micro-templating

tmpl.js

// Simple JavaScript Templating
// John Resig - http://ejohn.org/ - MIT Licensed
// http://ejohn.org/blog/javascript-micro-templating/
(function() {
    var cache = {};

    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, function(match){ return match.replace(/\'/g, "\r")})   // this fixes multiple quotes bug
        .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;
    }

    window.tmpl = tmpl;
})();