@polymer/paper-listbox


<paper-listbox>

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

``html

Item 1
Item 2

`

An initial selection can be specified with the selected attribute.

`html

Item 1
Item 2

`

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

`html

Item 1
Item 2

`

$3

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 | {} |

$3

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.

See: Documentation,
Demo.

Usage

$3


`
npm install --save @polymer/paper-listbox
`

$3

`html

item 1

item 2

item 3

`

$3

`js
import {PolymerElement, html} from '@polymer/polymer';
import '@polymer/paper-listbox/paper-listbox.js';

class SampleElement extends PolymerElement {
static get template() {
return html

;
}
}
customElements.define('sample-element', SampleElement);
`

Contributing

If you want to send a PR to this element, here are
the instructions for running the tests and demo locally:

$3

`sh
git clone https://github.com/PolymerElements/paper-listbox
cd paper-listbox
npm install
npm install -g polymer-cli
`

$3

`sh
polymer serve --npm
open http://127.0.0.1:/demo/
`

$3

`sh
polymer test --npm
``