When using jsPlumb's beforeDrop function alongside ngToast, the message may not display immediately

I have been working on a project where I am integrating the jsPlumb library to create a node-based interface.

jsPlumb provides an event called 'beforeDrop' which is triggered before connecting two endpoints. I plan to use this event to check a condition and decide whether to allow the connection or not.

If the connection is not allowed, I intend to display a message using ngToast to notify the user.

Below is my implementation of the 'beforeDrop' function:

jsPlumb.bind('beforeDrop', function(info){

    var outNodeType = $('#'+info.sourceId).data( "ptype" );
    var inNodeType = $('#'+info.targetId).data( "ptype" );

    if(outNodeType !== inNodeType){
        showMessage('warning', '<strong>Error:</strong> unable to connect '+outNodeType+' to '+inNodeType);
        return false; 
    }

    return true; 

});

Here is the function responsible for showing the ngToast message:

function showMessage(messageType, message){
        ngToast.warning({
            class: messageType,
            content: message
        });
    }

However, I am facing an issue where the ngToast message only appears after clicking anywhere on the page. This seems to be a delay in displaying the message, and I am unsure if it's related to jsPlumb and AngularJS integration or how I am calling the ngToast function.

If anyone has any suggestions on resolving this issue, I would greatly appreciate your input. Thank you in advance!

Answer №1

It appears that the jsPlumb event is being treated as occurring outside of the Angular context. This suggests that you may be invoking Angular code from a non-Angular environment. To ensure synchronization with Angular, remember to trigger $scope.apply() after invoking the toaster message function. This will prompt the toast notification to display immediately upon clicking it.

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