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JS Forms

JS Forms Forms API

JS Objects

Object Definitions Object Properties Object Methods Object Prototypes

JS Functions

Function Definitions Function Parameters Function Invocation Function Closures

JS HTML DOM

DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM CSS DOM Animations DOM Events DOM EventListener DOM Navigation DOM Nodes DOM Nodelist

JS Browser BOM

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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 Objects JSON Arrays JSON Parse JSON Stringify JSON PHP JSON HTML JSON JSONP

JS Examples

JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser

JS References

JavaScript Objects HTML DOM Objects


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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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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