xhr post request javascript code example

Example 1: ajax request

$.ajax({
       url : 'more_com.php', //PHP file to execute
       type : 'GET', //method used POST or GET
       data : {variable1 : "some data"}, // Parameters passed to the PHP file
       success : function(result){ // Has to be there !
           
       },

       error : function(result, statut, error){ // Handle errors

       }

    });

// NOTE : Parameters will be available either through $_GET or $_POST according
// to the method you choosed to use. 
// Here you will get your variable "variable1" this way : $_GET['variable1']

Example 2: xhr post send

var xhr = new XMLHttpRequest();
var params = 'field1='+postfield1+'&field2='+postfield2;
xhr.open('POST', 'http://exmaple.com', true);

//Send the proper header information along with the request
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');

xhr.onload = function() {//Call a function when the state changes.
    if(xhr.status == 200) {
        alert(this.responseText);
    }
}
xhr.send(params);

Example 3: ajax open a request

<script>
function loadDoc() {
  var xhttp = new XMLHttpRequest();
  
  //looking for a change or state , like a request or get.
  xhttp.onreadystatechange = function() {
     
     //if equal to 4 means that its ready.
    // if equal to 200 indicates that the request has succeeded.
    if (this.readyState == 4 && this.status == 200) {
      document.getElementById("demo").innerHTML = this.responseText;
    }
  };
  
  //GET method for gettin the data // the file you are requesting
  xhttp.open("GET", "TheFileYouWant.html", true);
  
  //sending the request
  xhttp.send();
}