That's accurately named, though. It's values are the arguments that were passed to the function. A hypothetical parameters object would presumably tell you what

That's accurately named, though. It's values are the arguments that were passed to the function. A hypothetical parameters object would presumably tell you what parameters the function was declared with, e.g. function foo(a, b, c) { return parameters; } would return ['a', 'b', 'c']