October 1998
Intermediate to advanced
95 pages
4h 36m
English
Content preview from JavaScript Pocket Reference
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JavaScript Pocket Reference
Sending email and posting news
Scripts cannot submit forms to
mailto:ornews: URLs
without user confirmation.
Closing windows
A script can only close browser windows that it created
itself, unless it gets user confirmation.
Snooping in the cache
A script cannot load any
about: URLs, such as about:
cache
.
Hidden windows and window decorations
A script cannot create small or offscreen windows or
windows without a titlebar.
Note that this list of security restrictions is not static. As the
use of JavaScript has grown, advertisers and unsavory char-
acters have started doing annoying things with it. As a result,
newer browsers, such as Mozilla 1.0, allow user-config-
urable security restrictions that can prevent scripts from
opening new windows (such as pop-up ads), or from moving
or resizing existing windows.
JavaScript API Reference
The rest of this book contains a quick-reference for the core
and client-side JavaScript APIs. It documents the complete
core JavaScript API, covers the legacy (Level 0) DOM API,
and presents a simplified view of the W3C Level 2 DOM
API. Portions of that API not relevant to JavaScript program-
mers working with HTML documents have been omitted.
The upper-right corner of the title block for each reference
entry contains information that states whether a feature is
part of the core or client-side API, and further indicates
which version of JavaScript,
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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.