Understanding the DOM Data Structure
The DOM represents an HTML document as a hierarchical tree-like structure. Each element in the document, such as paragraphs, headings, images, and links, is represented by a node in the tree. These nodes can have parent-child relationships with each other.
Nodes and Elements
getElementById(), which allows you to retrieve an element by its unique identifier.
textContent property or modify its attributes using methods like
Navigating the DOM Tree
Traversal of the DOM tree is another important aspect of working with the DOM data structure. We can move from one node to another within the tree using properties like
previousSibling. This allows us to navigate through sibling nodes or move up and down the hierarchy.
CSS Selectors for Element Selection
Besides using methods like
getElementById(), we can also select elements using CSS selectors. The DOM API provides the
querySelectorAll() methods, which allow us to select elements based on their tag names, classes, or other attributes.
Creating and Modifying Elements
In addition to manipulating existing elements on a web page, we can also create new elements dynamically. The DOM API provides methods like
createElement(), which allows us to create new element nodes. We can then append these new elements to existing nodes using methods like
The Power of the DOM Data Structure