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thefrontside
effection
TypeScript2022–2024
thefrontside / effection

effection

Structured concurrency and effects for JavaScript

Web DevelopmentSystems & Infrastructure
Explore on GitHubRead Hacker News discussions
2Distinct people
6Mentions
0Explicit recommenders
866GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Structured concurrency and effects for JavaScript

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 12:54:37 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month6 dated mentions

Observed mentions: 2022-07-02 13:24:19 UTC to 2024-02-14 16:02:27 UTC.

0122022-07-01 00:00:00 UTC to 2022-08-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 commentsJul 20222022-08-01 00:00:00 UTC to 2022-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-09-01 00:00:00 UTC to 2022-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-10-01 00:00:00 UTC to 2022-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-11-01 00:00:00 UTC to 2022-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-12-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-01-01 00:00:00 UTC to 2023-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-02-01 00:00:00 UTC to 2023-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-03-01 00:00:00 UTC to 2023-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-04-01 00:00:00 UTC to 2023-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 commentsApr 20232023-05-01 00:00:00 UTC to 2023-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-06-01 00:00:00 UTC to 2023-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-07-01 00:00:00 UTC to 2023-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-08-01 00:00:00 UTC to 2023-09-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-09-01 00:00:00 UTC to 2023-10-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2023-10-01 00:00:00 UTC to 2023-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-11-01 00:00:00 UTC to 2023-12-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-12-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024-01-01 00:00:00 UTC to 2024-02-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024-02-01 00:00:00 UTC to 2024-03-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsFeb 2024

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Jul 20222022-07-01 00:00:00 UTC2022-08-01 00:00:00 UTC110
Aug 20222022-08-01 00:00:00 UTC2022-09-01 00:00:00 UTC000
Sep 20222022-09-01 00:00:00 UTC2022-10-01 00:00:00 UTC000
Oct 20222022-10-01 00:00:00 UTC2022-11-01 00:00:00 UTC000
Nov 20222022-11-01 00:00:00 UTC2022-12-01 00:00:00 UTC000
Dec 20222022-12-01 00:00:00 UTC2023-01-01 00:00:00 UTC000
Jan 20232023-01-01 00:00:00 UTC2023-02-01 00:00:00 UTC000
Feb 20232023-02-01 00:00:00 UTC2023-03-01 00:00:00 UTC000
Mar 20232023-03-01 00:00:00 UTC2023-04-01 00:00:00 UTC000
Apr 20232023-04-01 00:00:00 UTC2023-05-01 00:00:00 UTC000
May 20232023-05-01 00:00:00 UTC2023-06-01 00:00:00 UTC000
Jun 20232023-06-01 00:00:00 UTC2023-07-01 00:00:00 UTC000
Jul 20232023-07-01 00:00:00 UTC2023-08-01 00:00:00 UTC000
Aug 20232023-08-01 00:00:00 UTC2023-09-01 00:00:00 UTC000
Sep 20232023-09-01 00:00:00 UTC2023-10-01 00:00:00 UTC202
Oct 20232023-10-01 00:00:00 UTC2023-11-01 00:00:00 UTC000
Nov 20232023-11-01 00:00:00 UTC2023-12-01 00:00:00 UTC000
Dec 20232023-12-01 00:00:00 UTC2024-01-01 00:00:00 UTC101
Jan 20242024-01-01 00:00:00 UTC2024-02-01 00:00:00 UTC101
Feb 20242024-02-01 00:00:00 UTC2024-03-01 00:00:00 UTC101

What Hacker News says

6 sources
qudat·Feb 14, 2024
If anyone is interested, we are leveraging delimited continuations as the foundational paradigm for structured concurrency and async flow control in the browser. I gave a talk about it recently at Michigan Typescript: https://www.youtube.com/watch?si=Mok0J8Wp0Z-ahFrN&v=uRbqLGj_... https://github.com/thefrontside/effection https://github.com/neurosnap/starfx With delimited continuations, we are able to express any async flow control, it is an incredibly powerful paradigm.
In Maybe Everything Is a Coroutine
qudat·Jan 1, 2024
While working on effection@v3 (https://github.com/thefrontside/effection) we spent a bunch of time ensuring that our delimited continuations could handle deep recursive call stacks in Deno. PR: https://github.com/thefrontside/continuation/pull/11 TCO would have definitely simplified this issue. What’s worse is hitting maximum memory callstack exception is very tricky to catch and is not reliable across runtimes. So when a user hits it it can be tricky to track down.
In Bun, JavaScript, and TCO
qudat·Dec 18, 2023
`redux-saga` maintainer here. I've been using `effection` to build a replacement for `redux-saga` over at https://github.com/neurosnap/starfx Effection has demonstrated to me how truly powerful delimited continuations are and why structured concurrency is an incredible asset for anything that requires async flow control -- basically everything in TS/JS. I know sometimes it's hard to imagine why someone would need structured concurrency or care about delimited continuations for a front-end application, but this is a game changer in terms of expressing async flow control. Some things to note about Effection: - API surface area is small https://github.com/thefrontside/effection/issues/851 - It tries to stay as close to JS constructs as possible so it will feel very familiar - Resource cleanup is automatic (when a function passes out of scope
Read the rest
all descendent tasks are shut down automatically) - End-user doesn't need to think about delimited continuations The only leap users need to learn coming from async/await is the syntax. import { main, call } from "effection"; await main(function*() { const response = yield* call(fetch("my-api.com")); const data = yield* call(response.json); }); In this way, effection is very approachable and I highly recommend people try it out.
In Effection 3.0 – Structured Concurrency and Effects for JavaScript
qudat·Sep 2, 2023
redux-saga maintainer here! Before async/await, generators were the only way to express async flow control in a synchronous way. Libraries like “co” were really popular at the time. There are some really downside to async/await which is why redux-saga continued to use generators. Even in 2023, me and a couple others are experimenting with deliminited continuations using generators as the foundation. A couple of libraries we have built: - https://github.com/thefrontside/continuation - https://github.com/thefrontside/effection/tree/v3 - https://github.com/neurosnap/starfx The last one intends to replace redux-saga using DCs. Here’s a presentation I gave recently talking about DCs in typescript: https://youtu.be/uRbqLGj_6mI?si=XI0JNMKMoO2VHMvM
In Internals of async / await in JavaScript

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