Example mut and api consumption

components.api-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  didInsertElement() {
    this.get('registerAPI')({
      open() { 
        window.alert('Action from component');
      }
    })
  }
});

components.x-button.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'button'
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  api: {
    open: () => {
      window.alert('action from controller');
    }
  }
});

templates.application.hbs

<h1>Example Mut + registerApi Pattern</h1>

{{#x-button
  click=(action api.open)
}}
  Click
{{/x-button}}

{{api-component
  registerAPI=(action (mut api))
}}

templates.components.api-component.hbs

{{yield}}

templates.components.x-button.hbs

{{yield}}

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"
  }
}