AJAX (Asynchronous JavaScript and XML) and Fetch are techniques used in frontend development to make asynchronous requests to retrieve data from a server. These techniques allow you to load data in the background without disrupting the user interface.

In modern JavaScript, the Fetch API is commonly used for making HTTP requests. It provides a more powerful and flexible way to work with asynchronous data.

To make a simple GET request using Fetch, you need to provide the URL of the server API endpoint. For example:

1const url = 'https://api.example.com/data';
2
3fetch(url)
4  .then(response => response.json())
5  .then(data => {
6    // Do something with the data
7  })
8  .catch(error => {
9    // Handle the error
10  });

In the code above, we first define the URL that points to the server API endpoint. Then we use the Fetch function to send a GET request to that URL. We chain the .then() method to parse the response as JSON and extract the data.

You can use the retrieved data to update the DOM, perform calculations, or any other operation you need. The Fetch API is flexible and can be customized to handle different types of requests and responses.

AJAX and Fetch are essential tools for frontend developers as they enable seamless communication with servers and allow the creation of dynamic web applications.

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const url = 'https://api.example.com/data';

​

fetch(url)

  .then(response => response.json())

  .then(data => {

    // Do something with the data

  })

  .catch(error => {

    // Handle the error

  });