Explain the Virtual DOM in React.js.

I-Hub Talent: The Best Full Stack Python Institute in Hyderabad

If you're looking for the best Full Stack Python institute in Hyderabad, I-Hub Talent is your ultimate destination. Known for its industry-focused curriculum, expert trainers, and hands-on projects, I-Hub Talent provides top-notch Full Stack Python training to help students and professionals master Python, Django, Flask, Frontend, Backend, and Database Technologies.

At I-Hub Talent, you will gain practical experience in HTML, CSS, JavaScript, React, SQL, NoSQL, REST APIs, and Cloud Deployment, making you job-ready. The institute offers real-time projects, career mentorship, and placement assistance, ensuring a smooth transition into the IT industry.

Join I-Hub Talent’s Full Stack Python course in Hyderabad and boost your career with the latest Python technologies, web development, and software engineering skills. Elevate your potential and land your dream job with expert guidance and hands-on training!

The Virtual DOM in React.js is a lightweight, in-memory representation of the real DOM (Document Object Model). It’s a key concept that enables React to efficiently update the user interface.

When you build a React app, your UI is described by React components, which return elements that represent the desired UI state. Instead of directly manipulating the real DOM (which is slow to update), React creates a Virtual DOM—a JavaScript object tree that mirrors the structure of the real DOM.

How it works:

1. Initial Render: React builds the Virtual DOM tree based on your components.

2. State/Props Changes: When your app’s state or props change, React creates a new Virtual DOM tree representing the updated UI.

3. Diffing Algorithm: React compares the new Virtual DOM tree with the previous one, identifying exactly what changed (this process is called reconciliation).

4. Minimal Updates: React calculates the minimal set of changes needed and applies those changes to the real DOM in the most efficient way possible.

This process avoids costly full re-renders of the real DOM and optimizes performance by batching updates and minimizing direct DOM manipulations.

Benefits of Virtual DOM:

• Faster UI updates compared to direct DOM manipulation.

• Predictable rendering behavior and easier debugging.

• Enables React’s declarative programming style—developers describe what UI should look like, and React figures out how to update it.

In short, the Virtual DOM is React’s way of managing UI changes efficiently, leading to smoother and faster web applications.

Read More

How do you make a website responsive?

What is the difference between id and class in HTML/CSS?

Visit I-HUB TALENT Training institute in Hyderabad