xmlhttprequest

Performing a GET request

This code sample demonstrates how to perform a simple GET request to retrieve data from a specified URL.

var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest;
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
  if (xhr.readyState == 4 && xhr.status == 200) {
    console.log(xhr.responseText);
  }
};
xhr.open('GET', 'http://example.com', true);
xhr.send();

Performing a POST request

This code sample shows how to perform a POST request to send JSON data to a server.

var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest;
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
  if (xhr.readyState == 4 && xhr.status == 200) {
    console.log(xhr.responseText);
  }
};
xhr.open('POST', 'http://example.com', true);
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.send(JSON.stringify({ key: 'value' }));

Setting request headers

This code sample illustrates how to set custom HTTP headers for a request.

var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest;
var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://example.com', true);
xhr.setRequestHeader('X-Custom-Header', 'value');
xhr.send();

Handling errors

This code sample demonstrates how to handle network errors that may occur during the request.

var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest;
var xhr = new XMLHttpRequest();
xhr.onerror = function() {
  console.error('Request failed');
};
xhr.open('GET', 'http://example.com', true);
xhr.send();