The 11th edition of the ECMAScript® Language Specification, ES2020, has been officially approved and published to: http://www.ecma-international.org/publications/standards/Ecma-262.htm
New features include:
- Optional Chaining
- Nullish coalescing
Most of, if not all of these proposed features should already be present in modern day browsers. In fact most of these features have individually been approved for a while now (and part of that approval is to have implementations available). What’s new is that the specification as a whole has now been approved and is the official current standard for the language.
More on those features and other completed proposals available here: https://github.com/tc39/proposals/blob/master/finished-proposals.md