Suggestion: A grid/list at the top with anchor links to each function

[RosemaryOrchard]

A colleague shared this with me today and I love it!

I'd like to suggest adding a reference grid at the top for quick scanning, as well as anchor links for each function to scroll you down to it for more information.

Something like this:

Function	Mutates	Doesn't Mutate
.concat		☑️
.copyWithin	☑️

And so on :)