String.prototype.template.js

String.prototype.template = function (scopeEval) {
  // Andrea Giammarchi - WTFPL License
  var
    re = /\$\{([\S\s]*?)\}/g,
    evaluate = [],
    i = 0,
    m
  ;
  while (m = re.exec(this)) {
    evaluate.push(
      this.slice(i, re.lastIndex - m[0].length),
      scopeEval('(' + m[1] + ')')
    );
    i = re.lastIndex;
  }
  evaluate.push(this.slice(i));
  // Function is needed to opt out from possible "use strict" directive
  return evaluate.join("")
};

var name = "Andrea"

// es3
console.log("Hello ${ name }".template(function(s) { return eval(s) }) == "Hello Andrea")// es3

// es6
console.log("Hello ${ name }" == "Hello Andrea")

// es3 -> es6
// sed s/\.template\(function\(s\) \{ return eval\(s\) \}\)//g