Browser
It is
important to understand the differences between different browsers in order to
handle each in the way it is expected. So it is important to know which browser
your web page is running in.
To get
information about the browser your webpage is currently running in, use the
built-in navigator object.
Navigator
Properties
There are
several Navigator related properties that you can use in your Web page. The
following is a list of the names and descriptions of each.
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S.No
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Property
and Description
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appCodeName
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1
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This
property is a
string that contains
the code name
of the
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browser, Netscape for Netscape and Microsoft
Internet Explorer for
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Internet Explorer.
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appVersion
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2
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This property is a string that contains the
version of the browser as
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well
as other useful
information such as
its language and
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compatibility.
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language
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3
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This property contains the two-letter
abbreviation for the language
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that is used by the browser. Netscape only.
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mimTypes[]
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4
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This property is an array that contains all
MIME types supported by
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the client. Netscape only.
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platform[]
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5
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This property is a string that contains the
platform for which the
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browser
was
compiled."Win32"
for 32-bit Windows
operating
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systems
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plugins[]
6 This property is an array containing all the
plug-ins that have been installed on the client. Netscape only.
userAgent[]
7 This property is a string that contains the
code name and version of the browser. This value is sent to the originating
server to identify the client.
Navigator Methods
There are several Navigator-specific methods.
Here is a list of their names and descriptions.
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S.No
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Method
and Description
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javaEnabled()
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1
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This method determines if JavaScript is
enabled in the client. If
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JavaScript
is enabled, this
method returns true;
otherwise, it
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returns false.
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plugings.refresh
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2
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This
method makes newly
installed plug-ins available
and
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populates the plugins array with all new
plug-in names. Netscape
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only.
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preference(name,value)
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3
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This method allows a signed script to get
and set some Netscape
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preferences. If the second parameter is
omitted, this method will
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return the value of the specified
preference; otherwise, it sets the
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value. Netscape only.
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taintEnabled()
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4 This method returns true if data tainting is enabled; false otherwise.
Browser Detection
There is a simple JavaScript which can be used
to find out the name of a browser and then accordingly an HTML page can be
served to the user.
<html>
<head>
<title>Browser Detection
Example</title>
</head>
<body>
<script
type="text/javascript">
<!--
var userAgent
var opera
var ie
var gecko
var netscape
var version
=
navigator.userAgent;
=
(userAgent.indexOf('Opera') != -1);
=
(userAgent.indexOf('MSIE') != -1);
=
(userAgent.indexOf('Gecko') != -1);
=
(userAgent.indexOf('Mozilla') != -1);
=
navigator.appVersion;
if (opera){
document.write("Opera based
browser");
// Keep your opera specific URL here.
}else if (gecko){
document.write("Mozilla based
browser");
// Keep your gecko specific URL here.
}else if (ie){
document.write("IE based browser");
// Keep your IE specific URL here.
}else if (netscape){
document.write("Netscape based
browser");
// Keep your Netscape specific URL
here. }else{
document.write("Unknown browser");
}
// You can include version to along with any
above condition.
document.write("<br /> Browser
version info : " + version );
//-->
</script>
</body>
</html>
Output
Mozilla based browser
Browser version info : 5.0
(Windows NT 6.3; WOW64)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36
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