July 1998
Intermediate to advanced
1456 pages
65h 5m
English
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Name
userAgent — NN 2 IE 3 DOM n/a
Synopsis
Read-only
Information about the browser software, including version, operating
system platform, and brand. This is the most complete set of
information about the browser, whereas appVersion
and appName properties provide subset data.
Typical data for this property looks like the following:
Mozilla/4.0 (compatible; MSIE 4.01; Windows 95)
Do not rely on the length or position of any part of this data, as it
may vary with browser, version, and proxy server used at the client
end. Instead, use the indexOf( ) method to check
for the presence of a desired string.
Example
if (navigator.userAgent.indexOf("MSIE") != -1) {
var isIE = true
}Value
String.
Default
Depends on browser.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.