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Chapter 13. JavaScript in Web Browsers > The Web Browser Environment
13.1. The Web Browser Environment
To understand client-side JavaScript, you must understand the programming environment provided by a web browser. The following sections introduce three important features of that programming environment:
The Window object that serves as the global object and global execution context for client-side JavaScript code
The client-side object hierarchy and the Document Object Model that forms a part of it
The event-driven programming model
