diff --git a/example.gitignore b/example.gitignore
index c292c2e927dc912c76fc41ab59a26a43ceba32fa..4fde30a8a1f582679d4da8ceaef5798ed4eb9f65 100644
--- a/example.gitignore
+++ b/example.gitignore
@@ -14,6 +14,10 @@
 # Core's dependencies are managed with Composer.
 vendor
 
+# Ignore node_modules folder created when installing core's JavaScript
+# dependencies.
+core/node_modules
+
 # Ignore configuration files that may contain sensitive information.
 sites/*/settings*.php
 sites/*/services*.yml