diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..d7a3b2c
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,130 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.12.1] - 2026-04-01
+
+### Fixed
+- `href` getter now includes the hash fragment when `NavOpts` is constructed from a path array (previously the hash was silently dropped, breaking `history.pushState` for hash-based navigation)
+- Hash is now preserved through redirects in `resolveCurrent()`
+
+### Changed
+- Added `sideEffects: false` to both packages' `package.json` — bundlers can now tree-shake unused exports (e.g. drop `restoreHandling` when only `createRouter` is imported)
+- Minor bundle size reduction: removed dead code in `scroll-restoration`, replaced `new Array()` with `[]`
+
+## [0.12.0] - 2026-04-01
+
+### Added
+- Type-safe routing: `createRouter` now infers a `RoutePaths` type from the routes configuration, and `router.go()` enforces typed paths at compile time
+- Typed state: `NavOpts<S>` and `createRouter<T, S>` are now generic over the state type
+
+### Fixed
+- `NavOpts.state` is now always `null` instead of `undefined` when no state is provided
+- Route resolution now correctly returns not-found when an intermediate path segment is unmatched (previously could match a route deeper in the tree)
+
+## [0.11.1] - 2026-03-31
+
+### Fixed
+- Source maps are now included in the published npm package
+
+## [0.11.0] - 2025-10-21
+
+### Added
+- `router.render(defer?)` — pass a defer function to batch multiple successive navigations without intermediate renders. The router resolves only the final navigation once the deferred work completes.
+
+## [0.10.0] - 2025-04-17
+
+### Fixed
+- Search params passed via `NavMeta` are no longer overridden by the search string embedded in an href
+- State defaults to `null` (previously could be `undefined`)
+
+## [0.9.0] - 2024-04-16
+
+### Added
+- `router.go()` now accepts a function `(prev: NavOpts) => NavMeta` to patch the current navigation state in place (uses `replaceState` by default)
+
+### Fixed
+- Corrected TypeScript overload types for `router.go()`
+
+## [0.8.3] - 2024-04-16
+
+### Added
+- `router.current` exposes the current `NavOpts` after the last completed resolution
+
+## [0.8.1] - 2024-01-17
+
+### Fixed
+- Router no longer becomes permanently unresponsive when a route resolution promise rejects
+
+## [0.8.0] - 2023-04-12
+
+### Added
+- Scroll restoration via `restoreHandling()` — saves and restores scroll position on navigation, supports hash-based anchor scrolling and a configurable container/offset
+
+### Changed
+- `NavOpts` now exposes `hash` and `pop` fields
+
+## [0.6.0] - 2022-10-18
+
+### Added
+- Guards: add a `"?"` key to any route object to register a guard function. If the guard returns a `NavOpts`, the navigation is redirected.
+- `routes` is now optional in `createRouter()` (defaults to `{}`)
+
+## [0.5.4] - 2022-09-21
+
+### Added
+- `router.routes` is now exposed on the `Router` interface, allowing routes to be modified after creation
+
+### Fixed
+- Fixed virtual route (`""` key) resolution ordering
+
+## [0.5.0] - 2022-09-18
+
+### Changed
+- **Breaking**: `createRouter` is now a factory function instead of a class — use `createRouter({ routes, ... })` instead of `new Router(...)`)
+- Reduced bundle size by removing unused abstractions
+
+### Removed
+- `NavOpts.equals()` method
+
+## [0.4.2] - 2022-07-01
+
+### Fixed
+- Guard was not being called on index routes (`""` key)
+- Fixed ESM import paths in `@esroute/lit`
+
+## [0.4.1] - 2022-04-18
+
+### Added
+- `@esroute/lit` package: `renderRoutes` Lit directive for declarative route rendering in Lit components
+
+## [0.3.0] - 2022-04-13
+
+### Changed
+- Converted the resolver to a plain function for better tree-shaking
+- Route spec compilation is now opt-in (not compiled by default)
+
+## [0.2.0] - 2022-04-08
+
+### Added
+- Deep link support in the route spec (nested path configuration)
+
+## [0.1.1] - 2022-01-01
+
+### Fixed
+- Minor fixes and dependency updates
+
+## [0.1.0] - 2022-01-01
+
+### Added
+- Initial release of `esroute`
+- Framework-agnostic client-side router with `createRouter()`
+- Path-based route matching with wildcard (`*`) support
+- Virtual routes (`""` key) for middleware/layout patterns
+- Anchor click interception
+- Promise-based serialized navigation
diff --git a/packages/esroute-lit/package.json b/packages/esroute-lit/package.json
index e8d0535..8088d4a 100644
--- a/packages/esroute-lit/package.json
+++ b/packages/esroute-lit/package.json
@@ -1,8 +1,9 @@
 {
   "name": "@esroute/lit",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "description": "A small efficient client-side routing library for lit, written in TypeScript.",
   "main": "dist/index.js",
+  "sideEffects": false,
   "license": "MIT",
   "author": "Sven Rogge <mail@sven-rogge.com>",
   "repository": "github:sv2dev/esroute",
@@ -21,7 +22,7 @@
     "typescript": "^5.4.5"
   },
   "dependencies": {
-    "esroute": "^0.12.0",
+    "esroute": "^0.12.1",
     "lit": "^3.1.1"
   }
 }
diff --git a/packages/esroute/package.json b/packages/esroute/package.json
index 2a64131..42f450e 100644
--- a/packages/esroute/package.json
+++ b/packages/esroute/package.json
@@ -1,9 +1,10 @@
 {
   "name": "esroute",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "description": "A small efficient framework-agnostic client-side routing library, written in TypeScript.",
   "types": "dist/index.d.ts",
   "main": "dist/index.js",
+  "sideEffects": false,
   "license": "MIT",
   "author": "Sven Rogge <mail@sven-rogge.com>",
   "repository": "github:sv2dev/esroute",
diff --git a/packages/esroute/src/nav-opts.spec.ts b/packages/esroute/src/nav-opts.spec.ts
index d0813b4..c77d187 100644
--- a/packages/esroute/src/nav-opts.spec.ts
+++ b/packages/esroute/src/nav-opts.spec.ts
@@ -97,6 +97,23 @@ describe("NavOpts", () => {
     });
   });
 
+  describe("href with hash", () => {
+    it("should include hash in href when constructed from path array", () => {
+      const opts = new NavOpts(["foo"], { hash: "section" });
+      expect(opts.href).toBe("/foo#section");
+    });
+
+    it("should include both search and hash in href", () => {
+      const opts = new NavOpts(["foo"], { search: { a: "b" }, hash: "top" });
+      expect(opts.href).toBe("/foo?a=b#top");
+    });
+
+    it("should include hash in href when constructed from StrictNavMeta", () => {
+      const opts = new NavOpts({ path: ["foo"], hash: "bar" });
+      expect(opts.href).toBe("/foo#bar");
+    });
+  });
+
   describe("go", () => {
     it("should create a new NavigateOpts instance with a new path", () => {
       const opts1 = new NavOpts(["a", "b"]);
diff --git a/packages/esroute/src/nav-opts.ts b/packages/esroute/src/nav-opts.ts
index baf2f9b..59ffe83 100644
--- a/packages/esroute/src/nav-opts.ts
+++ b/packages/esroute/src/nav-opts.ts
@@ -73,7 +73,7 @@ export class NavOpts<S = null> implements NavMeta<S> {
     if (!this._h) {
       const s = new URLSearchParams(this.search).toString();
       const p = `/${this.path!.join("/")}`;
-      this._h = `${p}${s ? `?${s}` : ""}`;
+      this._h = `${p}${s ? `?${s}` : ""}${this.hash ? `#${this.hash}` : ""}`;
     }
     return this._h;
   }
diff --git a/packages/esroute/src/route-resolver.ts b/packages/esroute/src/route-resolver.ts
index cde9c31..b69ec2f 100644
--- a/packages/esroute/src/route-resolver.ts
+++ b/packages/esroute/src/route-resolver.ts
@@ -22,7 +22,7 @@ export const resolve = async <T, S = any>(
   notFound: Resolve<T, S>
 ): Promise<Resolved<T, S>> => {
   let value: NavOpts<S> | T = opts;
-  const navPath = new Array<NavOpts<S>>();
+  const navPath: NavOpts<S>[] = [];
   while (value instanceof NavOpts && navPath.length <= MAX_REDIRECTS) {
     opts = value;
     navPath.push(opts);
diff --git a/packages/esroute/src/router.ts b/packages/esroute/src/router.ts
index a287e7f..f9c68a2 100644
--- a/packages/esroute/src/router.ts
+++ b/packages/esroute/src/router.ts
@@ -221,6 +221,7 @@ export const createRouter = <T = any, S = any, R extends RawRoutes = RawRoutes>(
           replace: true,
           search: opts.search,
           state: opts.state,
+          hash: opts.hash,
         })
       );
     }
diff --git a/packages/esroute/src/scroll-restoration.ts b/packages/esroute/src/scroll-restoration.ts
index ec4a39f..0970167 100644
--- a/packages/esroute/src/scroll-restoration.ts
+++ b/packages/esroute/src/scroll-restoration.ts
@@ -32,14 +32,11 @@ export const restoreHandling = ({
       offset +
       container.scrollTop);
 
-  if (save) {
-    window.addEventListener("beforeunload", save);
-    window.addEventListener("visibilitychange", save);
-  }
+  window.addEventListener("beforeunload", save);
+  document.addEventListener("visibilitychange", save);
   window.addEventListener("popstate", () => set(getStatePos()));
   return ({ opts: { hash, pop } }: { opts: NavOpts }) => {
     const fromState = getStatePos();
-    console.log(location.pathname, pop, fromState);
     if (fromState) return set(fromState);
     if (!fromState && hash && getHashPos) return set(getHashPos(hash));
     container.scrollTop = 0;