prevent the heatmap from being selected (thanks jmjl)

1 files changed, 1 insertions, 0 deletions

diff --git a/index.css b/index.css
index 26caf2f..c35dde2 100644
--- a/index.css
+++ b/index.css
@@ -44,6 +44,7 @@ main {
 #heatmap {
 	width: 100%;
 	height: 0;
+	user-select: none;
 }
 
 #heatmap a {