javascript动态创建对象的属性详解

var obj = {
  property1: '',
  property2: ''
  };

obj.property1 = 'some value';
obj.property2 = 'some other value';

var obj = {
  property1: '',
  property2: '',
  foo : function(){
      console.log(obj.property1);
  }};

var obj = {
  property1: '',
  property2: ''
  };

obj['property_name'] = 'some_value';

// Example of an object property added with defineProperty with a data property descriptor
Object.defineProperty(obj, "property3", {value : 'some value',
              writable : true,
              enumerable : true,
              configurable : true});
// 'property3' property exists on object obj and its value is 37