Finished proposals are proposals that have reached stage 4, and are included in the latest draft of the specification.
| Proposal | Author | Champion(s) | TC39 meeting notes | Expected Publication Year |
|---|---|---|---|---|
Array.prototype.includes | Domenic Denicola | Domenic Denicola Rick Waldron | November 2015 | 2016 |
| Exponentiation operator | Rick Waldron | Rick Waldron | January 2016 | 2016 |
Object.values/Object.entries | Jordan Harband | Jordan Harband | March 2016 | 2017 |
| String padding | Jordan Harband | Jordan Harband Rick Waldron | May 2016 | 2017 |
Object.getOwnPropertyDescriptors | Jordan Harband Andrea Giammarchi | Jordan Harband Andrea Giammarchi | May 2016 | 2017 |
| Trailing commas in function parameter lists and calls | Jeff Morrison | Jeff Morrison | July 2016 | 2017 |
| Async functions | Brian Terlson | Brian Terlson | July 2016 | 2017 |
| Shared memory and atomics | Lars T Hansen | Lars T Hansen | January 2017 | 2017 |
| Lifting template literal restriction | Tim Disney | Tim Disney | March 2017 | 2018 |
s (dotAll) flag for regular expressions | Mathias Bynens | Brian Terlson Mathias Bynens | November 2017 | 2018 |
| RegExp named capture groups | Gorkem Yakin Daniel Ehrenberg | Daniel Ehrenberg Brian Terlson Mathias Bynens | November 2017 | 2018 |
| Rest/Spread Properties | Sebastian Markbåge | Sebastian Markbåge | January 2018 | 2018 |
| RegExp Lookbehind Assertions | Gorkem Yakin Nozomu Katō Daniel Ehrenberg | Daniel Ehrenberg Mathias Bynens | January 2018 | 2018 |
| RegExp Unicode Property Escapes | Mathias Bynens | Brian Terlson Daniel Ehrenberg Mathias Bynens | January 2018 | 2018 |
Promise.prototype.finally | Jordan Harband | Jordan Harband | January 2018 | 2018 |
| Asynchronous Iteration | Domenic Denicola | Domenic Denicola | January 2018 | 2018 |
Optional catch binding | Michael Ficarra | Michael Ficarra | May 2018 | 2019 |
| JSON superset | Richard Gibson | Mark Miller Mathias Bynens | May 2018 | 2019 |
Symbol.prototype.description | Michael Ficarra | Michael Ficarra | November 2018 | 2019 |
Function.prototype.toString revision | Michael Ficarra | Michael Ficarra | November 2018 | 2019 |
Object.fromEntries | Darien Maillet Valentine | Jordan Harband Kevin Gibbons | January 2019 | 2019 |
Well-formed JSON.stringify | Richard Gibson | Mathias Bynens | January 2019 | 2019 |
String.prototype.{trimStart,trimEnd} | Sebastian Markbåge | Sebastian Markbåge Mathias Bynens | January 2019 | 2019 |
Array.prototype.{flat,flatMap} | Brian Terlson Michael Ficarra Mathias Bynens | Brian Terlson Michael Ficarra | January 2019 | 2019 |
String.prototype.matchAll | Jordan Harband | Jordan Harband | March 2019 | 2020 |