diff --git a/.eslintignore b/.eslintignore
index c6b045a5633..c3af857904e 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,3 +1 @@
-lib/definitions.js
-lib/version.js
-lib/helpers.js
+lib/
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 82d98cb185e..8919b79f3a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,6 +17,7 @@ jobs:
           node-version: '16'
           cache: 'npm'
       - run: npm ci
+      - run: npm run build
       - run: npm run test
   lint:
     runs-on: ubuntu-latest
@@ -28,4 +29,5 @@ jobs:
           node-version: '16'
           cache: 'npm'
       - run: npm ci
+      - run: npm run build
       - run: npm run lint
diff --git a/.prettierignore b/.prettierignore
index a731c5df3a2..4b4e10e26cd 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -2,5 +2,6 @@ coverage/
 dist/
 doc/
 examples/browser/js/
+lib/
 CHANGELOG.md
 package-lock.json
diff --git a/package.json b/package.json
index 94e53304c15..1d3bc0fc295 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
   "scripts": {
     "browser": "gulp browser",
     "jsdoc": "gulp jsdoc",
+    "build": "tsc",
     "format": "prettier --write .",
     "lint": "echo 'TODO eslint'",
     "test": "mocha test/*.*.js",
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000000..b50049a9be6
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "lib",
+    "declaration": true
+  }
+}