Making a variable in JavaScript from AJAX return Value

Question

I scanned a lot of answers here but didn't find a good answer. I'm new to PHP and JavaScript and want to create a variable (for comparison purposes) from a jQuery return value. I'm creating a registration system where I use this to check username availability:

$(document).ready(function() {
    $("#username").keyup(function (e) {

        //removes spaces from username
        $(this).val($(this).val().replace(/\s/g, ''));

        var username = $(this).val();
        if(username.length < 2){$("#user-result").html('');return;}

        if(username.length >= 2){
            $("#user-result").html('<i class="fa fa-refresh fa-spin"></i>');
            $.post('core/check_username.php', {'username':username}, function(data) {
             $("#user-result").html(data);
            });
        }
    }); 
});

I can display the return value in a span but for form validation purpose, I need to compare this return value with a set of criteria. How can I declare a variable from this return value?

low_rents · Accepted Answer · 2015-07-02 07:01:40Z

1

in your $.post function you get data returned from your ajax-call. just use this to do further stuff with the username:

$.post('core/check_username.php', {'username':username}, function(data) {
    $("#user-result").html(data);

    var username = data;

    if(username == "xxx")
    {
        // do some stuff here
    }
});

answered Jul 2, 2015 at 7:01

low_rents

4,4813 gold badges30 silver badges55 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Making a variable in JavaScript from AJAX return Value

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related