1 files changed, 2 insertions, 1 deletions
diff --git a/track.js b/track.js
index cb8ab72..9447b78 100644
--- a/track.js
+++ b/track.js
@@ -13,6 +13,7 @@
 	}, false)
 	window.addEventListener("beforeunload", ()=>{
 		let xhr = new XMLHttpRequest()
+		startedAt = startedAt || new Date()
 		xhr.open("POST", "https://stats.ignore.pl/entry")
 		xhr.setRequestHeader("Content-Type", "application/json")
 		xhr.send(JSON.stringify({
@@ -20,7 +21,7 @@
 			"referrer": document.referrer,
 			"startedAt": startedAt,
 			"timeSpent": Math.floor((new Date() - startedAt) / 1000),
-			"scrolledTo": scrolledTo / document.scrollingElement.scrollHeight
+			"scrolledTo": (scrolledTo || 0) / document.scrollingElement.scrollHeight
 		}))
 	})
 })()