Simple dropdown component and mixin for Ember. While it is very straightforward to create toggle functionality in Ember with the if-helper, this dropdown will also close on click-out.

Demo available here.

npm install --save-dev ember-rl-dropdown

This addon does not provide any css for the dropdown, but it should work well with frameworks such as Twitter Bootstrap (see example below).

<!-- Twitter Bootstrap dropdown menu example -->

{{#rl-dropdown-container class="dropdown"}}
  {{#rl-dropdown-toggle class="btn btn-default"}}
    Toggle <span class="caret"></span>
  {{/rl-dropdown-toggle}}

  {{#rl-dropdown tagName="ul" class="dropdown-menu" closeOnChildClick="a:link"}}
    <li><a href="#">Link 1</a></li>
    <li><a href="#">Link 2</a></li>
    <li><a href="#">Link 3</a></li>
  {{/rl-dropdown}}
{{/rl-dropdown-container}}

The component tagnames and classes can be altered to work with your favorite framework or your own custom css. closeOnChildClick may be set to a jQuery selector for child elements that should cause the dropdown to close when clicked. The default behavior is for the dropdown to remain visible when the user interacts with its child elements. Set it to true if any child element should close the dropdown.

When integrating dropdown functionality in your own components, you may prefer to use the mixin instead of using the dropdown components. Be sure to add the rl-dropdown-toggle class to your dropdown toggle element, and to add the rl-dropdown class to your dropdown element. You can send toggleDropdown, closeDropdown and openDropdown events to toggle, close or open the dropdown.

// app/components/user-controls.js
import Ember from 'ember';
import DropdownComponentMixin from 'ember-rl-dropdown/mixins/rl-dropdown-component';

export default Ember.Component.extend(DropdownComponentMixin, {
  // Some additional custom behaviour
});

<!-- app/templates/components/user-controls.hbs -->

<!-- Be sure to add the rl-dropdown-toggle class to your dropdown toggle element -->
<button class="rl-dropdown-toggle" {{action "toggleDropdown"}}>User controls</button>

{{#if dropdownExpanded}}
  <!-- Be sure to add the rl-dropdown class to your dropdown element -->
  <div class="user-controls-dropdown rl-dropdown">
    ...
    <a class="close-btn" {{action "closeDropdown"}}>Close</a>
  </div>
{{/if}}