Components In ReactJs

 In blog, Business, Code Quality

What is ReactJs Component?

A Component is one of the core building blocks of React.

Every Application pages build with multiple pieces that are called components.

Components make the task of developing UI much better and easier.

 Features of ReactJs

 In the image, UI is broken down into multiple pieces and that is called “Component”. Here the components are Header, Side menu, content, and footer.

These components work independently. Merge all components in a parent that makes the final UI.

Benefits of ReactJs Components:

Easy to use

Reusability

Testability

Efficiency

Consistency

Maintainability

Types of Components:

Class-based Component

These components are having simple classes made up of multiple functions. The class-based components are aware of other components and also can work with each other components.

 The component has to include the extended React. A component statement, this statement creates an inheritance to React. Component, and gives your component access to React.Component’s functions.

The component also requires a render() method, this method returns HTML.

 Example:

Function-based Component

Functional components are simply JavaScript functions. 

We can create a functional component in React by writing a JavaScript function.

 Function-based components were less complex than class-based components.

It also returns HTML and behaves the same as the class component. But with less code and easy to understand.

Now React application has a component called HypeTeq, which returns a <h2> element.

To use this component in application, use similar syntax as normal HTML: <HypeTeq />

Functional Components vs Class Components:

  Functional Component  Class Component
It is known as “Stateless components” as they simply accept data and display it.It is known as “Stateful components” because they implement logic and state.
There is no render method used in functional components.It must have the render() method returning JSX.
React lifecycle methods cannot be used in functional components.React lifecycle methods can be used inside class components.
A functional component is just a plain JavaScript function that accepts props as an argument and returns a React element.A class component requires you to extend from React. Component and create a render function that returns a React element.

Conclusion:

  •  There are pros and cons to both types of components but I would like to conclude that functional components are taking over modern React. The functional component is written shorter and simpler, which makes it easier to develop, understand, and test. Functional components can keep everything clean. It also supports React Hooks which will make performance optimizations by avoiding unnecessary checks and memory allocations.
I hope this article helped to get more familiar with modern React.

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