How to make a Bootstrap 3 dropdown menu open by default when it is inside a collapsed navbar

Question

I\'m trying to make my dropdown menu open by default when my collapsed navbar is opened. Here is a fiddle to show my code so far.

Currently, if you

Answer 1

You can add a javascript function to your code:

<script>
	$(document).ready(function(){
		$(".dropdown").hover(            
		function() {
			$('.dropdown-menu', this).stop( true, true ).slideDown("fast");
			$(this).toggleClass('open');        
		},
		function() {
			$('.dropdown-menu', this).stop( true, true ).slideUp("fast");
			$(this).toggleClass('open');       
		}
		);
	});
</script>

you can see the example and demo in dtc-eng

Answer 2

Just remove data-toggle="dropdown"

Answer 3

According to the docs for Bootstrap v3, you can use Javascript to hook on the collapse events:

$(function () {
  $('#bs-example-navbar-collapse-1').on('shown.bs.collapse', function(e) {
    $('#my_dropdown').dropdown('toggle', 'open').hide();
    console.log('shown:', e);
  });
});

I'm not sure the result is what you want, because while the "toggle" button is hidden, the submenu is still indented. Instead of trying to bend Bootstrap that much, perhaps a better solution is having 2 menus with the desired structure for each screen size and show one or another based on media queries.

Fiddle: http://jsfiddle.net/scardine/tw82o88y/

Answer 4

You can add css style for responsive mobile display. paste it into your css file:

@media only screen and (max-width:480px){
    .dropdown-menu{
        display: block;
        position: static;
        background-color:transparent;
        border:0 none;
        box-shadow:none;
        margin-top:0;
        position:static;
        width:100%;
    }
    .navbar-nav .dropdown-menu > li > a, 
    .navbar-nav .dropdown-menu .dropdown-header {
        padding:5px 15px 5px 25px;
    }
    .navbar-nav .dropdown-menu > li > a{
        line-height:20px;
    }
    .navbar-default .navbar-nav .dropdown-menu > li > a{    
        color:#777;
    }
}

you can see it in its entirety here : Demo jsfiddle

hope that helps.