• A window object exists for each open browser window. • The properties of this object describe the document in the window and provide information about the window.

With HTML5, the Window object in the specification incorporates the de facto functionality and a few enhancements. Implementation of this object is mixed; different browsers have different …

The window object the entire browser window; the top-level object in DOM hierarchy technically, all global code and variables become part of the window object properties: document, history, …

BOM: Browser Object Model • BOM – collection of objects that the browser makes available to us for use with JavaScript window Object location Object history Object

“The Document Object Model is a platform- and language-neutral interface that will allow programs and scripts to dynamically access and update the content, structure and style of …

The Document Object Model (DOM) JavaScript can query or modify the HTML document Accessible via the JavaScript global scope, aliases: window this

To use another analogy, a Book object can contain (aggregate) one or more Author objects, a Publisher object, several Chapter objects, a TOC (table of contents), and so on.