What is virtual dom and its benefits that you must know

virtual dom

As there are over 1,74 billion websites in 2020, managing them is not simple. Therefore, if a developer wants to create a changeable and large web app without reloading it, they often choose React. In fact, React is fast, simple yet very effective. One of its biggest features is Virtual DOM and we are going to discuss it today!

So, what is Virtual DOM? How can it help you? And why is it widely used? This article, written by the ArrowHitech committed team, will deliver easy answers. Above all, we hope to help you gain some insights and maybe you can use it in the future.

To begin, let’s answer our first question:

What is Virtual DOM?

Like what we mentioned above, it is one of the most notable React features. In a nutshell, React is an open-source JavaScript library for creating UI. For starters, we also dedicate another focusing React article for you to read.

The first thing you need to know about what is virtual dom is that “DOM” stands for “Document Object Model”. It represents your application’s UI. As a result, whenever there is a change in UI, the DOM becomes updated.

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What is VD

Likewise, Virtual DOM is the virtual representation. It surely works faster and more effective and (Real) DOM. What’s more, because DOM only needs few operations, it can reduce the performance cost greatly.

That is to say about What is virtual dom, it’s time for the next essential point:

How does Virtual DOM work in React?

As soon as you answer What is virtual dom, let’s continue to explore how does Virtual Dom work in React.

Render () function

As Virtual DOM is a node tree listing content, render() function is the very first point of entry. Again, whenever a component changes, it is updated and the render() will turn to a different tree or branch of React elements.

Thanks to this feature, React will know how to update UI in the most effective way!

Batch update

This is what React follows to update Virtual DOM. Instead of sending updates for 1 change only, it helps send in a batch. Therefore, performance can run more smoothly and fast.

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How does Virtual DOM works?

Yet why is Virtual DOM effective? In particular, what are the key benefits? Let’s find out in the final part:

Top 5 benefits that Virtual DOM offers

#1. Maximized Memory Usage

Virtual DOM features make it use less noticeable space in memory usage. A new virtual UI is triggered via a single change in the data model. This is a superior benefit to React when compared to other libraries such as AngularJS, VueJS, and EmberJS.

#2. CPU

The updating method of adding a scripting layer makes DOM manipulations transparent to the programmers. As a result, VD makes React more CPU intensive!

#3. High Performance

When React creates Virtual DOM from the beginning, it uses setState(). 

(You can read more about setState() on their official site)

It helps better performance thanks to less time building the complete tree. In fact, because React keeps not 1, but 2 VD trees in its memory, it even greatly boosts the productivity. 

Brings multiple benefits

#4. Simple Use

Yes, an amazing and effective product with complicated use is so ineffective! Our skilled developers believe that React and VD are pretty much easier to use than other JavaScript approaches. For newcomers, if you don’t know where to start, contact our 24/7 service and we will answer you as soon as possible.

#5. Productivity

An efficient way of updating data in web applications like what we’ve mentioned a couple of times will increase efficiency. Virtual DOM is faster and easier to render than UI in the real DOM.

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Bottom line

Above all, we hope that our article helps you gain more necessary knowledge and information to make the perfect decision. As always, ArrowHitech truly wishes you the best of success, health and good luck! Then, let’s CONTACT US if you have any question about this topic of What is virtual dom.

Besides, for more detail about ArrowHiTech, we value every customer, treat them like family and build relationships on trust. For that reason, we are confident that we can help YOU operate your online stores and deliver the best solutions at an affordable cost. For reference, check out our ReactJS Development services right now – we welcome customers all the time!