diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..b15f9b0
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,38 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:prettier/recommended',
+  ],
+  plugins: ['prettier'],
+  env: {
+    node: true,
+    browser: true,
+    worker: true,
+    es2022: true,
+  },
+  rules: {
+    'prettier/prettier': 'error',
+    'no-unused-vars': 'off',
+    '@typescript-eslint/no-unused-vars': [
+      'error',
+      { ignoreRestSiblings: true, argsIgnorePattern: '^_' },
+    ],
+  },
+  overrides: [
+    {
+      files: ['*d.ts'],
+      rules: {
+        'no-undef': 'off',
+      },
+    },
+    {
+      files: ['*js'],
+      globals: {
+        webcm: 'writable',
+      },
+    },
+  ],
+}
+
diff --git a/src/track.ts b/src/track.ts
index 3c86f92..2956e6b 100644
--- a/src/track.ts
+++ b/src/track.ts
@@ -3,7 +3,7 @@ import { ComponentSettings, MCEvent } from '@managed-components/types'
 const USER_DATA: Record<string, { hashed?: boolean }> = {
   email: { hashed: true },
   phone_number: { hashed: true },
-  external_id: { hashed: true }
+  external_id: { hashed: true },
 }
 
 const getTtclid = (event: MCEvent) => {