Is it necessary to convert arguments to Array before calling apply?

Question

Are there any browser restrictions or any other issues that prevents me from doing:

fn.apply(this, arguments);

versus:

fn.apply(this, Array.prototype.slice.call(arguments));

I know that apply takes a "true" Array as second argument, but passing an arguments collection seems to work just as good. or...?

Answer 1

According to the MDN, it "Calls a function with a given this value and arguments provided as an array (or an array like object)". Given that arguments is an array-like object, there shouldn't be any restriction on using it.

In fact, the description explicitly says arguments is a valid parameter.