React.js: Functional Components

Name: React.js: Functional Components
Author: Tony Davydets

Learn the basics of React functional components and hooks

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Course: On-Demand

Hello, my name is Tony, and in. These lessons you will learn about functional. Components, structure and hooks. In this lesson, I will show you what functional components are. Now, before long ago, functional components were thought of as lesser components in comparison to their class based counterpart. And that is because class based components were thought of as complete. They had access to such things as state. Confunctional components were thought of as stateless lighterweight components. But with the recent addition of hooks such as use state and other hooks such as Use effect, that further exposed functional components to lifecycle functions that would otherwise only be available to their class based counterparts. Let's take a look at a parent component that we use in order to render our application. Now, first and foremost, we can see. That we are using two special functions called Use State. They are provided to us by React group and they expose a functional component. To functionality that would otherwise only be available to its class based counterpart in the previous versions of React. So, because we are using a usetate function, that function is special. It is called a hook. There are certain functions that come from. React group other than React, and when. They are used inside of a functional. Component, they expose that functional component to. The same functionality that would otherwise be only restricted to its class based counterpart. Now, functional based components are meant to be very pliable. You can see our parent component didn't. Receive any props, of course, which stands a reason. But for example, a lesser or a child component that we use inside of our parent component, the app component, does receive some props. It is not necessary, but it is something that is really useful in a functional component. Since the introduction of hooks, class based components have more or less been on the way out in the React ecosystem. And if you are dealing with a. Framework that is newer in nature, you can see that class based components are being replaced by functional components. That has to do a lot with. Performance, with the way things are hoisted after a bundle is built. We are not going to get into all of that now. But let's just say that functional components are a more modern equivalent of their class based counterpart. Even though class based are still very much around and are being used, functional. Components have now become more prominent due. To the recent introduction of hooks by the React group. In our next lesson, we are going to take a look at what hooks are and what other lifecycle functions we can have exposed to us through the use of hooks. Thank you for watching.

Provider : Tony Davydets 1 Lesson · 26m in Arabic, German, English, Spanish, French, Portuguese, Chinese

Course Description

In this course, we will cover the structure, hooks, and lifecycle functions of functional components, as well as how to use the most commonly used hooks like useEffect, useState, useCallback, and useMemo.

React Functional Components are an essential building block of any React.js application. They allow developers to create reusable, stateless UI components using a function-based syntax. In these lessons, we will dive deep into the structure, hooks, and lifecycle functions of Functional Components, including how to define and use props, and how to manage state using hooks.

The structure of Functional Components is different from Class Components, as they do not rely on a class-based syntax. Instead, they take in props as a parameter and return JSX as output. We will explore the anatomy of a functional component, including how to define and use props, how to use the useState hook to manage component state, and how to render JSX.

Hooks are a powerful concept in React Functional Components, allowing developers to add state and other functionality to function-based components. We will explore the most commonly used hooks in React, including useEffect, useState, useCallback, and useMemo.

What You'll Learn

Understand the structure of React functional components and how they differ from class components
Define and use props as parameters and return JSX as output
Manage component state using the useState hook
Apply commonly used React hooks including useEffect, useState, useCallback, and useMemo
Explore the hooks and lifecycle functions of functional components

Key Takeaways

React functional components are an essential building block of any React.js application, allowing developers to create reusable, stateless UI components using a function-based syntax.
Unlike class components, functional components do not rely on class-based syntax; they take in props as a parameter and return JSX as output.
Hooks allow developers to add state and other functionality to function-based components.
The most commonly used hooks covered are useEffect, useState, useCallback, and useMemo.
The course covers defining and using props, managing state with the useState hook, and rendering JSX.

Frequently Asked Questions

What does this course cover?

The course covers the structure, hooks, and lifecycle functions of React functional components, including how to define and use props, how to manage state with the useState hook, and how to use commonly used hooks like useEffect, useState, useCallback, and useMemo.

What skills will I gain from this course?

You will gain skills in component libraries, functional programming, HTML components, React JSX, Reactstrap, and the React.js JavaScript library.

How are functional components different from class components?

Functional components do not rely on a class-based syntax. Instead, they take in props as a parameter and return JSX as output.

What hooks are covered in this course?

The course explores the most commonly used hooks in React, including useEffect, useState, useCallback, and useMemo.

What are the learning objectives of this course?

The learning objectives are to understand React functional components, React hooks, and React props.