Prevent Bootstrap dropdown from closing on clicks

问题:

This question already has an answer here:

How do I prevent my dropdown from closing when clicking inside it? (1 answer)

Closed 2 years ago.

My menu uses Bootstrap 3 and I can't prevent dropdown from closing on click. How can I do it?

JSFiddle

 // Add open class if active
  $('.sidebar-nav').find('li.dropdown.active').addClass('open');

  // Open submenu if active
  $('.sidebar-nav').find('li.dropdown.open ul').css("display","block");

  // Change active menu
  $(".sidebar-nav > li").click(function(){
    $(".sidebar-nav > li").removeClass("active");
    $(this).addClass("active");
  });

  // Add open animation
  $('.dropdown').on('show.bs.dropdown', function(e){
    $(this).find('.dropdown-menu').first().stop(true, true).slideDown();
  });

  // Add close animation
  $('.dropdown').on('hide.bs.dropdown', function(e){
    $(this).find('.dropdown-menu').first().stop(true, true).slideUp();
  });

回答1:

You need to stop event from bubbling up the DOM tree:

$('.dropdown-menu').click(function(e) {
    e.stopPropagation();
});

event.stopPropagation prevents event from reaching the node where it's eventually handled by Bootstrap hiding menu.

Demo: http://jsfiddle.net/wkc5md23/3/

回答2:

I believe this should be a more proper solution, as stopping propagation on the click event might sometimes cause issues later on in development. You may read more into it here: http://css-tricks.com/dangers-stopping-event-propagation/ Instead this solution stops propagation on the Bootstrap hide (hide.bs.dropdown) event, which stops it from continuing on to the hidden (hidden.bs.dropdown) event.

The following code has been taken and edited by myself to make it work on all Bootstrap dropdowns, as it has originally been taken from here: Preventing bootstrap dropdown from closing on click I personally prefer this way also because it uses the built in Bootstrap dropdown events, which could be found here: https://getbootstrap.com/docs/3.4/javascript/#dropdowns-events.

  $(function() {
      $('.dropdown').on({
          "click": function(event) {
            if ($(event.target).closest('.dropdown-toggle').length) {
              $(this).data('closable', true);
            } else {
              $(this).data('closable', false);
            }
          },
          "hide.bs.dropdown": function(event) {
            hide = $(this).data('closable');
            $(this).data('closable', true);
            return hide;
          }
      });
  });

回答3:

Not close in click out side menu

$(function() {
var closeble = false;
$('body').on('click', function (e) {
    if (!$(event.target).is("a.dropdown-toggle")) {
        closeble = false;
    }

});
$('.dropdown').on({
    "click": function(event) {
        if ($(event.target).closest('.dropdown-toggle').length) {
            closeble = true;
        } else {
            closeble = false;
        }
    },
    "hide.bs.dropdown": function() {
        return closeble;
    }
});

});

回答4:

You can disable the dropdown functionality temporarily. This is a workaround.

Example with input field inside the drop-down "menu":

    //for dropdown field not closing when clicking on inputfield
    $(document).on('focus', 'input', function(e) {

  // this attribute can be anything except "dropdown", you can leave it blank 
      $('#yourDropdownID').attr('data-toggle','off'); 

    });

    //for dropdown field back to normal when not on inputfield
    $(document).on('focusout', 'input', function(e) {

      $('#yourDropdownID').attr('data-toggle','dropdown');

    });

This can be used on anything that is clickable and you can define individually what items clicked can close or not close the drop-down menu.