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.

React Router Dom

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React Tutorial

React Tutorial

What is a Component?

The React component is a piece of reusable code that is used to create one or more parts of a user interface (UI) in a React app. A component can be as simple as a piece of text or it can be a complex UI element, such as a form.

Here are some examples of React components:

A button that a user can click on to submit a form
A dropdown menu that allows a user to select an item from a list
A carousel that displays multiple images
A navigation bar that shows links to different pages in the app
A graph or chart that displays data in a visual format.

In general, a React component is a function or class that takes in input data and returns a React element (which is a description of a part of a UI). This element can then be rendered to the screen using the React library.

Here is a basic example of a React component written in JavaScript:

This component is a class that extends the React.Component base class. This class has a render() method, which returns a React element. In this case, the element is a <h1> heading that says "Hello, World!".

To use this component in a React app, you should import it into your app and then use the <MyComponent> tag in your JSX code to render it to the screen. For example:

In this example, the App function is a simple React component that returns a <div> element containing the <MyComponent> element. When this component is rendered to the screen, it will display the "Hello, World!" heading.

This is just a very simple example of a React component. In a real-world app, components can be much more complex and can include many different UI elements and features.

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