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Using Virtual DOM in React.js: Top 5 Benefits

Introducing React.js and Virtual DOM?

React.js is an open-source JavaScript library for building user interfaces.

The virtual DOM is a node tree listing content, and elements and their attributes as objects and properties. The render() method of React creates a node tree from React components and updates this node tree due to the mutations caused by actions in the data model. When compared to the real DOM, Virtual DOM is in-memory representation of Real DOM. It is lightweight JavaScript object which is simply a copy of the Real DOM.

React.js maintains 2 virtual DOM at any instance of time. One of them is the updated state virtual DOM and other is the previous state virtual DOM.
Minimizing the time it takes to repaint the screen is one of the biggest concerns of Browser makers. The most appropriate thing that can be done is to minimize and batch the DOM changes that necessitates redrawing. This strategy where the DOM changes are batched and reduced, at another level of abstraction, is the idea behind React’s Virtual DOM.

List of Top 5 Benefits: The Countdown Begins

  • 5. Efficiency –

    React’s Virtual DOM provides a more efficient way of updating the view in a web application. Each time the underlying data changes in a React app, a new Virtual DOM representation of the user interface is created. Rendering the Virtual DOM is always faster than rendering the UI in the actual browser DOM.

  • 4. Greater Performance –

    Updating the Virtual DOM in React.js always increases the performance. With the setStare() method, React.js creates the whole virtual DOM from scratch. Creating a whole tree is very fast and so it enhances the performance considerably. One may argue that re-rendering the entire Virtual DOM every time there’s a possibility that something has changed would be wasteful. The fact to consider is that React is keeping two Virtual DOM trees in memory.

  • 3. Simplicity –

    From a programmer’s perspective, React and its Virtual DOM are simpler than most of the other approaches to making JavaScript reactive. Pure JavaScript code updates React components while React updates the DOM. The data binding is not intertwined with the application.

  • 2. CPU-Intensive –

    The Virtual DOM adds a layer of scripting to the optimizations the browser carries out to make the DOM manipulations transparent to the developer. Compared to all other methods of updating the DOM, this method of incorporating an additional layer of abstraction makes React much more CPU-intensive.

  • 1. Optimized Memory Usage –

    The Virtual DOM makes optimized use of the memory compared to other systems because it doesn’t hold observables in the memory. Due to the Virtual DOM, each change in the data model can trigger a complete refresh of the virtual user interface. This is very different from the systems used by other libraries that based upon the state of the document, updates them when necessary.

A tool is as good as the kind of use employed upon it. React and Virtual DOM give us a simple way of updating the browser. This ensures releasing a significant amount of memory resources and optimizing the user interface in an easier way. Thus, Virtual DOM in React provides benefits in both performance and productivity.

Rigel Networks provides highly functional web solutions based on React JavaScript Library. Our team of dedicated ReactJS developers with their strong competence and vast experience design solutions and services fit for all sizes of business—from SMEs to large enterprises. With 3.5 years of experience in building ReactJS web applications & successful completion of 11 ReactJS projects, you can entrust us your next application.

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