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Navigator onLine Property

< Navigator Object

Example

Find out whether the browser is online:

var x = "Is the browser online? " + navigator.onLine;

The result of x will be:

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More "Try it Yourself" examples below.

Definition and Usage

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

Note: This property is read-only.

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

Property
onLine 14.0 Yes 3.5 5.0.4 Yes

Syntax

navigator.onLine

Technical Details

Return Value: A Boolean, indicating whether the browser is in online or offline mode.

Returns true if the browser is online, otherwise it returns false
Examples

More Examples

Example

A demonstration of all navigator properties in one example:

var txt = "";
txt += "<p>Browser CodeName: " + navigator.appCodeName + "</p>";
txt += "<p>Browser Name: " + navigator.appName + "</p>";
txt += "<p>Browser Version: " + navigator.appVersion + "</p>";
txt += "<p>Cookies Enabled: " + navigator.cookieEnabled + "</p>";
txt += "<p>Browser Language: " + navigator.language + "</p>";
txt += "<p>Browser Online: " + navigator.onLine + "</p>";
txt += "<p>Platform: " + navigator.platform + "</p>";
txt += "<p>User-agent header: " + navigator.userAgent + "</p>";
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< Navigator Object