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the virtual dom in react js

Chetan Nada answered on September 9, 2021 Popularity 10/10 Helpfulness 3/10

answer the virtual dom in react js

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the virtual dom in react js

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// the virtual dom in react js
React uses Virtual DOM, which can be thought of as a blueprint of the DOM. 
When any changes are made to React elements, the Virtual DOM is updated. 
The Virtual DOM finds the differences between it and the DOM and re-renders only the elements in the DOM that changed. 
This makes the Virtual DOM faster and more efficient than updating the entire DOM.

Popularity 10/10 Helpfulness 3/10 Language javascript

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Tags: javascript virtual-dom

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Contributed on Oct 25 2022

Chetan Nada

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what is virtual dom in react

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*** 
A virtual DOM is a lightweight JavaScript object which is the copy of the real DOM.
This Virtual DOM works in three simple steps-
 i. Whenever any underlying data changes, the entire Ul is
    re-rendered in Virtual DOM representation
 ii. Then the difference between the previous DOM representation 
      and the new one is calculated
 iii. Once the calculations are done, the real DOM will be updated with only 
       the things that have actually changed



// dom 
- With the HTML DOM, JavaScript can access
and change all the elements of an HTML document.
- The DOM represents the document as nodes and objects; that way, 
programming languages can interact with the page.



// virtual dom
- The virtual DOM (VDOM) is a programming concept where an
ideal, or “virtual”, representation of a UI is kept in memory
and synced with the “real” DOM by a library such as ReactDOM. 
This process is called reconciliation.

Popularity 10/10 Helpfulness 4/10 Language javascript

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Tags: javascript j

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Contributed on Sep 09 2021

Abhishek

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the virtual dom in react js

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