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.

Syntax

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.

React Router Dom

Course Content

React Tutorial

React Tutorial

Syntax

In React, functional components are defined as JavaScript functions that take in props as an argument and return JSX. Here is the basic syntax for a functional component:

The function name (in this case, MyComponent) is used to represent the component, and the function takes in a single argument called props. props stand for "properties" and is an object that contains all the data that is passed to the component from its parent.

Inside the function, you can return JSX by wrapping it in parentheses. For example, here is a functional component that renders a simple heading:

You can then use this component in your JSX by calling it like a regular HTML tag:

This will render the following JSX:

Functional components can also accept additional arguments, such as event handlers or values that are calculated within the component. For example, here is a functional component that renders a button that increases a counter when clicked:

This component accepts an onClick prop that is a function that is called when the button is clicked, and a count prop that is the current value of the counter. You can then use this component like this:

This will render a button with the current count value and will call the handleClick function when the button is clicked.

Functional components are a simple and powerful way to define components in React, and they are a great choice for many use cases. They are easy to understand and use, and they can make your code more concise and readable.

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Section 3. Chapter 1

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