How do JavaScript engines create variables? -

consider:

var s1 = { a: 1, b: s1.a }; alert(s1.b); // uncaught typeerror: cannot read property 'a' of undefined

can shed lite on inner workings of javascript engines why case?

currently i'm forced use:

var s2 = {     a: {         a: 1     },     b: {         a: function () {  homecoming s2.a.a}     } };  alert(s2.b.a()); // 1

inside of declaration:

var s1 = { a: 1, b: s1.a };

s1 not yet defined until end of info declaration, cannot referred within of info declaration. how javascript works.

you instead:

var s1 = { a: 1 }; s1.b = s1.a;

javascript

Jaimee