How do I detect to whether the browser is online or offline

Learn how to detect whether the browser is online or offline with JavaScript.

Read on how to do it in this tutorial: https://www.w3schools.com/howto/howto_js_offline_detection.asp

Offline Detection

The onLine property of the Navigator object returns a Boolean value that specifies whether the browser is in online or offline mode.

Try it yourself here: https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_offline_detection

Read more about the Navigator Object in our JavaScript Navigator Tutorial.