Простейший шаблонизатор

teplater.js

/**
 * Using yajt('<div class="$class_name$">$data$</div>', {class_name: 'main', data: 'Hello, world'})
 * @param  {String} template string
 * @param  {Object} data     key-value data storage
 * @return {String}
 */
function yajt (template, data) {
	"use strict";
	var res;
	res = template.replace(/\$([^\$]+)?\$/g, function (match_string, param_name) {
		return data[param_name];
	});
	return res;
}