demo.js

var block = require('yayo/block')
var fs = require('fs')

function getTemplate(name) {
  return fs.readFileSync('./tmpl/'+name+'.tmpl', 'utf8')
}

var layout = new block({
    template: getTemplate('layout')
})

var header = new block({
    template: getTemplate('header'),
    id: "header"
})

var footer = new block({
    template: getTemplate('footer'),
    id:"footer"
})


layout.setBlock(header)
layout.setBlock(footer)

console.log(String(layout))