Is it possible to define a dynamically named property using object literal in JavaScript?

Question

Consider the following

var a = {foo: \"bar\"};

Equivalent to

var a = {};
a.foo = \"bar\";

Equivalent to

Answer 1

As of CoffeeScript version 1.9.1 this works:

b = "foo"
a = "#{b}": "bar"

It compiles to:

var a, b, obj;

b = "foo";

a = (
  obj = {},
  obj["" + b] = "bar",
  obj
);

Try it.