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@polymer/iron-a11y-keys-behavior
Advanced tools
Readme
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.
npm install --save @polymer/iron-a11y-keys-behavior
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);
If you want to send a PR to this element, here are the instructions for running the tests and demo locally:
git clone https://github.com/PolymerElements/iron-a11y-keys-behavior
cd iron-a11y-keys-behavior
npm install
npm install -g polymer-cli
polymer serve --npm
open http://127.0.0.1:<port>/demo/
polymer test --npm
FAQs
A behavior that enables keybindings for greater a11y.
We found that @polymer/iron-a11y-keys-behavior demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 11 open source maintainers collaborating on the project.
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