> On Apr 11, 2016, at 9:29 PM, Gomer Thomas <gomer at gomert-consulting.com> wrote: > > I found the statement "We use the notation x@[[y]] to refer to > internal slots of an object", but I could not find a definition of what an > "internal slot" is. That term is defined in the ECMAScript specification. http://www.ecma-international.org/ecma-262/6.0/ — Darin