Mustache can be used for HTML, config files, source code - anything. It works by expanding tags in a template using values provided in a hash or object.
We call it "logic-less" because there are no if statements, else clauses, or for loops. Instead there are only tags. Some tags are replaced with a value, some nothing, and others a series of values. This document explains the different types of Mustache tags.
[2] {{ mustache }} () <https://mustache.github.io/>
[3] mustache/mustache.github.com: The {{official}} website () <https://github.com/mustache/mustache.github.com>