diff --git a/example.gitignore b/example.gitignore
index d1e35ac0031..7cc32279748 100644
--- a/example.gitignore
+++ b/example.gitignore
@@ -11,8 +11,11 @@
 # including Drupal core.
 # core
 
-# Core's dependencies are managed with Composer.
-vendor
+# Ignore dependencies that are managed with Composer.
+# Generally you should only ignore the root vendor directory. It's important
+# that core/assets/vendor and any other vendor directories within contrib or
+# custom module, theme, etc., are not ignored unless you purposely do so.
+/vendor/
 
 # Ignore configuration files that may contain sensitive information.
 sites/*/settings*.php