Check #Online/#Offline #Status #javascript

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Online status checking is an important feature for some browser-based word #editor applications.
They will temporally store the user's operations locally when the #network goes offline.
Do you know how these websites detect your #online or #offline #status?

We can read the online status from the "navigator.onLine" property.
It returns a boolean value.

JavaScript also provides 2 events ("online" and "offline") to listen to the online status change.
You can follow the demo code to implement the feature.

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