Demo and API docs

<paper-listbox>

Material design: Menus

<paper-listbox> implements an accessible listbox control with Material Design styling. The focused item is highlighted, and the selected item has bolded text.

<paper-listbox>
  <paper-item>Item 1</paper-item>
  <paper-item>Item 2</paper-item>
</paper-listbox>

An initial selection can be specified with the selected attribute.

<paper-listbox selected="0">
  <paper-item>Item 1</paper-item>
  <paper-item>Item 2</paper-item>
</paper-listbox>

Make a multi-select listbox with the multi attribute. Items in a multi-select listbox can be deselected, and multiple item can be selected.

<paper-listbox multi>
  <paper-item>Item 1</paper-item>
  <paper-item>Item 2</paper-item>
</paper-listbox>

Styling

The following custom properties and mixins are available for styling:

Custom property	Description	Default
--paper-listbox-background-color	Menu background color	--primary-background-color
--paper-listbox-color	Menu foreground color	--primary-text-color
--paper-listbox	Mixin applied to the listbox	{}

Accessibility

<paper-listbox> has role="listbox" by default. A multi-select listbox will also have aria-multiselectable set. It implements key bindings to navigate through the listbox with the up and down arrow keys, esc to exit the listbox, and enter to activate a listbox item. Typing the first letter of a listbox item will also focus it.

Notable breaking changes between 1.x and 2.x (hybrid):

IronSelectableBehavior and IronMultiSelectableBehavior, which are used by paper-listbox, introduce multiple breaking changes. Please see the README for those behaviors for more detail.