August 2016
Beginner to intermediate
847 pages
17h 28m
English
Content preview from JavaScript : Object-Oriented ProgrammingBecome 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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BOM and DOM – an overview
The JavaScript code in a page has access to a number of objects. These objects can be divided into the following types:
- Core ECMAScript objects: All the objects mentioned in the previous chapters
- DOM: Objects that have to do with the currently loaded page (the page is also called the document)
- BOM: Objects that deal with everything outside the page (the browser window and the desktop screen)
DOM stands for Document Object Model and BOM for Browser Object Model.
The DOM is a standard, governed by the World Wide Web Consortium (W3C) and has different versions, called levels, such as DOM Level 1, DOM Level 2, and so on. Browsers in use today have different degrees of compliance with the standard but in general, they almost all ...
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