Question

Why the return value of my function always false

this is my function:

function checkUsername(username) {
    var ret=false;
    $.ajax({
        type: "POST",
        url: "user_validate.php",
        async: true,
        data: "username="+username,
        success: function(data){
            if(data == 0){
                ret = true;
            }else{
               ret = false;
            }
        },
        error:function() {
            alert("ERROR");
        }
    });
    return ret;
}

Is var ret doesn’t set the value?
Anything wrong with it..?
thanks before..!

Answer 1

The “A” in AJAX stands for “asynchronous”