ReactJS has emerged as one of the most preferred and fastest growing JavaScript frameworks which are used for building some unbelievable user interfaces. This framework is appreciated not just for its adjustable nature but is light-weight and an ultra-fast framework.
While building client-side apps, a team of
Facebook developers realized that the DOM is slow (The Document Object Model
(DOM) is an application programming interface (API) for HTML and XML documents.
It defines the logical structure of documents and the way a document is accessed
and manipulated.). So, to make it faster, React implements a virtual DOM that is basically
a DOM tree representation in JavaScript. So when it needs to read or write to the DOM, it will use the
virtual representation of it. Then the virtual DOM will try to find the most efficient way to
update the browser’s DOM.
Unlike browser DOM elements, React elements are plain objects and are cheap to create.
React DOM takes care of updating the DOM to match the React elements. The reason for
this is that JavaScript is very fast and it’s worth keeping a DOM tree in it to speed up its manipulation.
