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

No.

There is no way to do it using object literal notation.

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UPDATE: According to the ECMAScript standard 6.0 you are now able to do the following:

var b = 'foo';
var a = { [b]: 'bar' };

console.log( a.foo );  // "bar"

However, this solution won't work in old browsers, which do not support ES6.