link buttons

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'button',
  attributeBindings: ['href', 'target'],
  
  init() {
    this._super(...arguments);
    if (this.get('href')) {
      this.set('tagName', 'a');
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#my-component}}
  button
{{/my-component}}
<br>
{{#my-component href="google.com"}}
  button
{{/my-component}}
<br>

templates.components.my-component.hbs

{{yield}}

twiddle.json

{
  "version": "0.8.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}