diff --git a/.github/workflows/check-tree-shakeability.yml b/.github/workflows/check-tree-shakeability.yml
deleted file mode 100644
index 68cf86333..000000000
--- a/.github/workflows/check-tree-shakeability.yml
+++ /dev/null
@@ -1,62 +0,0 @@
-name: Check tree-shakeability
-on: [pull_request]
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    concurrency: ci-treeshake-${{ github.ref }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Setup Node.js with Yarn cache
-        uses: actions/setup-node@v4
-        with:
-          node-version: '20'
-          cache: 'yarn'
-
-      - name: Install dependencies
-        run: yarn --frozen-lockfile
-
-      - name: Build artifacts
-        run: yarn build
-
-      - name: Run agadoo
-        id: agadoo
-        run: |
-          # Run Agadoo and store the output for further usage
-          # We store the process stdout and stderr to tmp files
-          STDOUT_F=$(mktemp)
-          STDERR_F=$(mktemp)
-          # Run agadoo and capture errors without breaking the workflow
-          $(npx agadoo 2> $STDERR_F > $STDOUT_F) && true
-
-          # Infer the result from the first word of the last line
-          RET="$(cat $STDERR_F | tail -1 | cut -d' ' -f 1)"
-
-          # In order to be used in GH actions `echo "::set-output` the
-          # multi-line output must be escaped.
-          STDOUT="$(cat $STDOUT_F)"
-          STDOUT="${STDOUT//'%'/%25}"
-          STDOUT="${STDOUT//$'\n'/%0A}"
-          STDOUT="${STDOUT//$'\r'/%0D}"
-          STDERR="$(cat $STDERR_F)"
-          STDERR="${STDERR//'%'/%25}"
-          STDERR="${STDERR//$'\n'/%0A}"
-          STDERR="${STDERR//$'\r'/%0D}"
-          echo "::set-output name=stdout::$STDOUT"
-          echo "::set-output name=stderr::$STDERR"
-          if [[ $RET == 'Success!' ]]; then
-            echo "::set-output name=status::tree-shakeable"
-          else
-            echo "::set-output name=status::not tree-shakeable"
-          fi
-          echo "$STDOUT"
-          echo ""
-          echo "$STDERR"
-          # Clean-up
-          rm $STDOUT_F
-          rm $STDERR_F
-          exit 0
-      - name: Fail if cannot tree-shake
-        if: ${{ steps.agadoo.outputs.status == 'not tree-shakeable' }}
-        run: exit 1
diff --git a/package.json b/package.json
index c57f6dfb8..1b33395ed 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,13 @@
       "main": "./dist/index.cjs"
     }
   },
-  "sideEffects": false,
+  "sideEffects": [
+    "dist/track-focus.js",
+    "src/track-focus.js",
+    "dist/index.ts",
+    "dist/index.js",
+    "src/index.ts"
+  ],
   "files": [
     "dist",
     "src"
diff --git a/src/index.ts b/src/index.ts
index 01e55a7d8..6f429ee77 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -299,52 +299,4 @@ export type {
   UncontrolledTooltipProps
 } from 'reactstrap';
 
-// Focus Management
-
-/**
- * --------------------------------------------------------------------------
- * Bootstrap Italia (https://italia.github.io/bootstrap-italia/)
- * Authors: https://github.com/italia/bootstrap-italia/blob/main/AUTHORS
- * Licensed under BSD-3-Clause license (https://github.com/italia/bootstrap-italia/blob/main/LICENSE)
- * --------------------------------------------------------------------------
- */
-
-// const DATA_MOUSE_FOCUS = 'data-focus-mouse'
-// const CLASS_NAME_MOUSE_FOCUS = 'focus--mouse'
-
-// class TrackFocus {
-//   private _usingMouse: boolean;
-//   constructor() {
-//     this._usingMouse = false
-
-//     this._bindEvents()
-//   }
-
-//   _bindEvents() {
-//     if (typeof document === 'undefined') {
-//       return
-//     }
-//     const events = ['keydown', 'mousedown']
-//     events.forEach((evtName) => {
-//       document.addEventListener(evtName, (evt) => {
-//         this._usingMouse = evt.type === 'mousedown'
-//       })
-//     })
-//     document.addEventListener('focusin', (evt: Event) => {
-//       if (this._usingMouse) {
-//         if (evt.target) {
-//           (evt.target as HTMLElement).classList.add(CLASS_NAME_MOUSE_FOCUS);
-//           (evt.target as HTMLElement).setAttribute(DATA_MOUSE_FOCUS, 'true')
-//         }
-//       }
-//     })
-//     document.addEventListener('focusout', (evt: Event) => {
-//       if (evt.target) {
-//         (evt.target as HTMLElement).classList.remove(CLASS_NAME_MOUSE_FOCUS);
-//         (evt.target as HTMLElement).setAttribute(DATA_MOUSE_FOCUS, 'false')
-//       }
-//     })
-//   }
-// }
-
-// new TrackFocus()
+import "./track-focus.js"
\ No newline at end of file
diff --git a/src/track-focus.js b/src/track-focus.js
new file mode 100644
index 000000000..7883aefb6
--- /dev/null
+++ b/src/track-focus.js
@@ -0,0 +1,49 @@
+
+// Focus Management
+
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap Italia (https://italia.github.io/bootstrap-italia/)
+ * Authors: https://github.com/italia/bootstrap-italia/blob/main/AUTHORS
+ * Licensed under BSD-3-Clause license (https://github.com/italia/bootstrap-italia/blob/main/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+const DATA_MOUSE_FOCUS = 'data-focus-mouse'
+const CLASS_NAME_MOUSE_FOCUS = 'focus--mouse'
+
+class TrackFocus {
+  constructor() {
+    this._usingMouse = false
+
+    this._bindEvents()
+  }
+
+  _bindEvents() {
+    if (typeof document === 'undefined') {
+      return
+    }
+    const events = ['keydown', 'mousedown']
+    events.forEach((evtName) => {
+      document.addEventListener(evtName, (evt) => {
+        this._usingMouse = evt.type === 'mousedown'
+      })
+    })
+    document.addEventListener('focusin', (evt) => {
+      if (this._usingMouse) {
+        if (evt.target) {
+          evt.target.classList.add(CLASS_NAME_MOUSE_FOCUS);
+          evt.target.setAttribute(DATA_MOUSE_FOCUS, 'true')
+        }
+      }
+    })
+    document.addEventListener('focusout', (evt) => {
+      if (evt.target) {
+        evt.target.classList.remove(CLASS_NAME_MOUSE_FOCUS);
+        evt.target.setAttribute(DATA_MOUSE_FOCUS, 'false')
+      }
+    })
+  }
+}
+
+new TrackFocus()
\ No newline at end of file
diff --git a/tsup.config.ts b/tsup.config.ts
index 6c50f6cea..b40d7de49 100644
--- a/tsup.config.ts
+++ b/tsup.config.ts
@@ -1,7 +1,7 @@
 import { defineConfig } from 'tsup';
 
 export default defineConfig({
-  entry: ['src/**/*.@(ts|tsx)'],
+  entry: ['src/**/*.@(js|ts|tsx)'],
   format: ['cjs', 'esm'],
   target: 'esnext',
   dts: false,