This document contains the contents of the specification as of commit a329eefaca95fb1f91cf3828249e54f13b27e095 , and should only be used as a historical reference.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.