John Resig's MicroTemplating with Curly Braces

microtemplating.js

/*

This comes directly from John Resig's MicroTemplating, but with {%= %} instead of <%= %> for the dynamic sections.
http://ejohn.org/blog/javascript-micro-templating/

This lets you use just natural Javascript, along with whatever JS library you're using, and can be inside of a Rails erb template, or whatever.

Used with a template inside the HTML of the page:

<script type="text/html" id="user_tmpl">

<ul>
{% $.each( users, function(){ %}
    <li><a href="{%= this.url %}">{%= this.name %}</a></li>
{% }); %}
</ul>

</script>

*/

// Simple JavaScript Templating
// John Resig - http://ejohn.org/ - MIT Licensed
// Modified to use curly braces.
(function(){
	var cache = {};
	
	this.tmpl = function tmpl(str, data){
		// Figure out if we're getting a template, or if we need to
		// load the template - and be sure to cache the result.
		var fn = !/\W/.test(str) ?
			cache[str] = cache[str] ||
				tmpl(document.getElementById(str).innerHTML) :
			
			// Generate a reusable function that will serve as a template
			// generator (and which will be cached).
			new Function("obj",
				"var p=[],print=function(){p.push.apply(p,arguments);};" +
				
				// Introduce the data as local variables using with(){}
				"with(obj){p.push('" +
				
				// Convert the template into pure JavaScript
				str
					.replace(/[\r\t\n]/g, " ")
					.split("{%").join("\t")
					.replace(/((^|%})[^\t]*)'/g, "$1\r")
					.replace(/\t=(.*?)%}/g, "',$1,'")
					.split("\t").join("');")
					.split("%}").join("p.push('")
					.split("\r").join("\\'")
			+ "');}return p.join('');");
		
		// Provide some basic currying to the user
		return data ? fn( data ) : fn;
	};
})();