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15.5 JS 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.cookieEnabled
- navigator.appCodeName
- navigator.platform

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

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

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

The appName property returns the application name of the browser:

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

<script>
document.getElementById("demo").innerHTML =
"navigator.appName is " + navigator.appName;
</script>

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

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

<script>
document.getElementById("demo").innerHTML =
"navigator.appCodeName is " + navigator.appCodeName;
</script>

Warning
This property is removed (deprecated) in the latest web standard.
Most browsers (IE11, Chrome, Firefox, Safari, Opera) returns Mozilla as appCodeName.

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

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

<script>
document.getElementById("demo").innerHTML =
"navigator.product is " + navigator.product;
</script>

The appVersion property returns version information about the browser:

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

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

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

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

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

The information from the navigator object can often be misleading.
The navigator object 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 platform property returns the browser platform (operating system):

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

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

The language property returns the browser's language:

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

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

The onLine property returns true if the browser is online:

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

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

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

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

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

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