What is the order of evaluation for function arguments in Javascript?

Question

According to my tests it is always left-to-right

>> console.log( console.log(1), console.log(2) );
1
2
undefined undefined

but I can\

Answer 1

It's defined here:

The production ArgumentList : ArgumentList , AssignmentExpression is evaluated as follows:

1. Let precedingArgs be the result of evaluating ArgumentList.
2. Let ref be the result of evaluating AssignmentExpression.
3. Let arg be GetValue(ref).
4. Return a List whose length is one greater than the length of precedingArgs and whose items are the items of precedingArgs, in order, followed at the end by arg which is the last item of the new list.

Read here: http://es5.github.com/#x11.2.4

When a function is invoked, the passed-in arguments are evaluated from left to right.