This document contains the contents of the specification as of commit 73ad5993a7c8cf8192fa485a91887437fa6b48ab , and should only be used as a historical reference.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.