micro template

micro-template.js

'use strict';
var _cache = {};
var microTemplate = function(str, data) {
  var func = _cache[str];
  if (!func) {
    var strFunc =
    "var p=[],print=function(){p.push.apply(p,arguments);};" +
          "with(obj){p.push('" +

    //str.replace(/[\r\t\n]/g, " ")
    str.replace(/[\r]/g, "::BR::")     //replace white spaces to special ones
      .replace(/[\n]/g, "::BN::")
      .replace(/[\t]/g, "::BT::")
      .replace(/'(?=[^%]*%>)/g, "\t")
      .split("'").join("\\'")
      .split("\t").join("'")
      .replace(/<%=(.+?)%>/g, "',$1,'")
      .split("<%").join("');")
      .split("%>").join("p.push('") + "');}return p.join('');";

    func = new Function("obj", strFunc);
    _cache[str] = func;
  }
  var output = func(data)
    .replace(/::BR::/g, "\r")    // recover white spaces
    .replace(/::BN::/g, "\n")
    .replace(/::BT::/g, "\t");
  return output;
};

module.exports = microTemplate;