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iron-a11y-keys-behavior

A behavior that enables keybindings for greater a11y

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Published on NPM Build status Published on webcomponents.org

<iron-a11y-keys-behavior>

Polymer.IronA11yKeysBehavior provides a normalized interface for processing keyboard commands that pertain to WAI-ARIA best practices. The element takes care of browser differences with respect to Keyboard events and uses an expressive syntax to filter key presses.

See: Documentation, Demo.

Usage

Installation

npm install --save @polymer/iron-a11y-keys-behavior

In a Polymer 3 element

import {PolymerElement, html} from '@polymer/polymer';
import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class.js';
import {IronA11yKeysBehavior} from '@polymer/iron-a11y-keys-behavior/iron-a11y-keys-behavior.js';

class SampleElement extends  extends mixinBehaviors([IronA11yKeysBehavior], PolymerElement) {
  static get template() {
    return html`
      <pre>[[pressed]]</pre>
    `;
  }

  static get properties() {
    return {
      pressed: {type: String, readOnly: true, value: ''},
      keyBindings: {
        'space': '_onKeydown', // same as 'space:keydown'
        'shift+tab': '_onKeydown',
        'enter:keypress': '_onKeypress',
        'esc:keyup': '_onKeyup'
      }
    }
  }

  function _onKeydown: function(event) {
    console.log(event.detail.combo); // KEY+MODIFIER, e.g. "shift+tab"
    console.log(event.detail.key); // KEY only, e.g. "tab"
    console.log(event.detail.event); // EVENT, e.g. "keydown"
    console.log(event.detail.keyboardEvent); // the original KeyboardEvent
  }
}
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:

Installation

git clone https://github.com/PolymerElements/iron-a11y-keys-behavior
cd iron-a11y-keys-behavior
npm install
npm install -g polymer-cli

Running the demo locally

polymer serve --npm
open http://127.0.0.1:<port>/demo/

Running the tests

polymer test --npm

Compatibility

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Version

Dependencies

  • @polymer/polymer#^3.0.0
Released
2018-09-14
Maturity
IMPORTED
License
BSD 3-clause "New" or "Revised" License

Compatibility

Framework
Polymer 1.0+
Polymer 3.0+
Polymer 2.0+ in 2.1.1
Browser
Browser Independent

iron-a11y-keys-behavior - Vaadin Add-on Directory

A behavior that enables keybindings for greater a11y iron-a11y-keys-behavior - Vaadin Add-on Directory
[![Published on NPM](https://img.shields.io/npm/v/@polymer/iron-a11y-keys-behavior.svg)](https://www.npmjs.com/package/@polymer/iron-a11y-keys-behavior) [![Build status](https://travis-ci.org/PolymerElements/iron-a11y-keys-behavior.svg?branch=master)](https://travis-ci.org/PolymerElements/iron-a11y-keys-behavior) [![Published on webcomponents.org](https://img.shields.io/badge/webcomponents.org-published-blue.svg)](https://webcomponents.org/element/@polymer/iron-a11y-keys-behavior) ## <iron-a11y-keys-behavior> `Polymer.IronA11yKeysBehavior` provides a normalized interface for processing keyboard commands that pertain to [WAI-ARIA best practices](http://www.w3.org/TR/wai-aria-practices/#kbd_general_binding). The element takes care of browser differences with respect to Keyboard events and uses an expressive syntax to filter key presses. See: [Documentation](https://www.webcomponents.org/element/@polymer/iron-a11y-keys-behavior), [Demo](https://www.webcomponents.org/element/@polymer/iron-a11y-keys-behavior/demo/demo/index.html). ## Usage ### Installation ``` npm install --save @polymer/iron-a11y-keys-behavior ``` ### In a Polymer 3 element ```js import {PolymerElement, html} from '@polymer/polymer'; import {mixinBehaviors} from '@polymer/polymer/lib/legacy/class.js'; import {IronA11yKeysBehavior} from '@polymer/iron-a11y-keys-behavior/iron-a11y-keys-behavior.js'; class SampleElement extends extends mixinBehaviors([IronA11yKeysBehavior], PolymerElement) { static get template() { return html`
[[pressed]]
`; } static get properties() { return { pressed: {type: String, readOnly: true, value: ''}, keyBindings: { 'space': '_onKeydown', // same as 'space:keydown' 'shift+tab': '_onKeydown', 'enter:keypress': '_onKeypress', 'esc:keyup': '_onKeyup' } } } function _onKeydown: function(event) { console.log(event.detail.combo); // KEY+MODIFIER, e.g. "shift+tab" console.log(event.detail.key); // KEY only, e.g. "tab" console.log(event.detail.event); // EVENT, e.g. "keydown" console.log(event.detail.keyboardEvent); // the original KeyboardEvent } } 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: ### Installation ```sh git clone https://github.com/PolymerElements/iron-a11y-keys-behavior cd iron-a11y-keys-behavior npm install npm install -g polymer-cli ``` ### Running the demo locally ```sh polymer serve --npm open http://127.0.0.1:/demo/ ``` ### Running the tests ```sh polymer test --npm ```
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