update document

Author: dev-javascript

README.md

@@ -4,6 +4,10 @@ React Custom Search List is a powerful and flexible search input component for R
 
 Whether you want to showcase a constant list of options or dynamically adapt to user inputs, React Custom Search List offers the versatility you need to deliver an engaging search experience.
 
+## Demo
+
+- [Online Demo](https://dev-javascript.github.io/react-custom-search-list/)
+
 ## Features
 
 - Custom suggestions list