Deprecation Guide for Edition: Classic

The edition of Ember prior to Ember Octane is known as Ember Classic. This edition has been deprecated, which means that users must update to Ember Octane. To do this, you must:

• Flip the appropriate optional feature flags for Octane:
• application-template-wrapper: false
• template-only-glimmer-components: true
• Set the edition in the application's package.json to "octane":

{
  "ember": {
    "edition": "octane"
  }
}

For more details on how to upgrade to Octane, see the official upgrade guide. You can also run npx @ember/octanify, which will attempt to update these values automatically.