Question 1

How to use Mustache with Sinatra?

Accepted Answer

Use the mustache-sinatra gem and configure settings via set :mustache, hash. The README provides a diff for upgrades, showing it requires careful setup compared to default Sinatra templating.

Question 2

Mustache vs ERB for Rails templates?

Accepted Answer

Mustache enforces logic-free templates with separate view classes, leading to cleaner markup but more Ruby code. ERB allows embedded Ruby directly in views, which is faster for prototyping but can become messy.

Question 3

How to include partials or reusable components in Mustache?

Accepted Answer

Mustache supports partials via the {{> partial_name }} syntax, but you need to define them as separate template files and manage paths using template_path settings, as described in the Templates section.

Question 4

Can Mustache handle JSON or API response templates?

Accepted Answer

Yes, by setting the template_extension to 'json' and ensuring data methods return appropriate values, but you must handle escaping manually for non-HTML formats since auto-escaping is HTML-focused.

Question 5

What's the performance impact of using Mustache compared to ERB?

Accepted Answer

Mustache may have slight overhead due to its logic-less parsing and class instantiation, but for most web apps, the difference is negligible. The trade-off is cleaner templates versus potential speed in embedded logic engines.

Question 6

How to add custom helpers like date formatting in Mustache?

Accepted Answer

Include a Ruby module with helper methods in your view class, as shown in the Helpers section. For example, define a format_date method and call it in the template via {{format_date}}.

Mustache

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