No value returned from seetalert2, undefined

Let’s say I have this code:

Confirm function

function confirmFn() {
return  swal({
            title: 'Confirmation',
            html: ' Are you sure? ',
            type: 'warning',
            showCancelButton: true,
            closeOnConfirm: true,
            closeOnCancel: true
        }, function (isConfirm) {
            if (isConfirm) {
                return true;
            } else {
                return false;
            }
        });
}

If you call the function, the return value should be true or false

var reternedValue = confirmFn() ;

alert(reternedValue);  // undefined

Then sweetalert popups correctly but it doesn’t hold the script waiting for the user’s action, confirm or cancel.

[birjj]

@paschalidi This issue is old, from back before the library moved to using Promises instead. The same basic problem still applies though - you’re trying to use swal({ ... }) as a synchronous function, while user input by definition is an asynchronous action.

Here’s an example of how to work with the “new” Promise API:

swal({ ... })
    .then(function(){
        alert("The confirm button was clicked");
    }).catch(function(reason){
        alert("The alert was dismissed by the user: "+reason);
    });

A bunch more examples are in the readme.

[birjj]

On a closing note: @paschalidi this has little to do with SweetAlert2, and more to do with Promises. You should read up on those instead.