diff --git a/.gitignore b/.gitignore
index 48a9b0a12..3c5cf98ee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,7 @@ tmp/
 sample/ckeditor.dist.js
 package-lock.json
 yarn-error.log
+
+# Ignore compiled TypeScript files.
+src/**/*.js
+src/**/*.d.ts