| [Function.pipe and flow][pipe-flow] | J.S. Choi | Withdrawn: [rejected for stage 1][pipe-flow-notes] |

| [`Symbol.thenable`][symbol-thenable] | Gus Caplan<br />Jordan Harband<br />Myles Borins | Withdrawn; changing thenability on Module Namespace objects is not web compatible, and allowing non-Promise use of "then" is not worth slowing down all Promise operations |

| [WeakRefs `cleanupSome`][cleanup-some] | Yulia Startsev<br />Daniel Ehrenberg | Withdrawn; subsumed by WebAssembly JS Promise Integration, which avoids the long task issue |

See also the [active proposals](README.md), [stage 1 proposals](stage-1-proposals.md), [stage 0 proposals](stage-0-proposals.md), and [finished proposals](finished-proposals.md) documents.

[symbol-thenable-notes]: https://github.com/tc39/notes/blob/def2ee0c04bc91612576237314a4f3b1fe2edaef/meetings/2018-05/may-24.md#symbolthenable-for-stage-1-or-2

[cleanup-some]: https://github.com/tc39/proposal-cleanup-some

[cleanup-some-notes]: https://github.com/tc39/notes/blob/HEAD/meetings/2020-07/july-21.md#weakrefs-for-stage-4--cleanupsome-for-stage-23

| [`do` expressions][do] | Dave Herman | Kevin Gibbons | _{[June&nbsp;2020][do-notes]} |

| Change `Number.parseInt`/`parseFloat` to not coerce `null`/`undefined`/`NaN` (repo link TBD) | | Brendan Eich | _{[July&nbsp;2017][parseInt-to-parseFloat]} |

| [Binary AST][binary-ast] | Shu-yu Guo | Shu-yu Guo | _{[May&nbsp;2018][binary-ast-notes]} |

| [First-class protocols][protocols] | Michael Ficarra | Michael Ficarra | _{[July&nbsp;2018][protocols-notes]} |

| [Partial application][partial-application] | Ron Buckton | Ron Buckton | _{[July&nbsp;2018][partial-application-notes]} |

| [Cancellation API][cancel-api] | Ron Buckton | Ron Buckton<br />Brian Terlson | _{[July&nbsp;2018][cancel-api-notes]} |

| [Wavy Dot: Syntactic Support for Promise Pipelining][promise-pipelining] | Mark Miller<br />Chip Morningstar<br />Michael Fig | Mark Miller<br />Chip Morningstar<br />Michael Fig | _{[December&nbsp;2019][promise-pipelining-notes]} |

| [OOM Fails Fast][oom] | Mark Miller | Mark Miller | _{[December&nbsp;2019][oom-notes]} |

| [Array filtering][array-filtering] | Justin Ridgewell | Justin Ridgewell | _{[February&nbsp;2020][array-filtering-notes]} |

| [Async initialization][async-init] | Bradley Farias | Bradley Farias | _{[February&nbsp;2020][async-init-notes]} |

| [Decimal][decimal] | Daniel Ehrenberg<br />Andrew Paprocki | Philip Chimento<br />Andrew Paprocki<br />Jesse Alama | _{[December&nbsp;2021][decimal-notes]} |

| [Preserve Host Virtualizability][virtualize] | Mark Miller<br />J.F. Paradis<br />Caridy Patiño<br />Dan Finley<br />Alan Schmitt | Mark Miller<br />J.F. Paradis<br />Caridy Patiño<br />Dan Finley<br />Alan Schmitt | _{[February&nbsp;2020][virtualize-notes]} |

[parseInt-to-parseFloat]: https://github.com/tc39/notes/blob/HEAD/meetings/2017-07/jul-26.md#13iib-consider-changing-numberparseint-and-numberparsefloat

[binary-ast]: https://github.com/tc39/proposal-binary-ast

[binary-ast-notes]: https://github.com/tc39/notes/blob/HEAD/meetings/2018-05/may-24.md#binary-ast

[protocols]: https://github.com/tc39/proposal-first-class-protocols

[protocols-notes]: https://github.com/tc39/notes/blob/HEAD/meetings/2018-07/july-25.md#updates-on-first-class-protocols

[partial-application]: https://github.com/tc39/proposal-partial-application

[oom-notes]: https://github.com/tc39/notes/blob/HEAD/meetings/2019-12/december-5.md#update-on-oom-must-fail-fast

[array-filtering]: https://github.com/tc39/proposal-array-filtering

[array-filtering-notes]: https://github.com/tc39/notes/blob/HEAD/meetings/2020-02/february-5.md#status-update-on-array-filtering

[decimal]: https://github.com/tc39/proposal-decimal

[decimal-notes]: https://github.com/tc39/notes/blob/HEAD/meetings/2021-12/dec-15.md#decimals

[virtualize]: https://github.com/Agoric/proposal-preserve-virtualizability