Stage N/A Draft / March 20, 2026

Possible Ways to Extend Temporal in Future TC39 Proposals

Introduction

While working on the Temporal proposal, the proposal champions gathered user feedback via surveys from many JavaScript developers who had tried out the proposed API, as well as via interviews, and informally from people who had commented or added reactions to GitHub issues.

There were many suggestions and features that were not included in the proposal for one or more reasons:

Seemed useful, but not essential to the success of an already large proposal.
Could be implemented in userland in the meantime.
Could be implemented in the future in a web-compatible way.
Would be useful to see how (and whether) the community fills the feature gap before designing a built-in equivalent.

Temporal is now implemented in several browsers and has reached Stage 4 (meaning it's officially part of the language specification), so this repo is a way that TC39 and the community overall can centralize feedback about possible extensions to Temporal in the future. Feel free to add a 👍 to your favorite ideas for extending Temporal, as shown in the GitHub issues of the proposal-temporal-v2 repo.

A Copyright & Software License

Copyright Notice

Software License

All Software contained in this document ("Software") is protected by copyright and is being made available under the "BSD License", included below. This Software may be subject to third party rights (rights from parties other than Ecma International), including patent rights, and no licenses under such third party rights are granted under this license even if the third party concerned is a member of Ecma International. SEE THE ECMA CODE OF CONDUCT IN PATENT MATTERS AVAILABLE AT https://ecma-international.org/memento/codeofconduct.htm FOR INFORMATION REGARDING THE LICENSING OF PATENT CLAIMS THAT ARE REQUIRED TO IMPLEMENT ECMA INTERNATIONAL STANDARDS.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
Neither the name of the authors nor Ecma International may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE ECMA INTERNATIONAL "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ECMA INTERNATIONAL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.