diff --git a/src/js/index.js b/src/js/index.js
index 59c5909..71df099 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -1,5 +1,9 @@
 (function() {
 	window.addEventListener('DOMContentLoaded', event => {
+		if (!!window.IntersectionObserver) {
+			document.body.classList.add('supports-intersect');
+		}
+
 		function onScreenHandler(entries) {
 			entries.forEach(entry => {
 				if (entry.intersectionRatio > 0) {