React Tutorial

React Tutorial

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1. Getting Started

The prompt provides a list of terms that are commonly used in React, a popular JavaScript library for building user interfaces. The terms include React, component, virtual DOM, JSX, constructor() method, render() method, state, setState() method, props, and binding methods. The prompt does not provide any additional context or information about these terms.

What is a Component?

State and setState()

Props (properties)

Binding Methods

2. Lifecycle Methods

Now that we have become familiar with most of the React basics and how components work and integrate into the development of a website. Since we know that React components are loaded onto the main page and then can be dynamically updated which means that they go through a certain cycle of stages that can be intervened in and the behavior can be updated. This cycle can be manipulated through what are called lifecycle functions at different stages. React class component lifecycle methods are used for a variety of purposes, including performing setup tasks when a component is first rendered, updating a component in response to changes in props or state, and cleaning up any resources that the component is using.

componentWillMount()

componentWillUnmount()

componentDidMount()

shouldComponentUpdate()

componentDidUpdate()

componentDidCatch()

Overview of Component Lifecycle

3. Functional Components and Hooks

Now that we have gone over the basics of class-based components, we will now explore a better and more concise way to write React components with functional components which are a lot more commonly used in React these days. Functional components are a way to define components in React that are simple, lightweight, and only consist of a render function. They are a great choice for simple, presentational components that only need to render some JSX and don't have their own state or lifecycle methods. In this section of the course, we'll look at how to use functional components with Hooks to manage state and other lifecycle events.

What is a Hook?

4. Advanced Topics

Now, we understand the basics of React with regards to the various kinds of components available and how to use them and exploit their lifecycle to our advantage in a webpage, we will now move on to some advanced topics. These topics will deal with topics like state management through Context API and the Consumer and Provider architecture in React and how these things make life easier in a production-level React App. Then we will move onto Routing in react and how it all works to produce a navigable React App without having to reload the page. This involves studying an important React package called “react-router-dom” which we will get into in this section.

Context API

React Router Dom

Course Content

React Tutorial

React Tutorial

Context API

The React Context API is a way to share values across the component tree without the need to pass props down through every level of the tree. It allows you to avoid prop drilling, which is the process of passing props down through multiple levels of the component tree just to get to a deeply nested component that needs the data.

How it works?

Create a context object: The first step is to create a context object using React.createContext(). This function returns an object with two components: Provider and Consumer.
Provide the context value: The Provider component is used to provide the context value to the component tree. It takes a value prop, which is the value that you want to share across the component tree. You can wrap any part of the component tree with a Provider component to make the value available to all the components within it.
Consume the context value: The Consumer component is used to consume the context value. It works by rendering its children as a function and passing the context value as an argument. You can use the Consumer component anywhere within the component tree to access the context value.

Here's an example of how you can use the React Context API to pass a theme value down the component tree:

In this example, the ThemeTogglerButton component is able to consume the theme and toggleTheme values without having to pass them down as props through every level of the component tree.

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Section 4. Chapter 1

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