How do you send data using a POST request in Axios?

Axios is a popular JavaScript library used for making HTTP requests from a browser or Node.js. It simplifies the process of sending asynchronous HTTP requests to REST endpoints. Developers use it for easy handling of network requests like GET, POST, PUT, DELETE, and PATCH. 
 
 axios.get('/user').then(response => console.log(response));

To make a GET request with Axios, use the `axios.get()` method. It accepts the URL of the resource you want to fetch and returns a promise, allowing you to handle the response or errors. The response data can be accessed through the `.data` property. 
 
 axios.get('https://api.example.com/data').then(response => console.log(response.data));

In Axios, you can send data using a POST request with `axios.post()`. It accepts two parameters: the URL and the data to be sent in the request body. This method is often used to create new resources or send form data to a server. 
 
 axios.post('/user', { firstName: 'John', lastName: 'Doe' }).then(response => console.log(response));

Axios provides built-in error handling with promises. Use the `.catch()` method to capture errors or you can use a `try-catch` block in an async/await function. Axios errors include information such as the request, response, and configuration, making debugging easier. 
 
 axios.get('/user').catch(error => console.log(error));

Axios is a third-party library that simplifies HTTP requests, while Fetch is a native JavaScript API. Axios supports request and response interceptors, automatic JSON transformations, and better error handling. Fetch requires more setup, particularly for error handling and parsing response data. 
 
 // Fetch: fetch('/api/data').then(res => res.json()).then(data => console.log(data));
// Axios: axios.get('/api/data').then(response => console.log(response.data));