tags:

views:

126

answers:

1
Q: 

navigator.onLine still true when turning off WiFi, false when set "work offline" in browser

navigator.onLine is still returning true when I turn off Wi-Fi (Airport on my notebook in OS X). This is counterintuitive behavior. But when I set "work offline" in a browser like Firefox, it correctly returns false. Is this expected?

alert(navigator.onLine ? "online" : "offline");
A: 

Yes. The browser doesn't provide network connectivity information to the page, but rather uses Work Offline's status as the value.

Delan Azabani  2010-05-06 07:53:02
It seems odd because if I turn off Wi-Fi and cellular data by turning on airplane mode on an iPhone, and then return to that page without reloading, it returns true as offline (which is correct).
chimerical  2010-05-06 16:10:33
Browsers may want to detect if network connectivity is down *and then* set the Work Offline variable to `false`. However, the user may always change this variable herself.
Delan Azabani  2010-05-08 00:27:54

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