Window navigator.onLine

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Example

Is the browser online?

let online = navigator.onLine;

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More "Try it Yourself" examples below.

Description

The onLine property returns true if the browser is online, otherwise false.

The onLine property is read-only.

Note

This property is unreliable.
A computer can be connected to a network without having Internet access.

Syntax

navigator.onLine

Return Value

Type	Description
A boolean	`true` if the browser is in online, otherwise `false`.

More Examples

Display all navigator properties:

let text = "Browser CodeName: " + navigator.appCodeName + "" +
"Browser Name: " + navigator.appName + "" +
"Browser Version: " + navigator.appVersion + "" +
"Cookies Enabled: " + navigator.cookieEnabled + "" +
"Browser Language: " + navigator.language + "" +
"Browser Online: " + navigator.onLine + "" +
"Platform: " + navigator.platform + "" +
"User-agent header: " + navigator.userAgent + "";

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Browser Support

navigator.onLine is supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes

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