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

For historical interest, also see section 4.2 Evaluation Order of JavaScript 1.1 Language Specification (Brendan Eich, C. Rand Mckinney, 11/18/96).

In a function or constructor call, one or more argument expressions may appear within the parentheses, separated by commas. Each argument expression is fully evaluated before any part of any argument expression to its right is evaluated.