Returns the build identifier of the browser. In modern browsers this property now returns a fixed timestamp as a privacy measure, e.g. 20181001000000 in Firefox 64 onwards.

Syntax

buildID = navigator.buildID;

Value

A string representing the build identifier of the application. The build ID is in the form YYYYMMDDHHMMSS.

Example

console.log(window.navigator.buildID);

Specification

Not part of any public standard.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Non-standard
Chrome ? Edge ? Firefox Full support 64
Notes
Full support 64
Notes
Notes Returns a fixed timestamp as a privacy measure — 20181001000000.
Full support 2
IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support 64
Notes
Full support 64
Notes
Notes Returns a fixed timestamp as a privacy measure — 20181001000000.
Full support Yes
Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
See implementation notes.
See implementation notes.

See also

Document Tags and Contributors

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Last updated by: chrisdavidmills,