Thank you for the explanation!

Is this what you are looking for?
Javascript Environment on Codewars

I added a little blurb at the end of the description for the starting values. Hopefully that makes it a little more clear.

It assumes that the starting values of the sequence are [0,1]

• fib(0) = 0;
• fib(1) = 1;
• fib(2) = 1;
• fib(3) = 2;

yep, all changed

Ah-- cool. I do that sometimes ;P
If you click "Train Again", there's a tab on the left with your "Past Solutions". I often copy my old code out of there, paste it into the box and clean it up. ^^

Yeah... another bug. Kinda wrote this kata in haste, I'm afraid. Thanks for bearing with me.

I've fixed the bug and added an explanation of what to expect as byteLength values.

I've added some description to the int parameter explanation. Does it make things clearer?

As for negative numbers, you're spot on. ;P

No; that was a bug. Thanks for finding it! ;P

A "byte" is basically a group of bits. So the byte length is how long the byte is, or the number of bits that make up the byte.

Thanks, Joey. I appreciate it.