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ReactJs was created by a software engineer named Jordan Walker at Facebook. A prototype known as “FaxJS'' was released in the early stages by him. XHF and HTML which are the component libraries for PHF influenced him to create React. As it was created by Facebook it was first deployed in the year 2011 in the News feed of the company and later in the year 2012 for Instagram. In the year 2013, it was then open-sourced to the public at JSConf US.
Components allow the user to split the user interface into independent and reusable sections. Each section can then be looked at as an isolated part for further evaluation. Therefore components are referred to as the heart and soul of ReactJs. Each component has its method, structure, and API. They are the building blocks of every React application. The components in React are divided into two parts which are as follows-
A state is referred to the place from where the data comes in. In a component, the state can change anytime, and whenever it modifies, the component will re-render. Changes could be a result of various actions such as system-generated events or even user actions and these changes then define the behaviour of the component and how it will be rendered. The constructor initialises the object of a state. Multiple properties can also be stored in it. Use the setState() function to change the value of the state object. Also, you can use the setState() function so that the new and previous states can be merged.
A key is used only while working with dynamic components that are created. If the user sets the key value it helps to keep the component unique even after any modification. A user helps React identify all the items that are changed, added, or removed.
In a nutshell, you will have to be familiar with all the components before you begin your journey with React!
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Following are the essential features of ReactJS
Virtual DOM (Document Object Model) is a description of the original model. It is a one-way process of data binding. If there are any modifications in the web application, the complete User Interface is re-rendered in the representation of virtual DOM. It will always compare the new and the previous DOM to find the difference between the representation. After the comparison is completed the original DOM will update the modified changes. The application’s memory will not be wasted anymore and it will be able to run fast.
ReactJS performs effectively and efficiently. It operates faster than other alternative options for front-end frameworks in the market. It divides the UI which is complex into many unique elements. To increase productivity and decrease the time of development, many users can work together on each element parallelly.
ReactJS is designed in a way it can support Unidirectional data flow or One-way binding. The biggest advantage of this feature is it provides control to the user all around the application. Sometimes the data flows in another direction, that is the time it requires additional features. Since the components should remain permanent and also the data which is inside should not be modified. In such cases, most of the developers use Flux, a programming language to support the data flow in a unidirectional process. This will help the applications to increase their efficiency and also be more flexible.
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ReactJs has numerous advantages that are as follows;
Hope you now understand the concept of ReactJs along with its features and advantages. The chief objective of using ReactJS is its potential to use the components repeatedly. Easy to learn and simple to implement hence preferred by most organizations across the globe for the development of their applications. A recent study by Statista indicates that ReactJS is among the most in-demand web frameworks in 2022. As technology progresses so do the opportunities. Explore all the career options by visiting HKR training. Let us know if you have any queries via the comment section.
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It is an open-source, front-end library based on components, responsible for the view layer in the application.
ReactJs helps in maintaining larger applications by improving the readability of Data patterns and components.
ReactJs is used to build websites using its library whereas HTML (Hypertext Markup Language) is used to structure the websites.
The primary advantage of using ReactJS is that it helps its users to re-use the components which saves time and the developers don't have to write the same code again for the same features.