Template.JS - template engine

template.js

/**
 * Template.JS v 0.1
 * @author Andreev Sergey
 * @corp USERSTORY
 */
(function($) {
	/**
	 * Template engine class
	 * @param {string} tpl template name
	 * @param {array} o @optional options array
	 */
	Template = (function(){
		function Template(tpl, o) {
			var
				html,
				options,
				prefix;

				tpl = (typeof tpl === "undefined")? false : tpl;
				o = (typeof o === "undefined")? false : o;
				//init
				options = {
					selector: o? o.selector : '#',
					prefix: o? o.prefix : 'tpl-',
					letterLeft: o? o.letterLeft : '{',
					letterRight: o? o.letterLeft : '}',
					isDefaultParams: o? o.isDefaultParams : true,
					isRemoveEmptyParams: o? o.isRemoveEmptyParams: true
				};

				tplElm = options.selector + options.prefix + tpl;

				// private functions
				var setHtml = function() {
					html = $(tplElm).clone().html();
				}
				var setParam = function(param, value) {
					if (param && value) {
						var find = options.letterLeft + param + '\\|?.*' + options.letterRight;
						html = html.replace(new RegExp(find, 'g'), value);
					}
				};
				var setDefaultParams = function() {
					var find = options.letterLeft + '..*\\|(.*)' + options.letterRight;
					html = html.replace(new RegExp(find, 'g'), '$1');
				}
				var removeEmptyParams = function() {
					var find = options.letterLeft + '..*\\|?.*' + options.letterRight;
					html = html.replace(new RegExp(find, 'g'), '');
				}



				tpl && setHtml();
				options.isDefaultParams && setDefaultParams();
				options.isRemoveEmptyParams && removeEmptyParams();

				this.setTpl = function(id) {
					setHtml();
					return this;
				}

				/**
				 * Set HTML string template
				 * @param {string} tpl
				 */
				this.setHtml = function(tpl) {
					html = tpl;
					return this;
				}

				/**
				 * Set param or params
				 * @param {string|array} param1
				 * @param {string} param2 @optional
				 */
				this.set = function(param1,param2) {
					if (typeof param1 === 'object') {
						$.each(param1, function(key, value) {
							setParam(key, value);
						});
					} else {
						setParam(param1,param2);
					}
					return this;
				}
				this.get = function() {
					return $(this.getHtml());
				}
				this.getHtml = function() {
					return html;
				}
		}
		return Template;
	})();
})(jQuery)

<script type="text/template" id="tpl-templateName">
    <div>
        asd <br>
        {asd} <br>
        {asd|123} <br>
        {asd|} <br>
        {} <br>
        {asd1}
    </div>
</script>

<script>
$(function(){
    asd = new Template('templateName').set('asd','val').get();
asd = new Template('templateName').set('asd','val').getHtml();
})
</script>