diff --git a/src/changelog/unreleased.md b/src/changelog/unreleased.md
index 12b7b471..210e1b0b 100644
--- a/src/changelog/unreleased.md
+++ b/src/changelog/unreleased.md
@@ -78,6 +78,7 @@ changelog entry.
 - Implement `CustomIconProvider` for `RgbaIcon`.
 - Add `icon` module that exposes winit's icon API.
 - `VideoMode::new` to create a `VideoMode`.
+- `keyboard::ModifiersKey` to track which modifier is exactly pressed.
 
 ### Changed
 
diff --git a/src/lib.rs b/src/lib.rs
index 87109d43..ff1438e9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -305,8 +305,7 @@ mod cursor;
 pub mod event;
 pub mod event_loop;
 pub mod icon;
-pub mod keyboard;
-pub use winit_core::monitor;
+pub use winit_core::{keyboard, monitor};
 mod platform_impl;
 use winit_core::as_any as utils;
 pub mod window;
diff --git a/src/platform_impl/web/keyboard.rs b/src/platform_impl/web/keyboard.rs
index e1b0e7e6..83c3c1ab 100644
--- a/src/platform_impl/web/keyboard.rs
+++ b/src/platform_impl/web/keyboard.rs
@@ -2,8 +2,14 @@ use smol_str::SmolStr;
 
 use crate::keyboard::{Key, KeyCode, NamedKey, NativeKey, NativeKeyCode, PhysicalKey};
 
-impl Key {
-    pub(crate) fn from_key_attribute_value(kav: &str) -> Self {
+pub trait FromAttributeValue {
+    fn from_attribute_value(kav: &str) -> Self
+    where
+        Self: Sized;
+}
+
+impl FromAttributeValue for Key {
+    fn from_attribute_value(kav: &str) -> Self {
         Key::Named(match kav {
             "Unidentified" => return Key::Unidentified(NativeKey::Web(SmolStr::new(kav))),
             "Dead" => return Key::Dead(None),
@@ -319,8 +325,8 @@ impl Key {
     }
 }
 
-impl PhysicalKey {
-    pub fn from_key_code_attribute_value(kcav: &str) -> Self {
+impl FromAttributeValue for PhysicalKey {
+    fn from_attribute_value(kcav: &str) -> Self {
         PhysicalKey::Code(match kcav {
             "Backquote" => KeyCode::Backquote,
             "Backslash" => KeyCode::Backslash,
diff --git a/src/platform_impl/web/web_sys/event.rs b/src/platform_impl/web/web_sys/event.rs
index dbecbf39..df7c590c 100644
--- a/src/platform_impl/web/web_sys/event.rs
+++ b/src/platform_impl/web/web_sys/event.rs
@@ -9,6 +9,7 @@ use web_sys::{KeyboardEvent, MouseEvent, Navigator, PointerEvent, WheelEvent};
 use super::Engine;
 use crate::event::{FingerId, MouseButton, MouseScrollDelta, PointerKind};
 use crate::keyboard::{Key, KeyLocation, ModifiersState, NamedKey, PhysicalKey};
+use crate::platform_impl::web::keyboard::FromAttributeValue;
 
 bitflags::bitflags! {
     // https://www.w3.org/TR/pointerevents3/#the-buttons-property
@@ -170,16 +171,16 @@ pub fn pointer_type(event: &PointerEvent, pointer_id: i32) -> PointerKind {
 
 pub fn key_code(event: &KeyboardEvent) -> PhysicalKey {
     let code = event.code();
-    PhysicalKey::from_key_code_attribute_value(&code)
+    PhysicalKey::from_attribute_value(&code)
 }
 
 pub fn key(event: &KeyboardEvent) -> Key {
-    Key::from_key_attribute_value(&event.key())
+    Key::from_attribute_value(&event.key())
 }
 
 pub fn key_text(event: &KeyboardEvent) -> Option<SmolStr> {
     let key = event.key();
-    let key = Key::from_key_attribute_value(&key);
+    let key = Key::from_attribute_value(&key);
     match &key {
         Key::Character(text) => Some(text.clone()),
         Key::Named(NamedKey::Tab) => Some(SmolStr::new("\t")),
diff --git a/src/keyboard.rs b/winit-core/src/keyboard.rs
similarity index 99%
rename from src/keyboard.rs
rename to winit-core/src/keyboard.rs
index f1838d9f..3f41d1c6 100644
--- a/src/keyboard.rs
+++ b/winit-core/src/keyboard.rs
@@ -1750,7 +1750,7 @@ pub enum ModifiersKeyState {
 bitflags! {
     #[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Hash)]
     #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-    pub(crate) struct ModifiersKeys: u8 {
+    pub struct ModifiersKeys: u8 {
         const LSHIFT   = 0b0000_0001;
         const RSHIFT   = 0b0000_0010;
         const LCONTROL = 0b0000_0100;
diff --git a/winit-core/src/lib.rs b/winit-core/src/lib.rs
index 440c3393..676399e4 100644
--- a/winit-core/src/lib.rs
+++ b/winit-core/src/lib.rs
@@ -1,3 +1,4 @@
 #[macro_use]
 pub mod as_any;
+pub mod keyboard;
 pub mod monitor;