模板引擎

template.js

String.prototype.render = function(obj) {
  return this.replace(/\$\{(\w+|\w+\.\w+)\}/g, match => {
    var keys = match.replace('${', '').replace('}', '').split('.')
    return keys.reduce((acc, cv) => acc[cv], obj)
  })
}

String.prototype.render = function (obj) {
    with(obj) {
        return eval('`' + this + '`')
    }
}

String.prototype.render = function(employee) {
  var str = this + '';
  return str.replace(/\$\{(\w+|\w+\.\w+)\}/g, function(match) {
    var key = match.replace('${', '').replace('}', '');
    if (/\./g.test(key)) {
      var key = key.split('.');
      var value = employee;
      for( var i =0; i<key.length; i++ ){
        value = value[key[i]]
      }
      return value;
    } else {
      return employee[key]
    }
  })
}