Keydown Example

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
    handleKeyDown(evt) {
      console.log(evt);
    }
  }
});

templates.application.hbs

<h2><code>\{{input}}</code></h2>

{{input
    value=foo
    key-down=(action "handleKeyDown")}}

<h2><code>&lt;input&gt;</code></h2>

<input
    value={{foo}}
    onInput={{action (mut foo) value="target.value"}}
    onKeyDown={{action "handleKeyDown"}}>

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}