diff --git a/README.md b/README.md
index 6bd0e10..5acd6b9 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,14 @@ A checklist to make sure you website will be fast!
* Universal selectors like `*, [disabled], [type=“text”]`, etc. are very expensive for the browser to match, as every element in the DOM must be checked.
* Avoid deeply nested dependent selectors
* The descendant selector is very costly, as the browser must check for a match with every descendant element. On a complex web page, this can result in thousands and thousands (perhaps even more) of descendant selector searches.
+* Use media queries to load files based on use case
+
+```css
+
+
+
+
+```
## JS