tc39/proposal-type-annotations on Hacker News

…projects), but I don't think it went anywhere... or if it is it's getting there at a snail's pace: https://github.com/tc39/proposal-type-annotations

comment by IshKebab · 2026-05-22 · in Deno 2.8

Because standardization is a political process that takes time and consensus to achieve? https://github.com/tc39/proposal-type-annotations

comment by WorldMaker · 2026-05-22 · in Deno 2.8

…want the whole type zoo. For your Javascript f/end context, I like the proposed TC39 approach ( https://github.com/tc39/proposal-type-annotations?tab=readme... ). The typing is optional, does not break existing syntax and can still be used…

comment by lelanthran · 2026-01-24 · in Some C habits I employ for the modern day

Sorry, I should have been clearer about which proposal I was talking about: https://github.com/tc39/proposal-type-annotations

comment by lelanthran · 2025-12-23 · in Test, don't just verify

Not really, at best it's a verbose and limited subset. https://github.com/tc39/proposal-type-annotations?tab=readme...

comment by epolanski · 2025-12-14 · in JSDoc is TypeScript

The sooner we get https://github.com/tc39/proposal-type-annotations , the better. Once we get it, there is still a solid decade before runtimes support it, and optimistically, still more 10 years minimum having to deal with an interpreted…

comment by gaigalas · 2025-12-14 · in JSDoc is TypeScript

…is a serious proposal that gained some traction for quite a while but seems to have fallen off https://github.com/tc39/proposal-type-annotations

comment by culi · 2025-12-04 · in It’s time to free JavaScript (2024)

It's not a stupid question, but here is the TC39 proposal to add type declarations to JS: https://github.com/tc39/proposal-type-annotations

comment by benbayard · 2025-12-02 · in Progress on TypeScript 7 – December 2025

…still won't do anything with that extra info though, it'll get stripped just like comments. https://github.com/tc39/proposal-type-annotations

comment by notnullorvoid · 2025-09-18 · in WASM 3.0 Completed

It's been stuck at stage 1 since early 2022 unfortunately. https://github.com/tc39/proposal-type-annotations

comment by TheBicPen · 2025-09-18 · in WASM 3.0 Completed

…is actually dipping their toes in the water of adding typing to the spec, and it's at Stage 1: https://github.com/tc39/proposal-type-annotations . Now of course, this would only add type syntax to the language, not true processing: there's…

comment by hungryhobbit · 2025-08-17 · in Node.js is able to execute TypeScript files without additional configuration

Someday! https://github.com/tc39/proposal-type-annotations

comment by avinashbot · 2025-08-17 · in Node.js is able to execute TypeScript files without additional configuration

Direct link to the Stage 1 proposal: https://github.com/tc39/proposal-type-annotations

comment by WorldMaker · 2025-08-05 · in Rust, Python, and TypeScript: the new trifecta

For now. https://github.com/tc39/proposal-type-annotations

comment by 90s_dev · 2025-07-14 · in A job queue in two lines of JavaScript

…[3]: https://www.typescriptlang.org/docs/handbook/jsdoc-supported... [4]: https://github.com/tc39/proposal-type-annotations

comment by quectophoton · 2025-02-12 · in Show HN: A no-build fullstack SSR TypeScript web framework

…decisions for my current code based on something that probably will never happen in the future. https://github.com/tc39/proposal-type-annotations/commits/ma...

comment by n144q · 2025-01-20 · in TypeScript enums: use cases and alternatives

…be achieved without enums. See https://www.typescriptlang.org/play/?#code/PTAEFEA8EMFsAcA2B... [1] https://github.com/tc39/proposal-type-annotations

comment by msoad · 2025-01-20 · in TypeScript enums: use cases and alternatives

…ever got accepted, but alas TC39 moves slowly... [1] https://servicestack.net/posts/javascript [2] https://github.com/tc39/proposal-type-annotations

comment by mythz · 2024-12-10 · in Just Say No to JavaScript

…is NPM and node_modules. Vite and the wider ecosystem that it pulls together is pretty amazing. [0] https://github.com/tc39/proposal-type-annotations

comment by CharlieDigital · 2024-11-18 · in Impressions of React and TypeScript from an Elixir/Elm Developer

There is a proposal for that: https://github.com/tc39/proposal-type-annotations

comment by matharmin · 2024-09-26 · in ts-blank-space is a fast type-stripping compiler

Yes. That is noted in the PR: > There is a TC39 proposal for type annotations Which links to https://github.com/tc39/proposal-type-annotations It is a long ways off though.

comment by herpdyderp · 2024-07-25 · in Node.js adds experimental support for TypeScript

…for the purposes of type stripping (not type checking), is attempting to be somewhat standardized: https://github.com/tc39/proposal-type-annotations

comment by WorldMaker · 2024-07-25 · in Node.js adds experimental support for TypeScript

Imho standardizing the syntax is enough and this is what https://github.com/tc39/proposal-type-annotations does. The type checker is immensely complex and should be left out so that other type checkers can be developed, e.g. similar to how…

comment by silverwind · 2024-07-25 · in Node.js adds experimental support for TypeScript

https://github.com/tc39/proposal-type-annotations?tab=readme... You’re welcome.

comment by wiseowise · 2024-07-25 · in Node.js adds experimental support for TypeScript

Stage 1 https://github.com/tc39/proposal-type-annotations So maybe we'll have support in another five years ... Or maybe we'll have "Support in another five years" in five years, who knows

comment by dimava · 2024-07-25 · in Node.js adds experimental support for TypeScript

There is an EcmaScript proposal to go in that direction: https://github.com/tc39/proposal-type-annotations I think this should be part of the language spec.

comment by phartenfeller · 2024-07-25 · in Node.js adds experimental support for TypeScript

This has been proposed for several years now, but there's been very little progress on it: https://github.com/tc39/proposal-type-annotations

comment by mythz · 2024-07-25 · in Node.js adds experimental support for TypeScript

IMO the game changer in your scenario is when type annotations are added as a standard JS feature: https://github.com/tc39/proposal-type-annotations At that point (and with ES modules) you'd be able to run your TS code directly without any…

comment by afavour · 2024-06-20 · in NPM and NodeJS should do more to make ES Modules easy to use

That proposal is not fully compatible with Typescript: https://github.com/tc39/proposal-type-annotations?tab=readme...

comment by MrResearcher · 2024-04-02 · in Bun 1.1

Totally agree. There is a TC39 proposal for that: https://github.com/tc39/proposal-type-annotations

comment by whstl · 2024-04-02 · in Bun 1.1

…than Typescript even! Nothing will be locked at the current level. It's a frikkin magical proposal. https://github.com/tc39/proposal-type-annotations

comment by Sammi · 2024-03-25 · in Monolith – CLI tool for saving complete web pages as a single HTML file

The proposal: https://github.com/tc39/proposal-type-annotations

comment by teaearlgraycold · 2024-03-25 · in Monolith – CLI tool for saving complete web pages as a single HTML file

…the FAQ at the bottom of that Type Annotations proposal is well written and quite detailed. [0] https://github.com/tc39/proposal-type-annotations

comment by WorldMaker · 2024-03-01 · in JSR: The JavaScript Registry

There is only one major JS feature that is missing from modern browsers IMO: type annotations (like https://github.com/tc39/proposal-type-annotations/ or similar) since most people don't want to use JSDoc-based ones. Some people will want…

comment by SahAssar · 2024-02-13 · in CSS WG resolved to officially work on native custom functions and mixins

They held a meeting a few months ago so it's alive but probably still years away. https://github.com/tc39/proposal-type-annotations/issues/184

comment by frankjr · 2024-02-07 · in Go 1.22

…like Type Annotations that provide no type soundness or runtime checks of any kind[0] [0] https://github.com/tc39/proposal-type-annotations

comment by Vt71fcAqt7 · 2023-12-19 · in TC39: Add Object.groupBy and Map.groupBy

…which would allow ("a reasonably large subset") of TypeScript to run directly in the browser. Yay! https://github.com/tc39/proposal-type-annotations

comment by andai · 2023-11-13 · in HTML First

…and have significant performance penalties, but would give more guarantees of type safety. [1] https://github.com/tc39/proposal-type-annotations

comment by claytongulick · 2023-11-08 · in Gleam: a type safe language on the Erlang VM

…1. I'm hoping it doesn't make it in its current form. Some good discussion in the issues, though: https://github.com/tc39/proposal-type-annotations/issues

comment by benatkin · 2023-08-25 · in Why Htmx Does Not Have a Build Step

JSDoc can get you pretty far, but it can be clumsy sometimes. There’s a [TC39 proposal]( https://github.com/tc39/proposal-type-annotations ) to allow types to live in JS code and be treated as comments (similar with Python types today)

comment by a-ungurianu · 2023-08-11 · in TypeScript Without Transpilation (2021)

…over until we get native types. ECMAScript proposals take a long time, but it will eventually come. https://github.com/tc39/proposal-type-annotations

comment by neotrope · 2023-07-18 · in Inconvenient Truths about TypeScript

…build tool to use TypeScript. Fingers crossed the “Type annotations as comments” proposal happens: https://github.com/tc39/proposal-type-annotations

comment by afavour · 2023-06-14 · in ES Modules Are Terrible

…javascript (well, unless Javascript officially supports types which isn't happening anytime soon ( https://github.com/tc39/proposal-type-annotations )). deno does not have any inherent advantages over node if they continue to support node…

comment by endisneigh · 2023-05-26 · in Node.js built-ins on Deno Deploy

And this kind of type syntax is under consideration in TC39 https://github.com/tc39/proposal-type-annotations

comment by makapuf · 2023-05-13 · in TypeScript is 'not worth it' Svelte switches to JavaScript and JSDoc

…modules, we don't need to bundle anymore as the browser will load the relevant files as needed [1] https://github.com/tc39/proposal-type-annotations [2] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guid...

comment by mcluck · 2023-05-13 · in TypeScript team released an explorer for performance tuning

…I will probably use those. At least in Node, where I have more control of the runtime version. [1] https://github.com/tc39/proposal-type-annotations

comment by pier25 · 2023-05-11 · in The JavaScript ecosystem is delightfully weird

…step before running. For such codebases, TypeScript's build hurdle has already been overcome. [0] https://github.com/tc39/proposal-type-annotations

comment by 18al · 2023-05-11 · in TS to JSDoc Conversion

…and let interesting dialects emerge from the consensus ? I like jsdoc but the syntax is urgh. [1] https://github.com/tc39/proposal-type-annotations

comment by makapuf · 2023-05-10 · in TS to JSDoc Conversion

…bundling step for production. https://devblogs.microsoft.com/typescript/a-proposal-for-typ... https://github.com/tc39/proposal-type-annotations

comment by laurencerowe · 2023-05-03 · in JavaScript import maps are now supported cross-browser

…with a JS interpreter If this proposal will ever be accepted, TS will be (in large parts) valid JS: https://github.com/tc39/proposal-type-annotations

comment by nikeee · 2023-03-20 · in TypeScript cannot emit valid ES modules due to file extension issue (2020)