Sinaps Template is a template engin similar to Jinja2 and Twig using PEGjs modified Javascript ES5.1 parser. So every expression is JS compatible and no surprise is awaiting you.
npm install --save sinaps-template
or
<script src="sinaps-template.min.js"></script>
An environment instance will be your entry point for all template compilation and rendering.
var env = new Environment();
var template = env.compileString('Hello {{ world }}');
console.log(template({foo: 'World'}).output); // "Hello World"
console.log(template({foo: 'Peter'}).output); // "Hello Peter"