What is the DOM and how is it manipulated with JavaScript?

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The DOM (Document Object Model) is a programming interface that represents the structure of a web page as a tree of objects. Each element, attribute, and piece of text is a node in this tree. The DOM allows JavaScript to dynamically access and modify the content, structure, and style of a website.

How JavaScript Manipulates the DOM:

1. Accessing Elements:
   JavaScript uses methods like:

• getElementById()

• getElementsByClassName()

• getElementsByTagName()

• querySelector() / querySelectorAll()

2. Changing Content:
   Modify text or HTML using:

   • textContent for plain text

   • innerHTML for HTML content

3. Changing Attributes and Styles:

   • Use .setAttribute() or .style to change an element’s attributes or CSS.

4. Creating and Removing Elements:

   • createElement(), appendChild(), removeChild(), and similar methods let you build or delete nodes.

5. Event Handling:
   Add interactivity using addEventListener().

Through these techniques, JavaScript brings static HTML pages to life with dynamic behavior and real-time updates.

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