NEnevir·Apr 22, 2018
In Show HN: Zones for Node.js using async_hooksothiym23
node-continuation-local-storage
JavaScript2014–2018
othiym23 / node-continuation-local-storage
node-continuation-local-storage
implementation of https://github.com/joyent/node/issues/5243
2Distinct people
2Mentions
0Explicit recommenders
1.1KGitHub stars
What to know before exploring
What it is
implementation of https://github.com/joyent/node/issues/5243
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
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Also in these discussions
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.
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Mentions over time
HN mentions by year2 dated mentions
Observed mentions: 2014-04-16 18:20:35 UTC to 2018-04-22 14:41:18 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
2 sources> They are nestable
trycatch is nestable as well.
> they can store arbitrary values, timers
Nice. I am currently decoupling trycatch's hooking layer to allow for this arbitrarily[1]. The continuation-local-storage library[2] allows for this functionality as well.
> intercept microtasks
Care to elaborate?
> wrap closures to be associated with the Zone
Yup, similar to domains, though I do wonder when this is necessary? One use case that came up with trycatch was finally support, or the need to exit the current domain/trycatch context.[3]
Lastly, there's one consistent failure I see in all these domain-like, async listener-like, long-stack-trace, event-source modules and that's long-lived resources or how they incorrectly handle EventEmitter handler's context[4], with the core issue being the boundary at which the hook is applied (From Trevo
Read the rest
r Norris' comment):
After thinking this over, it occurred to me that trycatch is a top down approach. Whereas AsyncListener is bottom up.
Long story short, things like keep-alive sockets will retain a domain/context/zone(?) and their handlers will be called with the incorrect context.
Do you fix this in your zone.js implementation?
[1] https://github.com/CrabDude/trycatch/issues/38
[2] https://github.com/othiym23/node-continuation-local-storage
[3] https://github.com/CrabDude/trycatch/issues/37
[4] https://github.com/CrabDude/trycatch/issues/32