diff --git a/README.md b/README.md
index 6da6c51e2..0e282b6bf 100644
--- a/README.md
+++ b/README.md
@@ -1862,8 +1862,9 @@ A hover effect where the gradient follows the mouse cursor.
 ```js
 var btn = document.querySelector('.mouse-cursor-gradient-tracking')
 btn.onmousemove = function(e) {
-  var x = e.pageX - btn.offsetLeft - btn.offsetParent.offsetLeft
-  var y = e.pageY - btn.offsetTop - btn.offsetParent.offsetTop
+  var rect = e.target.getBoundingClientRect()
+  var x = e.clientX - rect.left
+  var y = e.clientY - rect.top
   btn.style.setProperty('--x', x + 'px')
   btn.style.setProperty('--y', y + 'px')
 }