es6 对象的扩展

var foo = 'aaaa';
var baz = {foo};  //{foo: 'aaaa'}
foo = 'bbbb';
baz;  //{foo: 'bbbb'}

function f(x, y){
  return {x, y}
}

function f(x, y) {
　　return { x: x, y: y };
}

var o ={
  f(){
    alert(1)
  }
}

var o = {
  f: function f() {
    alert(1);
  }
};

var borth = '1987-02-02'
var Person = {
  name: 'zhangsan',
  borth,
  hello(){
    console.log('my name is ' + this.name)
  }
}

==

var borth = '1987-02-02';
var Person = {
  name: 'zhangsan',
  borth: borth,
  hello: function hello() {
    console.log('my name is ' + this.name);
  }
};

 模块模式

var ms = {}

function getItem(key){
  return key in ms? ms[key]: null;
}

function setItem(key, value){
  ms[key] = value;
}

function clear(){
  ms = {}
}

module.export = {getItem, setItem, clear}
==
module.export = {
    getItem: getItem,
    setItem: setItem,
    clear: clear
}

var cart = {
  _wheels: 4,
  get wheels(){
    console.log('get')
    return this._wheels;
  },
  set wheels(value){
    console.log('set');
    this._wheels = value;
  }
}

var obj = {
  class(){}
}
==
var obj = {
  class: function _class() {}
};

var obj = {
  *m(){
    yield 'hello'
  }
}
==
var obj = {
  m: regeneratorRuntime.mark(function m() {
    return regeneratorRuntime.wrap(function m$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            _context.next = 2;
            return 'hello';

          case 2:
          case 'end':
            return _context.stop();
        }
      }
    }, m, this);
  })
};