Returns either "
4.0" or a string representing version information about
4.0" or a string representing version information about the
alert('Your browser version is reported as ' + navigator.appVersion);
window.navigator.userAgent property may also contain the version
number (for example
Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.2) Gecko/20010725 Netscape 6/6.1"),
but you should be aware of how easy it is to change the user agent string and "spoof"
other browsers, platforms, or user agents, and also how cavalier the browser vendor
themselves are with these properties.
window.navigator.userAgent properties have been used in "browser sniffing"
code: scripts that attempt to find out what kind of browser you are using and adjust
pages accordingly. This lead to the current situation, where browsers had to return fake
values from these properties in order not to be locked out of some websites.
|HTML Living Standard
The definition of 'NavigatorID.appVersion' in that specification.
|Living Standard||Initial definition|
BCD tables only load in the browser