1const Http = new XMLHttpRequest();
2const url='https://jsonplaceholder.typicode.com/posts';
3Http.open("GET", url);
4Http.send();
5
6Http.onreadystatechange = (e) => {
7  console.log(Http.responseText)
8}

1// Use these functions:
2
3function _GET_REQUEST(url, response) {
4  var xhttp;
5  if (window.XMLHttpRequest) {
6    xhttp = new XMLHttpRequest();
7  } else {
8    xhttp = new ActiveXObject("Microsoft.XMLHTTP");
9  }
10
11  xhttp.onreadystatechange = function() {
12    if (this.readyState == 4 && this.status == 200) {
13      response(this.responseText);
14    }
15  };
16
17  xhttp.open("GET", url, true);
18  xhttp.send();
19}
20
21function _POST_REQUEST(url, params, response) {
22  var xhttp;
23  if (window.XMLHttpRequest) {
24    xhttp = new XMLHttpRequest();
25  } else {
26    xhttp = new ActiveXObject("Microsoft.XMLHTTP");
27  }
28
29  xhttp.onreadystatechange = function() {
30    if (this.readyState == 4 && this.status == 200) {
31      response(this.responseText);
32    }
33  };
34
35  xhttp.open("POST", url, true);
36  xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
37  xhttp.send(params);
38}
39
40
41// Use like:
42_GET_REQUEST('http://url.com', (response) => {
43	// Do something with variable response
44  	console.log(response);
45});
46_POST_REQUEST('http://url.com', 'parameter=sometext', (response) => {
47	// Do something with variable response
48  	console.log(response);
49});

1function httpGetAsync(url, callback) {
2  var xmlHttp = new XMLHttpRequest();
3  xmlHttp.onreadystatechange = function() { 
4    if (xmlHttp.readyState == 4 && xmlHttp.status == 200)
5      callback(xmlHttp.responseText);
6  }
7  xmlHttp.open("GET", url, true); // true for asynchronous 
8  xmlHttp.send(null);
9}

1<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

1const xhr = new XMLHttpRequest();
2JavaScriptCopy

1xhr.open(Method, URL[, Async]);
2JavaScriptCopy