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The JavaScript navigator object is used for browser detection.
It can be used to retrieve various bits of browser information such as appName, appVersion, userAgent, langauge and more
The navigator object is the window property, so it can be accessed by:
window.navigator or navigator
Properties and Methods
| Property / Method | Description |
|---|---|
| activeVrDisplays | Returns an array of every VRDisplay instance with its presenting property set to true |
| appCodeName | This returns “Mozilla” even in non-Mozilla browsers. |
| appName | Returns the full browser name. |
| appVersion | Returns the browser version. This may not correspond to the actual version of the browser. |
| battery | a BatteryManager object to interact with the Battery status API |
| buildId | Returns the build number of the web browser. |
| connection | a NetworkInformation object to interact with the Network information API |
| cookieEnabled | Returns true if cookies are enabled; otherwise returns false. |
| credentials | a CredentialsContainer to interact with the Credentials Management API |
| deviceMemory | Returns the amount of device memory in gigabytes. |
| doNotTrack | Returns the user’s preference of do-not-track . |
| geolocation | a Geolocation object to interact with the Geolocation API. |
| getVRDisplays() | an array of every VRDisplay instance if available. |
| getUserMedia() | Returns the stream associated with the available media device hardware. |
| hardwareConcurrency | Returns the number of processor cores of the device |
| javaEnabled | Is Java enabled in the browser. |
| language | Browser’s primary language. |
| languages | Returns an array of all the browser’s preferred languages. |
| locks | Returns a LockManager object to interact with the Web Locks API. |
| mediaCapabilities | Returns a MediaCapabilities object to interact with the Media capabilities API |
| mediaDevices | Returns the available media devices. |
| maxTouchPoints | Returns the maximum number of supported touch points for the device’s touchscreen |
| mimeTypes | MIME types registered with the browser. |
| onLine | Specifies if the browser is connected to the Internet. |
| oscpu | The operating system and/or CPU on which the browser is running. |
| permissions | Returns the Permissions object to interact with the Permissions API. |
| platform | Returns the system platform on which the browser is running. |
| plugins | Installed browser’s plug-ins. |
| product | Returns the name of the product. |
| productSub | Extra information about the product. |
| registerProtocolHandler() | Registers a website as a handler for a particular protocol. |
| requestMediaKeySystemAccess() | Returns a Promise which resolves to a MediaKeySystemAccess object. |
| sendBeacon() | Asynchronously transmits a small payload. |
| serviceWorker | Returns the ServiceWorkerContainer used to interact with ServiceWorker object |
| share() | Calls the current platform’s native sharing mechanism. |
| storage | Returns the StorageManager object to interact with the Storage API. |
| userAgent | Represents the user-agent string of the browser. |
| vendor | brand name of the browser. |
| vendorSub | Returns extra information about the browser’s vendor. |
| vibrate() | This triggers the device to vibrate if it is supported. |
| webdriver | This returns if the browser is currently controlled by automation. |
Example
<script>
document.writeln("<br/>navigator.appCodeName: "+navigator.appCodeName);
document.writeln("<br/>navigator.appName: "+navigator.appName);
document.writeln("<br/>navigator.appVersion: "+navigator.appVersion);
document.writeln("<br/>navigator.cookieEnabled: "+navigator.cookieEnabled);
document.writeln("<br/>navigator.language: "+navigator.language);
document.writeln("<br/>navigator.userAgent: "+navigator.userAgent);
document.writeln("<br/>navigator.platform: "+navigator.platform);
document.writeln("<br/>navigator.onLine: "+navigator.onLine);
</script>
This displayed the following
navigator.appCodeName: Mozilla
navigator.appName: Netscape
navigator.appVersion: 5.0 (Windows)
navigator.cookieEnabled: true
navigator.language: en-GB
navigator.userAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0
navigator.platform: Win32
navigator.onLine: true