July 2013
Intermediate to advanced
382 pages
6h 56m
English
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Chapter 7. The Browser Environment
You know that JavaScript programs need a host environment. Most of what you learned so far in this book was related to core ECMAScript/JavaScript and can be used in many different host environments. Now, let's shift the focus to the browser, since this is the most popular and natural host environment for JavaScript programs. In this chapter, you will learn about the following elements:
- The Browser Object Model (BOM)
- The Document Object Model (DOM)
- Browser events
- The
XMLHttpRequestobject
Including JavaScript in an HTML page
To include JavaScript in an HTML page, you need to use the <script> tag as follows:
<!DOCTYPE>
<html>
<head>
<title>JS test</title>
<script src="somefile.js"></script>
</head>
<body>
<script>Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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.
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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.