1$.ajax({
2   url: 'ajaxfile.php',
3   type: 'post',
4   data: {name:'yogesh',salary: 35000,email: 'yogesh@makitweb.com'},
5   success: function(response){
6
7   }
8});

1function makeRequest (method, url, data) {
2  return new Promise(function (resolve, reject) {
3    var xhr = new XMLHttpRequest();
4    xhr.open(method, url);
5    xhr.onload = function () {
6      if (this.status >= 200 && this.status < 300) {
7        resolve(xhr.response);
8      } else {
9        reject({
10          status: this.status,
11          statusText: xhr.statusText
12        });
13      }
14    };
15    xhr.onerror = function () {
16      reject({
17        status: this.status,
18        statusText: xhr.statusText
19      });
20    };
21    if(method=="POST" && data){
22        xhr.send(data);
23    }else{
24        xhr.send();
25    }
26  });
27}
28
29//POST example
30var data={"person":"john","balance":1.23};
31makeRequest('POST', "https://www.codegrepper.com/endpoint.php?param1=yoyoma",data).then(function(data){
32              var results=JSON.parse(data);
33});