JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://github.com/janl/mustache.js/raw/master/mustache.js"></script>

JavaScript

var view = {
  title: "Joe",
  calc: function() {
     return function(text) {return (2 + 4)}
  }
}

    var template = "{{title}} spends {{#calc}} {{/calc}}";
var html = Mustache.to_html(template, view);
alert(html);