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How do make an HTTP request in JavaScript?

HTTP Request In JavaScript

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There are several ways to make an HTTP request in JavaScript, depending on the desired functionality and level of control. Here are a few options:

1) 'XMLHttpRequest': 


This is a built-in JavaScript object that allows you to make HTTP requests from the client side of a web application. You can use the 'open()' and 'send()' methods to initiate an HTTP request, and the 'onreadystatechange' event to handle the response. Here is an example of using 'XMLHttpRequest' to make a GET request:


var xhr = new XMLHttpRequest();

xhr.onreadystatechange = function() {
  if (this.readyState == 4 && this.status == 200) {
    console.log(this.responseText);
  }
};

xhr.open("GET", "http://example.com/api/endpoint", true);
xhr.send();

2) fetch(): 


This is a modern JavaScript function that provides an easier interface for making HTTP requests. It returns a 'Promise' that resolves to a 'Response' object, which you can then use to access the response data. Here is an example of using 'fetch()' to make a GET request:

fetch("http://example.com/api/endpoint")
  .then(response => response.text())
  .then(data => console.log(data))
  .catch(error => console.error(error));

3) Third-party libraries: 


There are also many third-party libraries that provide additional features and abstractions for making HTTP requests in JavaScript. Some popular options include 'axios', 'jQuery.ajax', and 'superagent'.

For more information on making HTTP requests in JavaScript, you may find the following resources helpful:


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