Update online-offline-events.md

diff --git a/docs/tutorial/online-offline-events.md b/docs/tutorial/online-offline-events.md
index f89e7fa..3145467 100644 (file)
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+++ b/docs/tutorial/online-offline-events.md
@@ -78,3 +78,4 @@ _online-status.html_
 </body>
 </html>
 ```
+In Chrome and Safari, if the browser is not able to connect to a local area network (LAN) or a router, it is offline; all other conditions return true. So while you can assume that the browser is offline when it returns a false value, you cannot assume that a true value necessarily means that the browser can access the internet. You could be getting false positives, such as in cases where the computer is running a virtualization software that has virtual ethernet adapters that are always "connected." Therefore, if you really want to determine the online status of the browser, you should develop additional means for checking.