CODEWITHSUNDEEP
jqueryajaxforms
jq beginner
jq beginner

Reputation: 1070

ajax call returns true after returning false and form submits

I'm having a function that returns true or false to submit a form via ajax

<form method="post" onsubmit="return validate()">
  <input type="text" name="user" id="user">
</form>

function validate(){
  var n = $("#user").val();
  if(n.length<2){           
        return false;
    }
    else{
        $.ajax({
            url: 'ajax/checkuser.php',
            global: false,
            type: 'POST',
            data: {user:n},
            async: false, //blocks window close
            success: function(data) {
                if(data.trim().indexOf('exists')>-1){
                    alert('user exists);
                    return false;
                }
                else if(data.trim().indexOf('ok')>-1){
                    return true;
                }
            }
        });
    }
}

when I press ESC and check the Net via console i find the ajax request returning 'exists' and the alert of 'user exists' is fired but the form gets submitted while it shouldn't submit

enter image description here

Upvotes: 0

Views: 3461

Answers (1)

Abhijeet K.
Abhijeet K.

Reputation: 537

Its not working right now because you are not returning the false response to your form but your ajax success callback.

Please try the updated following code snippet:

<form method="post" onsubmit="return validate()">
  <input type="text" name="user" id="user">
</form>

function validate(){
  var retValue = false;
  var n = $("#user").val();
  if(n.length<2){           
        retValue = false;
    }
    else{
        $.ajax({
            url: 'ajax/checkuser.php',
            global: false,
            type: 'POST',
            data: {user:n},
            async: false, //blocks window close
            success: function(data) {
                if(data.trim().indexOf('exists')>-1){
                    alert('user exists);
                    retValue = false;
                }
                else if(data.trim().indexOf('ok')>-1){
                    retValue = true;
                }
            }
        });
    }
return retValue;
}

Upvotes: 5

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