Document Object Model (DOM):
- A programming interface that represents HTML or XML documents as a tree structure, allowing programs to manipulate the document's structure, style, and content.
Node:
- The basic unit of the DOM tree, representing elements, text, comments, and other parts of the document.
Parent Node:
- A node that has one or more child nodes. In the DOM tree, it is directly above its children.
Child Node:
- A node that is directly descended from a parent node in the DOM tree.
Sibling Node:
- Nodes that share the same parent node. They are at the same hierarchical level in the DOM tree.
Element Node:
- A node representing an HTML or XML element, such as <div>, <p>, or <li>.
Text Node:
- A node representing the text content within an element.
Traversal:
- The process of navigating through the DOM tree to access different nodes, such as moving from a parent to a child or between siblings.

Early JavaScript Development (1995):
- The DOM was introduced to provide a standardized way for JavaScript to interact with web page elements, enabling dynamic content manipulation.
DOM Level 1 to 3:
- Over the years, the DOM specification evolved through various levels, introducing more features and standardizing APIs for consistency across browsers.
Modern DOM (DOM Living Standard):
- Continues to evolve with the introduction of new methods and properties, ensuring that JavaScript remains a powerful tool for web development.

First-Class Interaction:
- The DOM allows JavaScript to interact with the web page in real-time, enabling features like live content updates, interactive forms, and dynamic styling.
Browser Variations:
- Early implementations of the DOM varied between browsers, leading to compatibility issues that were later resolved through standardization efforts.
Event-Driven:
- The DOM is inherently event-driven, allowing JavaScript to respond to user actions such as clicks, keyboard input, and mouse movements.
Manipulation Beyond Content:
- The DOM not only allows for content manipulation but also for structural changes, such as adding or removing elements, and altering styles dynamically.
Accessibility Integration:
- Proper DOM manipulation plays a crucial role in web accessibility, ensuring that dynamic content is accessible to all users, including those using assistive technologies.

Day 21 -Understanding the Document Object Model (DOM)