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JS Versions

JS Versions JS 2009 (ES5) JS 2015 (ES6) JS 2016 JS 2017 JS 2018 JS IE / Edge JS History

JS Objects

Object Definitions Object Properties Object Methods Object Display Object Accessors Object Constructors Object Prototypes Object Iterables Object Sets Object Maps Object Reference

JS Functions

Function Definitions Function Parameters Function Invocation Function Call Function Apply Function Closures

JS Classes

Class Intro Class Inheritance Class Static

JS Async

JS Callbacks JS Asynchronous JS Promises JS Async/Await

JS HTML DOM

DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM Forms DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists

JS Browser BOM

JS Window JS Screen JS Location JS History JS Navigator JS Popup Alert JS Timing JS Cookies

JS Web APIs

Web API Intro Web Forms API Web History API Web Storage API Web Worker API Web Fetch API Web Geolocation API

JS AJAX

AJAX Intro AJAX XMLHttp AJAX Request AJAX Response AJAX XML File AJAX PHP AJAX ASP AJAX Database AJAX Applications AJAX Examples

JS JSON

JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON Server JSON PHP JSON HTML JSON JSONP

JS vs jQuery

jQuery Selectors jQuery HTML jQuery CSS jQuery DOM

JS Graphics

JS Graphics JS Canvas JS Plotly JS Chart.js JS Google Chart JS D3.js

JS Examples

JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Editor JS Exercises JS Quiz JS Certificate

JS References

JavaScript Objects HTML DOM Objects

JavaScript. W3Schools in English. Lessons for beginners

Ru Ua

JavaScript Window Navigator


The window.navigator object contains information about the visitor's browser.


Window Navigator

The window.navigator object can be written without the window prefix.

Some examples:

  • navigator.appName
  • navigator.appCodeName
  • navigator.platform

Browser Cookies

The cookieEnabled property returns true if cookies are enabled, otherwise false:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML =
"cookiesEnabled is " + navigator.cookieEnabled;
</script>
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Browser Application Name

The appName property returns the application name of the browser:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML =
"navigator.appName is " + navigator.appName;
</script>
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Strange enough, "Netscape" is the application name for both IE11, Chrome, Firefox, and Safari.


Browser Application Code Name

The appCodeName property returns the application code name of the browser:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML =
"navigator.appCodeName is " + navigator.appCodeName;
</script>
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"Mozilla" is the application code name for both Chrome, Firefox, IE, Safari, and Opera.


The Browser Engine

The product property returns the product name of the browser engine:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML =
"navigator.product is " + navigator.product;
</script>
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Do not rely on this. Most browsers returns "Gecko" as product name!!


The Browser Version

The appVersion property returns version information about the browser:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = navigator.appVersion;
</script>
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The Browser Agent

The userAgent property returns the user-agent header sent by the browser to the server:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = navigator.userAgent;
</script>
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Warning !!!

The information from the navigator object can often be misleading, and should not be used to detect browser versions because:

  • Different browsers can use the same name
  • The navigator data can be changed by the browser owner
  • Some browsers misidentify themselves to bypass site tests
  • Browsers cannot report new operating systems, released later than the browser

The Browser Platform

The platform property returns the browser platform (operating system):

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = navigator.platform;
</script>
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The Browser Language

The language property returns the browser's language:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = navigator.language;
</script>
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Is The Browser Online?

The onLine property returns true if the browser is online:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = navigator.onLine;
</script>
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Is Java Enabled?

The javaEnabled() method returns true if Java is enabled:

Example

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML = navigator.javaEnabled();
</script>
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