Simple output with values

controllers.application.js

import Ember from 'ember';
import EmberObject, { computed } from '@ember/object';

const Person = EmberObject.extend({
  // these will be supplied by `create`
  firstName: null,
  lastName: null,

  fullName: computed('firstName', 'lastName', function() {
    return `${this.firstName} ${this.lastName}`;
  })
});



export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  outputValue: null,
  
  actions: {
    output() {

    let ironMan = Person.create({
      firstName: this.firstName,
      lastName:  this.lastName
    });

      this.set('outputValue', ironMan.fullName);
    //console.log(ironMan.fullName); // "Tony Stark"
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
First name: {{ input value=firstName}}
<br>
Last name: {{ input value=lastName}}
<br>
Full name: {{ input value=fullName}}
Value: {{outputValue}}
<button {{action "output"}}>Output</button>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}