Question

I’ve seen that can use object literal notation to define an object with a getter like so:

var foo = {
            get bar() { return 3; }
          }

Is there some object literal syntax that allows me to set other property descriptor attributes of “bar” above, such as ‘enumerable’?

Or, is ‘get/set‘ the only property descriptor attributes supported for ECMAScript5 object literal notation?

Answer 1

A good question…but I don’t think it can be done.

get and set are defined as operators that act the same way as property descriptors:

Object.defineProperty(foo, "bar", {value : 3,  
                                   writable : true,  
                                   enumerable : true,  
                                   configurable : true,
                                   get : function(){ return value; },  
                                   set : function(newValue){ value = newValue;}
                                  });  

Looking through the javascript operator list I don’t see anything similar for other descriptors apart from get and set.