micro template engine

micro-template-engine.js

(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;
  };
})();