How to use API in javaScript using Ajax

In this tutorial we will learn how to use API in javaScript using Ajax.

How to use API in javaScript using Ajax

To use an API in JavaScript using Ajax, you can follow these steps:

Step 1  - Create an XMLHttpRequest object

var xhr = new XMLHttpRequest();

Step 2  - Open a connection to the API URL

xhr.open('GET', 'https://api.example.com/data', true);

Step 3  -  Set the response type and headers if necessary

xhr.responseType = 'json';
xhr.setRequestHeader('Content-Type', 'application/json');

Step 4  -  Define a callback function to handle the response

xhr.onload = function() {
  if (xhr.status === 200) {
    // do something with the response data
    console.log(xhr.response);
  } else {
    // handle errors
    console.error(xhr.statusText);
  }
};

Step 5  - Send the request

xhr.send();

Here's an example of using Ajax to get data from a JSON API:

var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://api.example.com/data', true);
xhr.responseType = 'json';
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.onload = function() {
  if (xhr.status === 200) {
    var data = xhr.response;
    console.log(data);
  } else {
    console.error(xhr.statusText);
  }
};
xhr.send();

Note: This is just a basic example, and there are many variations and options for using Ajax with APIs in JavaScript.