October 2023
Intermediate to advanced
1104 pages
28h 11m
English
Content preview from Professional JavaScript for Web Developers, 5th Edition
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13The Document Object Model
The Document Object Model (DOM) is an application programming interface (API) for HTML and XML documents. The DOM represents a document as a hierarchical tree of nodes, allowing developers to add, remove, and modify individual parts of the page. Evolving out of early Dynamic HTML (DHTML) innovations from Netscape and Microsoft, the DOM is now a truly cross-platform, language-independent way of representing and manipulating pages for markup.
DOM Level 1 became a W3C recommendation in October 1998, providing interfaces for basic document structure and querying. This chapter focuses on the features and uses of the DOM as it relates to HTML pages in the browser and the DOM JavaScript API.
HIERARCHY OF NODES
Any HTML or XML document can be represented as a hierarchy of nodes using the DOM. There are several node types, each representing different information and/or markup in the document. Each node type has different characteristics, data, and methods, and each may have relationships with other nodes. These relationships create a hierarchy that allows markup ...
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