Handlebars supports the idea of helpers, which are special custom functions you can write to perform some special logic from within the template during runtime. This will encourage developers to migrate the common presentation logic present in views into helpers and reuse them, thereby adding much more readability to the views. A great example of a helper would be the date string formatter we've been using. Helpers can be registered globally and made available to every template file, or they can be defined per view and passed to the template on an as-needed basis as part of the viewModel.