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 );
}
});