javascript send json post code example

Example 1: how to send json in js with post

// Sending and receiving data in JSON format using POST method
//
var xhr = new XMLHttpRequest();
var url = "url";
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", "application/json");
xhr.onreadystatechange = function () {
    if (xhr.readyState === 4 && xhr.status === 200) {
        var json = JSON.parse(xhr.responseText);
        console.log(json.email + ", " + json.password);
    }
};
var data = JSON.stringify({"email": "[email protected]", "password": "101010"});
xhr.send(data);

Example 2: send json post ajax javascript

$.ajax({
    url: 'users.php',
    dataType: 'json',
    type: 'post',
    contentType: 'application/json',
    data: JSON.stringify( { "first-name": $('#first-name').val(), "last-name": $('#last-name').val() } ),
    processData: false,
    success: function( data, textStatus, jQxhr ){
        $('#response pre').html( JSON.stringify( data ) );
    },
    error: function( jqXhr, textStatus, errorThrown ){
        console.log( errorThrown );
    }
});