Don't generate snow if tab is inactive

1 files changed, 7 insertions, 3 deletions

diff --git a/content/script.js b/content/script.js
index dd7729d..763734e 100644
--- a/content/script.js
+++ b/content/script.js
@@ -1,4 +1,10 @@
 function createSnowFlake() {
+    setTimeout(() => createSnowFlake(), 50 / Math.log10(window.innerWidth / 1000 + 1));
+
+    if (document.hidden) {
+        return;
+    }
+
         const snowFlake = document.createElementNS("http://www.w3.org/2000/svg", "svg");
     const snowFlakeInner = document.createElementNS("http://www.w3.org/2000/svg", "use");
 
@@ -11,13 +17,11 @@ function createSnowFlake() {
         snowFlake.style.left = Math.random() * 100 + '%';
         snowFlake.style.animationDuration = (Math.random() * 3 + 2) * 1000 + 'ms';
         snowFlake.style.opacity = Math.random();
-    
+
     snowFlake.addEventListener("animationend", () => snowFlake.remove());
 
     snowFlake.appendChild(snowFlakeInner);
         document.body.appendChild(snowFlake);
-
-    setTimeout(() => createSnowFlake(), 50 / Math.log10(window.innerWidth / 1000 + 1));
 }
 
 createSnowFlake();