examples/cube/src/lib.rs
index f298a48..d92ed19 100644
--- a/examples/cube/src/lib.rs
+++ b/examples/cube/src/lib.rs
@@ -48,7 +48,7 @@ pub async fn run(ws: dunge::window::WindowState) -> Result<(), Error> {
     let bind_transform = {
         let tr = Transform(&uniform);
         let mut binder = cx.make_binder(&cube_shader);
-        binder.bind(&tr);
+        binder.add(&tr);
         binder.into_binding()
     };
 
diff --git a/examples/ssaa/src/lib.rs b/examples/ssaa/src/lib.rs
index 96feb00..93884ab 100644
--- a/examples/ssaa/src/lib.rs
+++ b/examples/ssaa/src/lib.rs
@@ -69,7 +69,7 @@ pub async fn run(ws: dunge::window::WindowState) -> Result<(), Error> {
     let bind = {
         let offset = Offset(&uniform);
         let mut binder = cx.make_binder(&triangle_shader);
-        binder.bind(&offset);
+        binder.add(&offset);
         binder.into_binding()
     };
 
@@ -105,7 +105,7 @@ pub async fn run(ws: dunge::window::WindowState) -> Result<(), Error> {
         };
 
         let mut binder = cx.make_binder(&screen_shader);
-        let handler = binder.bind(&map);
+        let handler = binder.add(&map);
         (binder.into_binding(), handler)
     };
 
diff --git a/examples/triangle/src/lib.rs b/examples/triangle/src/lib.rs
index bde4351..449ca2a 100644
--- a/examples/triangle/src/lib.rs
+++ b/examples/triangle/src/lib.rs
@@ -32,7 +32,7 @@ pub async fn run(ws: dunge::window::WindowState) -> Result<(), Error> {
     let bind = {
         let offset = Offset(&uniform);
         let mut binder = cx.make_binder(&shader);
-        binder.bind(&offset);
+        binder.add(&offset);
         binder.into_binding()
     };
 
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
index 4d08638..147a4db 100644
--- a/xtask/src/main.rs
+++ b/xtask/src/main.rs
@@ -179,10 +179,10 @@ fn serve(Opts { module, .. }: Opts) -> Result<(), Error> {
     let html = index.render()?.leak();
     let prefix = "xtask/web";
     let strip = |s: &'static str| -> &'static str { s.strip_prefix(prefix).expect("strip") };
-    let js_path = format!("{prefix}/{module}/wasm.js").leak();
-    let wasm_path = format!("{prefix}/{module}/wasm_bg.wasm").leak();
-    let js = fs::read_to_string(&js_path)?.leak();
-    let wasm = fs::read(&wasm_path)?.leak();
+    let js_path: &str = format!("{prefix}/{module}/wasm.js").leak();
+    let wasm_path: &str = format!("{prefix}/{module}/wasm_bg.wasm").leak();
+    let js = fs::read_to_string(js_path)?.leak();
+    let wasm = fs::read(wasm_path)?.leak();
     let routes = &[
         ("/", Page::html(html)),
         ("/favicon.ico", Page::html("")),