[](https://travis-ci.org/PolymerElements/iron-a11y-keys-behavior) _[Demo and API docs](https://elements.polymer-project.org/elements/iron-a11y-keys-behavior)_ ##Polymer.IronA11yKeysBehavior `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. Use the `keyBindings` prototype property to express what combination of keys will trigger the callback. A key binding has the format `"KEY+MODIFIER:EVENT": "callback"` (`"KEY": "callback"` or `"KEY:EVENT": "callback"` are valid as well). Some examples: ```javascript keyBindings: { 'space': '_onKeydown', // same as 'space:keydown' 'shift+tab': '_onKeydown', 'enter:keypress': '_onKeypress', 'esc:keyup': '_onKeyup' } ``` The callback will receive with an event containing the following information in `event.detail`: ```javascript _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 } ``` Use the `keyEventTarget` attribute to set up event handlers on a specific node. See the [demo source code](https://github.com/PolymerElements/iron-a11y-keys-behavior/blob/master/demo/x-key-aware.html) for an example.