Ember-Cli vendor.js initial download - Showing a loading message

What is the ember-cli way of displaying a static message to indicate that the emper-app itself (vendor.js) is loading (being downloaded)?

Current situation

• Index.html is blank pre vendor.js download

Goal

• Display something to the user while vendor.js is downloading to avoid making them leave the page while its loading.

Solution idea (not yet tested, not yet known if it's a good solution)

1. Create a named div in the index.html file


2. Hide it on ember initialization