Why is DOM Required?
HTML is used to structure the web pages and Javascript is used to add behavior to our web pages. When an HTML file is loaded into the browser, the JavaScript can not understand the HTML document directly. So it interprets and interacts with the Document Object Model (DOM), which is created by the browser based on the HTML document.
DOM is basically the representation of the same HTML document but in a tree-like structure composed of objects. JavaScript can not understand the tags(<h1>H</h1>) in HTML document but can understand object h1 in DOM.
JavaScript interprets DOM easily, using it as a bridge to access and manipulate the elements. DOM Javascript allow access to each of the objects (h1, p, etc) by using different functions.
The Document Object Model (DOM) is essential in web development for several reasons:
- Dynamic Web Pages: It allows you to create dynamic web pages. It enables the JavaScript to access and manipulate page content, structure, and style dynamically which gives interactive and responsive web experiences, such as updating content without reloading the entire page or responding to user actions instantly.
- Interactivity: With the DOM, you can respond to user actions (like clicks, inputs, or scrolls) and modify the web page accordingly.
- Content Updates: When you want to update the content without refreshing the entire page, the DOM enables targeted changes making the web applications more efficient and user-friendly.
- Cross-Browser Compatibility: Different browsers may render HTML and CSS in different ways. The DOM provides a standardized way to interact with page elements.
- Single-Page Applications (SPAs): Applications built with frameworks such as React or Angular, heavily rely on the DOM for efficient rendering and updating of content within a single HTML page without reloading the full page.
HTML DOM (Document Object Model)
HTML DOM (Document Object Model) is a hierarchical representation of HTML documents. It defines the structure and properties of elements on a webpage, enabling JavaScript to dynamically access, manipulate, and update content, enhancing interactivity and functionality.
Note: It is called a Logical structure because DOM doesn’t specify any relationship between objects.
Table of Content
- Why DOM is required?
- Structure of DOM
- Properties of DOM
- Methods of Document Object Model
- What DOM is not?
- Levels of DOM: