This document contains the contents of the specification as of commit fcec122a548f8007d942d4ed5caeff22ab13abf5 , and should only be used as a historical reference. This commit may not have even been merged into the specification.
Do not attempt to implement this version of the specification. Do not reference this version as authoritative in any way. Instead, see https://tc39.github.io/ecma262 for the living specification.