How does Ember-cli know where to import 'ember-data' from

Question

Ember-cli uses ES6 syntax to import modules.

This is how you import Ember-Data:

import DS from 'ember-data'

How does Ember-cli know where to import Ember-Data from? This case doesn't seem to fit the naming conventions explained in Using Modules and the Resolver docs. (Or maybe I'm missing something.)

jacefarm jacefarm · Accepted Answer · 2014-08-13T05:25:48

The ‘ember-cli-ember-data’ node module adds ember-data to the generated Ember CLI output (via vendor.js). If you look at this module’s index.js, in the EmberCLIED.prototype.included function, you will see the following references to ember-data in the vendor directory:

    EmberCLIED.prototype.included = function included(app) {
      this.app = app;
      var options = {
        exports: {
          'ember-data': [
            'default'
          ]
        }
      };

      if (this.app.env === 'production') {
        this.app.import('vendor/ember-data/ember-data.prod.js', options); // <--
      } else {
        this.app.import('vendor/ember-data/ember-data.js', options);      // <--
      }
    };

That’s how Ember CLI knows where to find ember-data.

How does Ember-cli know where to import 'ember-data' from

2 Answers