Load JSON File

components.load-json.js

import Ember from 'ember';

export default Ember.Component.extend({
  rawData: '',
  actions: {
    loadFile(files, resetInput) {
      let reader = new FileReader();

      reader.onload = (event) => {
        Em.run(() => {
          let data = event.target.result;
          
          console.log('data', data);
          this.set('rawData', data);

          resetInput();
        });
      };

      reader.readAsDataURL(files[0]);
    },
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

{{load-json}}

templates.components.load-json.hbs

{{#x-file-input action=(action "loadFile") accept="application/json"}}
	<button>Load JSON File</button>
{{/x-file-input}}

<hr>

{{#if rawData}}
	The rawData is: 

	<textarea style="width: 100%; height: 300px">{{rawData}}</textarea>
{{/if}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3",
    "emberx-file-input": "1.2.1"
  }
}