Dynamic computed property path - v01

components.my-component.js

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

export default Ember.Component.extend({
  
  magicName: 'foo',
  
  foo: 'I am foo',
  bar: 'I am bar (not really necessary)',  
  
  didReceiveAttrs() {
    this._super(...arguments);
    Ember.defineProperty(this, 'magicValue', computed(this.get('magicName'), function() {
      let name = this.get('magicName');
      let value = this.get(name);
      return value;
    }));
  },
             
  
  actions: {
    changeFooValue() {
   		this.set('foo', 'This is different value of foo and should be reflected in magicValue as well');
    } 
  }
});

controllers.application.js

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

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
});

templates.application.hbs

{{my-component}}

templates.components.my-component.hbs

<h1>Dynamic computed property path</h1>

<ul>
<li>foo: {{foo}}</li>
<li>bar: {{bar}}</li>
<li>magicName: {{magicName}}</li>
<li>magicValue: {{magicValue}}</li>
</ul>

<button {{action "changeFooValue"}}>Change foo value</button>

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"
  }
}