diff --git a/chapters/introduction.mdx b/chapters/introduction.mdx
index de27a8b..ec3b8a8 100644
--- a/chapters/introduction.mdx
+++ b/chapters/introduction.mdx
@@ -23,4 +23,4 @@ Simultaneously, regular expressions are ill-suited for other kinds of problems:
 
 There are several regex implementations—regex engines—each with its own quirks and features. This book will avoid going into the differences between these, instead sticking to features that are, for the most part, common across engines.
 
-The example blocks that feature throughout the book are rendered using JavaScript.
+The example blocks throughout the book use JavaScript under the hood. As a result, the book may be slightly biased towards JavaScript's regex engine.