What is React.js?
React.js is an open-source JavaScript library for creating dedicated user interfaces for single-page applications.
It is used to manage the view layer of web and mobile applications. React also lets you create reusable UI components.
React was created by Jordan Walke, a software engineer who works for Facebook. React was first introduced on Facebook News Feed in 2011 and Instagram in 2012.
React allows developers to build large-scale web applications that can modify data without reloading the page.
The main goal of React is to be fast, scalable, and simple. This only applies to the app UI. This corresponds to a view in an MVC pattern. It can be combined with other JavaScript libraries or frameworks such as MVC’s AngularJS.
Languages one must know before learning React JS
React is the ultimate library for today’s front-end developers. In other words, learning React improves development, a skill that many top reactJs development companies consider essential. React developers have to work hard to upgrade or audit the skills required by Facebook’s famous JavaScript library.
1. HTML+CSS
No front-end developers new to HTML and CSS. Every organization should be able to use and create user interfaces. Basically, React developers should be able to:
- Use and description of semantic HTML tags
- Use and description of CSS selectors
- CSS reset implementation
- Learn how to reset a box model and bounding box
- Understanding Flexbox
- Use and implement responsive web principles, including appropriate users of media queries
2. JSX
In React, you don’t really touch HTML. The syntax extension you use is JSX, which is one of the most important parts of the React ecosystem. JSX is very similar to HTML and can be considered HTML-style JavaScript. The great thing about JSX is that if you know HTML and CSS, you intuitively know how to use JSX.
JSX is an abstraction of the React.createElement() API. One of the reasons it’s so important to the library, and one of the reasons the React team initially chose to use it, is that the API is cumbersome and inextensible.
You can use React.createElement() to create the whole application, but it’s not as efficient as using HTML. It may feel like taking a step back by adding markup to your template logic at first, but with JSX you can focus on styling in minutes.
3. Git
Git is essential for any development toolkit that stores projects in solutions like GitHub, Bitbucket, GitLab, etc. Skills that should be part of your daily job include:
- Add, commit, push, drag and track changes
- Branch and merge strategies
- Handling Merge Conflicts
4.Node+npm
Node may surprise many people. Why do you need to know how to become a client-side React developer using Node? You can import React into any HTML file, but there are many other packages that can extend the React library.
React developers should have a solid understanding of the npm registry. This is where software developers can go to get software that helps them create them. Sounds funny, but it’s actually npm. Cloud storage of packages called dependencies.
5.Redux
Shortcut problem warning: React has built-in state management. Many developers have been keen to discover state update asynchrony and how React handles it. For this reason, Redux was born for extensibility. Redux is a state management library etc.
It is not a framework, but an ingenious way of managing data. The principles behind Redux are functional programming and immutability, but they are not a one-size-fits-all solution. Before diving into Redux, it is important to master the basic concepts of React programming.
6.JavaScript Foundation +ES6
You can’t use React without a solid understanding of the basic concepts provided by the JavaScript language, but these ES6 skills are also essential.
Variables and Scopes
You need to know when and where the data you need is available. Variables are a mechanism built into JavaScript to keep data in memory and access data later in the application.
Arrays
React offers a model that “views are state functions”. In theory, it’s “v=f(s)”, and there are a few things to keep in mind when reviewing your library’s underlying technology.
A state is user-visible data or an item in memory that the user can access to manipulate the data. It holds all the data it presents to an object called state and accesses those bits of data through the properties of that state object.
So React got its name. When the state changes, the view is updated (`v=f(s);`). Thus, the view “reacts” to changes made to the state object.
Sorting
Storing data and making arrays and objects accessible is one thing. Whether this data can be manipulated correctly is another matter. Built-in JavaScript array methods are an essential tool in any developer’s toolbox.
DOM manipulation and event handlers
Manipulating actual DOM elements is rare in React. You can now use the JSX abstraction. Native event objects obtained from normal DOM manipulation in React are actually included in what are called synthetic events. Make sure you can attach different types of events to HTML elements like `onclicks, onchange.
Author BIO: Kamal Singh – Marketing Manager of operation and StoryTeller at Devstringx Technologies the best angular development company in India. With the experience of more than 05 years, he has mentored several leaders in the industry. He loves writing about digital, the latest technologies, venture bubbles, and market trends.
