事件对象始终具有relatedTarget未定义

Question

bootstrap events provide us event.relatedTarget inside the available events. I am using shown.bs.modal . In normal cases event.relatedTarget has the button object from where we click and activate the modal by using onlick event on the button like below.

$("#buttonId").click(function(){
  $("#modalId").modal('toggle');
});

then we can use the following way to get the button

$('#modalId').on('shown.bs.modal', function(event) {
   var button = $(event.relatedTarget); // Button that triggered the modal
});

Now i am working on a filemanager plugin in which i have context menu binding on the browsed files, and inside the context menu i have a menu item Rename , when i click on rename i have to open the modal window and send the file name that I have to rename. I can send the filename via context menu options selection ie by clicking on the Rename option i can get the object of the file div which has the filename inside the attribute id, but this will not help because i need the file div object inside the bootstrap shown event and i am opening the modal by calling the function openRenameWindow(#clickedFileDivObject); from with in the context menu call back function and inside the function i open the modal like below

function openRenameWindow{
   $("#rename-file").modal('toggle');
}

now the problem is when i bind the event for the shown.bs.modal the event object always have the relatedTarget undefined . Can someone guide me how can i get the filename there.

Answer 1

As of my understanding, you need to pass something to your modal window, if I understood wrongly please correct me by adding a comment.

Simplest solution:

Your problem caused as you did not pass the button object as a second param when you toggled the modal window for show/display:

//pass button object 
$("#rename-file").modal('toggle', $("#buttonId"));

You can do the following scenario too:

Each link should have a class .rename and you can save fileName as data attribute in your button or a div next to your button, when you open the modal window pass the fileName as a data attribute to it.

$(".rename").click(function(e){
  e.preventDefault();
  var $this = $(this);
  var fileName = $(this).data("file");
    $("#basicModal").data("fileName", fileName).modal("toggle", $this);

});

$("#basicModal").on("shown.bs.modal", function(e){
  //data-fileName attribute associated with the modal added in the click event of the button
  alert($(this).data("fileName"));
  //my data-file associated with the button 
  alert($(e.relatedTarget).data("file"));
})

Demo in Codepen for both solutions:

If you need more options in modal windows, Here is a library that I wrote based on Bootstrap 4