Document Object Model

The Document Object Model (DOM) is a programming interface that represents documents as trees of objects and exposes their structure and content to scripts and tools.

DOM tree: A hierarchical representation of a document in which nodes represent elements, text, and other content. The DOM organizes document content into this tree structure.
HTML: A markup language for structuring content on the web. Browsers commonly build DOM trees from HTML documents.
DOM manipulation: The programmatic creation, removal, or modification of document nodes. It is the direct way scripts update page content and structure.
HTML source code: The textual markup supplied for an HTML document before or apart from browser processing. The DOM is a parsed object structure, not simply the original source text.
DOM node: An object in a document tree, such as an element, text, comment, or document node. Scripts inspect and modify documents through their nodes.
XML: A markup language that defines rules for encoding structured documents. The DOM also represents XML documents as node trees.
Event-driven programming: A programming approach in which code responds to events such as clicks or messages. Browser code often uses DOM events to trigger interface behavior.
Visual formatting model: The rules by which a browser lays out boxes and positions rendered content. The DOM tree is distinct from the layout structures used to render a page.
DOM API: The programming interface for accessing and manipulating document objects. Its methods and properties expose the tree to code.
JavaScript: A programming language widely used to add behavior to web pages. JavaScript commonly reads and changes browser DOM objects.

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