Why the concept of virtual DOM was introduced?
The web applications that are being built to handle lists of data uses Data object model (DOM) when one record is deleted then all the entries needs to be updated in DOM which is even more expensive than loading js. To avoid this frequent DOM updating problem an innovative idea of virtual DOM was adopted. React js uses JSX element that gives the capabilities to combine CSS with js when any change is made in these files then jsx files are rendered as virtual DOM. This virtual DOM is then compared with last recorded DOM map to know which component is changed. After figuring it out only that component in real DOM is added or modified which reduces frequent real DOM interactions and speed up react based web applications.
All the above mentioned factors are responsible for growing popularity of react js web application development but the biggest reason is its performance that is achieved with simple yet effective approach of DOM. Now vue js is taking couple of steps ahead to reduce the development and asset rendering time which has lead vue js to become biggest competitor of react js. No matter who gets popular the developers and consumers are going to benefit from this war of frameworks.
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