registration using xhr

[emath]

Hey,

I'm trying to implement registration with ajax/xhr request:

$.post({
    url: './register.php?do=addmember',
    data: formData,
    success: function(res) {
        console.log(res);
    },
    dataType: 'html',
    processData: false,
    contentType: false,
});

formData has all the data needed.

The user is successfully registered yet when I am refreshing the page, I am not logged in.
The session cookie is set successfully as well.

When I try to register the usual way, everything works fine.

What am I missing? is there something needed in the server side after the registration to acknowledge the cookie ?

Any help will be appreciated.

[emath]

I've done it successfully with XHR, If someone else will need to do this, here is an example code :

                var xhr = new XMLHttpRequest();
                var formObjData = {
                    timezoneoffset: 2,
                    dst: 2,
                    'options[adminemail]': 1,
                    'options[showemail]': 1,
                    do: 'addmember',
                    password: $("input[name='password']")[0].value,
                    passwordconfirm: $("input[name='passwordconfirm']")[0].value,
                    username: $("input[name='username']")[0].value,
                    agree: $("#agree")[0].checked,
                    email: $("input[name='email']")[0].value,
                    emailconfirm: $("input[name='email']")[0].value,
                    securitytoken: 'guest'
                };
                var strObj = '';
                
                for (var k in formObjData) {
                    if (formObjData.hasOwnProperty(k)) {
                        var val = formObjData[k];
                        strObj = strObj + `${k}=${val}&`;
                    }
                }
                strObj = strObj.slice(0, strObj.length - 1);
                xhr.open('POST', './register.php?do=addmember', true);
                xhr.onreadystatechange = function () {
                    if (xhr.readyState == 4 && xhr.status == 200) {
                        // sucess code
                    } else {
                        if (xhr.status !== 200) {
                            alert('error);
                        }
                    }
                }
                xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                xhr.send(strObj);