September 2001
Intermediate to advanced
640 pages
31h 42m
English
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Chapter 28. Introduction to JavaScript
JavaScript is a client-side scripting language that adds interactivity to web pages and lets designers control various aspects of the browser itself. With JavaScript, you can do such things as display additional information about links, create mouse rollover effects, change the contents of pages based on certain conditions, randomly display content on a page, load content in new browser windows and frames, and (with some help from CSS) move elements around on the page.
A scripting language is somewhere between a markup language, like HTML, and a full-blown programming language, like Java. With JavaScript, you can add extra functionality to your web site using short snippets of scripting code that has a syntax that’s fairly easy to understand.
This chapter includes material and code by Nick Heinle and Bill Peña, authors of Designing with JavaScript (O’Reilly). For a more advanced JavaScript reference, see JavaScript: The Definitive Guide by David Flanagan (O’Reilly). Also note that for simple functionality, you may not need to write your own JavaScript at all; software like Macromedia’s Dreamweaver can do the coding for you, with built-in behaviors you can drop in like HTML objects. But as with HTML, if you are going to use JavaScript, you should be familiar with the basics of the language, whether you are using a WYSIWYG editor or not.
JavaScript History
JavaScript was first introduced by Netscape in Navigator 2.0, as a simple scripting language ...
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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.