ember-do-forms/addon/utils/has-only-ember-view.js

ember-do-forms handles the icky parts of forms that you don't want to, and leaves the rest to you.

import { isArray, A } from '@ember/array';

// The classNames on a Component return [] after Ember 2.11,
// but before that it returns ['ember-view'].
export default function hasOnlyEmberView(classNames) {
  if (!isArray(classNames)) {
    return false;
  } else {
    return classNames.length === 1 && A(classNames).includes('ember-view');
  }
}