React.js tutorials generated by ChatGPT

routing-01.md

Routing 101

React Router is a library that allows you to handle routing within a React application. It provides a way to map URLs to components, so that when a user navigates to a certain URL, the corresponding component will be displayed.

To get started with React Router, you'll first need to install it. You can do this by running the following command in your terminal:

npm install react-router-dom

Once you have React Router installed, you can import it into your application and start using it. Here is an example of how you might use React Router to handle routing in a simple application:

import { BrowserRouter as Router, Route } from 'react-router-dom';

function App() {
  return (
    <Router>
      <Route path=\"/\" exact component={Home} />
      <Route path=\"/about\" component={About} />
      <Route path=\"/contact\" component={Contact} />
    </Router>
  );
}

In this example, we're using the BrowserRouter component from React Router to handle client-side routing. We're also using the Route component to define our routes. Each Route component takes a path prop, which is the URL that the route corresponds to, and a component prop, which is the component that should be rendered when the route is accessed.

You can also pass props to the component using the render method.

<Route path='/about' render={(props) => <About {...props} extra={extra} />} />

You can also use Link component to navigate between different routes

import { Link } from 'react-router-dom';

<Link to=\"/about\">About</Link>

You can also use useParams hook to extract parameter from the url

import { useParams } from \"react-router-dom\";

function User() {
  let { id } = useParams();

  return <h3>ID: {id}</h3>;
}

//in route 
<Route path=\"/users/:id\" component={User} />

You can also use useLocation hook to get current location information

import { useLocation } from \"react-router-dom\";

function useQuery() {
  return new URLSearchParams(useLocation().search);
}

function About() {
  let query = useQuery();

  return (
    <div>
      <h2>About</h2>
      <p>{query.get(\"message\")}</p>
    </div>
  );
}

This is just a basic example of how you can use React Router to handle routing in a React application. There are many other features and capabilities of React Router that you can explore, such as dynamic routing, nested routing, and protected routes.

For more information, please check the official documentation: https://reactrouter.com/web/guides/quick-start.

routing-02.md

Nested Routing

Nested routing in React allows you to organize your routes in a hierarchical manner, where some routes are nested under others. This can be useful for creating more complex applications with multiple levels of navigation.

To set up nested routing in React, you'll first need to make sure you have React Router installed. You can do this by running the following command in your terminal:

npm install react-router-dom

Once you have React Router installed, you can start using it to create nested routes. Here is an example of how you might create nested routes in a simple application:

import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';

function App() {
  return (
    <Router>
      <Switch>
        <Route path=\"/\" exact component={Home} />
        <Route path=\"/about\" component={About} />
        <Route path=\"/users\" component={Users}>
          <Route path=\"/users/:id\" component={User} />
        </Route>
      </Switch>
    </Router>
  );
}

In this example, we have a top-level route for /users which renders the Users component. Then we have a nested route for /users/:id which renders the User component.

You can also use Switch component to make sure only one route is matched at a time.

You can also use useParams hook to extract the parameter from the url

import { useParams } from \"react-router-dom\";

function User() {
  let { id } = useParams();

  return <h3>ID: {id}</h3>;
}

You can also use Link component to navigate between different routes

import { Link } from 'react-router-dom';

<Link to=\"/users/1\">User 1</Link>

You can also use useRouteMatch hook to get the matched path

import { useRouteMatch } from \"react-router-dom\";

function Users() {
  let match = useRouteMatch();

  return (
    <div>
      <h2>Users</h2>
      <ul>
        <li>
          <Link to={`${match.url}/1`}>User 1</Link>
        </li>
        <li>
          <Link to={`${match.url}/2`}>User 2</Link>
        </li>
      </ul>
    </div>
  );
}

You can also use Redirect component to redirect from one route to another

import { Redirect } from 'react-router-dom';

<Route path='/old' exact>
  <Redirect to='/new' />
</Route>

This is just a basic example of how you can use React Router to handle nested routing in a React application. There are many other features and capabilities of React Router that you can explore, such as dynamic routing and protected routes.

For more information, please check the official documentation: https://reactrouter.com/web/guides/nesting

routing-03.md

Routing 101 - Version 6

React Router is a powerful library that allows you to handle routing in your React application. With React Router, you can define different routes for different parts of your application and handle navigation between them.

In this tutorial, we will cover the basics of routing in React using React Router 6. We will also cover some advanced topics to help you understand how to use React Router to its fullest potential.

Section 1: Basics

1. Installation

To get started with React Router, you will first need to install it in your project. You can do this by running the following command in your terminal:

npm install react-router-dom

2. Setting up the Router

Once you have React Router installed, you can start setting up the router in your application. You can do this by importing the Router component from react-router-dom and wrapping your application's root component with it.

import { Router } from "react-router-dom";

function App() {
  return <Router>{/* Your application's components go here */}</Router>;
}

3. Defining Routes

With the router set up, you can start defining routes for your application. You can do this by importing the Route component from react-router-dom and using it to define different routes for different parts of your application.

import { Route } from "react-router-dom";

function App() {
  return (
    <Router>
      <Route path="/" exact component={Home} />
      <Route path="/about" component={About} />
      <Route path="/users" component={Users} />
    </Router>
  );
}

In this example, we have defined three routes for our application: / for the home page, /about for the about page, and /users for the users page.

4. Handling Navigation

With the routes defined, you can start handling navigation between them. You can do this by importing the Link component from react-router-dom and using it to create links between different parts of your application.

import { Link } from "react-router-dom";

function Home() {
  return (
    <div>
      <h1>Home</h1>
      <Link to="/about">Go to About</Link>
    </div>
  );
}

In this example, we have created a link that allows the user to navigate from the home page to the about page.

5. Using Params

React Router also allows you to use params in your routes. You can do this by including a parameter in the path of a route and then using the useParams hook to extract it.

import { Route, useParams } from "react-router-dom";

function User() {
  let { id } = useParams();

  return <h3>User ID: {id}</h3>;
}

function App() {
  return (
    <Router>
      <Route path="/" exact component={Home} />
      <Route path="/about" component={About} />
      <Route path="/users/:id" component={User} />
    </Router>
  );
}