How to make an HTTP request in Javascript?

To make an HTTP request in JavaScript, you can use the XMLHttpRequest object or the newer fetch() API. Here’s an example using XMLHttpRequest:

var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://www.example.com/', true);

xhr.onload = function () {
  if (xhr.status === 200) {
    // Request succeeded. Do something with the response.
    var response = xhr.responseText;
  } else {
    // Request failed. Do something with the error.
  }
};

xhr.send();

And here’s an example using fetch():

fetch('http://www.example.com/')
  .then(function(response) {
    // Request succeeded. Do something with the response.
    return response.text();
  })
  .then(function(responseText) {
    // Do something with the response text.
  })
  .catch(function(error) {
    // Request failed. Do something with the error.
  });

Both examples make a GET request to the specified URL. You can replace GET with other HTTP methods (such as POST, PUT, etc.) to make requests using those methods. You can also pass additional options and headers to the open() and fetch() methods to customize the request.