ng-bootstrap-submenu

Demo: plnkr

• ng-bootstrap-submenu.min.css
• ng-bootstrap-submenu.min.js

Add the bootstrapSubmenu module dependency.

angular.module('myApp', ['bootstrapSubmenu']);

Use the directive (with ng-repeat if you have multiple dropdowns). Set the menu-item attribute to an object with the following properties:

• href = the link for the item (only necessary for items with no children).
• display = the text displayed for the item.
• children = an array of sub-items (may be empty).

Html:

<div ng-controller="menuController as vm">
    <nav class="navbar navbar-default">
        <div class="navbar-header">
            <button class="navbar-toggle" type="button" data-toggle="collapse" data-target=".navbar-collapse">
                <span class="sr-only">Toggle navigation</span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
    
            <a class="navbar-brand">ng-bootstrap-submenu</a>
        </div>

        <div class="collapse navbar-collapse">
            <ul class="nav navbar-nav">
                <bootstrap-submenu ng-repeat="item in vm.menuItems" menu-item="item">
                </bootstrap-submenu>
            </ul>
        </div>
    </nav>
</div>

Javascript:

angular.module('myApp', ['bootstrapSubmenu']);

angular
    .module('myApp')
    .controller('menuController', menuController);
        
function menuController() {
    var vm = this; 
    vm.menuItems = [
        { display: 'Dropdown Item 1', href: '#', children: [
            { display: 'Child 1', href: '#', children: [
            { display: 'Sub 1', href: '#sub1', children: []},
            { display: 'Sub 2', href: '#sub2', children: []}]},
            { display: 'Child 2', href: '#child2', children: []}]},
        { display: 'Dropdown Item 2', href: '#dropdown2', children: []},
        { display: 'Dropdown Item 3', href: '#', children: [
            { display: 'Child 3', href: '#child3', children: []}]}
        ];
});