Prevent automatic sliding in Bootstrap 4 carousel with the 'slide.bs.carousel' event

My goal is to implement a bootstrap4 carousel with two distinct steps:

  • The first carousel item focuses on authentication, prompting for a username and password.
  • In the second step, authorization takes place where the user must select from a list of accessible groups.

I am seeking a solution to verify the validity of the entered credentials before advancing to the next slide using JavaScript code. While I am able to utilize .carousel('pause'), preventing the transition to the subsequent slide has proven challenging. Moreover, I prefer not to introduce an additional button specifically for checking the input contents.

$('#myCarousel').on('slide.bs.carousel', function (e) {
    // authentication check here

    if (!isAuth) 
    {
        // remain on current slide
    }
    else
    {
        // proceed to the next slide
    }

})

Is there any method available to achieve this functionality?

Note: I have disabled auto-sliding by setting data-interval="false". Users navigate manually between slides, either through clicks or arrow keys.

Answer №1

If you want to halt the sliding action once the slide.bs.carousel event is activated, simply use preventDefault() on the event variable. This method works for slide events triggered either automatically or manually.

$('#myCarousel').on('slide.bs.carousel', function (e) {
    // additional checks can be implemented here        
    if (stop) {
        e.preventDefault();
    }
})

For more information and details from the Bootstrap source code related to this, check here.

If your carousel has automatic cycling enabled, using this approach will allow you to pause the carousel without it automatically restarting later on during the slide function. For reference, see this link.

To view a working example, visit this JSFiddle link.

Answer №2

Try using this method:

$('#myCarousel').on('slide.bs.carousel', function (e) {
// add authentication logic here

if (isAuthenticated === false) 
{
   $('#myCarousel').carousel('pause');
   return false; // remain on current slide
}
else
{
   $('#myCarousel').carousel('cycle');
   return true; // move to next slide
}

})

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