The Virtual DOM is a light-weight abstraction of the DOM. You can think of it as a copy of the DOM, that can be updated without affecting the actual DOM. It has all the same properties as the real DOM object, but doesn't have the ability to write to the screen like the real DOM
In all web applications one of the most expensive operations from which an app suffers is mutating the DOM. To solve this problem, React maintains a virtual representation of the DOM, which is called Virtual DOM (VDOM). Along with a diffing algorithm, React is able to compute the data against
Follow the below steps to setup a React development environment and test it by downloading and running an example React application.
Install Node.js and npm.
Install the Git CLI.
Install Visual Studio Code.
Run an example React application (optional)
we will show you how to set up an environment for successful React development. Notice that there are many steps involved but this will help speed up the development process later
If you want to become a front-end developer or find a web development job, you would probably benefit from learning React in-depth.
In this post, you're going to learn some of the basics of React like creating a component, the JSX syntax, and Props. If you have no or little experience with React, this post is for you.
The key difference between props and state is that state is internal and controlled by the component itself while props are external and controlled by whatever renders the component
In a React component, props are variables passed to it by its parent component. State on the other hand is still variables, but directly initialized and managed by the component. The state can be initialized by props
Components are the smallest units in React application development; they are indeed the most fundamental part of React. React is a library for building UIs and components are the key for creating any UI in React. You might think of it as widgets (like in Flutter) that you can plug in anywhere.
A RESTful API is an architectural style for an application program interface (API) that uses HTTP requests to access and use data. That data can be used to GET, PUT, POST and DELETE data types, which refers to the watching, updating, creating and deleting of operations concerning resources.
The useEffect Hook allows you to perform side effects in your components.
Some examples of side effects are: fetching data, directly updating the DOM, and timers.
useEffect accepts two arguments. The second argument is optional.
The useReducer Hook is similar to the useState Hook.
It allows for custom state logic.
If you find yourself keeping track of multiple pieces of state that rely on complex logic, useReducer may be useful.