Installing an error listener has a side effect that emitted errors are
considered as handled. This is quite bad for monitoring/logging tools
which tend to be interested in errors but don't want to cause side
effects like swallow an exception.
There are some workarounds in the wild like monkey patching emit or
remit the error if monitoring tool detects that it is the only listener
but this is error prone and risky.
This PR allows to install a listener to monitor errors with the side
effect to consume the error. To avoid conflicts with other events it
exports a symbol on EventEmitter which owns this special meaning.
Refs: https://github.com/open-telemetry/opentelemetry-js/issues/225
PR-URL: https://github.com/nodejs/node/pull/30932
Refs: https://github.com/open-telemetry/opentelemetry-js/issues/225
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Instead of telling someone "It is important to do X", just tell them to
"Do X."
PR-URL: https://github.com/nodejs/node/pull/30108
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
In most cases, stability note is the first info in a doc section
after YAML. This PR makes it consistent across all docs,
as this info seems the most relevant for a reader.
PR-URL: https://github.com/nodejs/node/pull/29799
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
These are rendered as single breaks.
Addresses Markdownlint MD012 rule.
PR-URL: https://github.com/nodejs/node/pull/29352
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
This change adds a EventEmitter.once() method that wraps ee.once in a
promise.
Co-authored-by: David Mark Clements <david.mark.clements@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/26078
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
This adds the `capitalized-comments` eslint rule to verify that
actual sentences use capital letters as starting letters. It ignores
special words and all lines below 62 characters.
PR-URL: https://github.com/nodejs/node/pull/24808
Reviewed-By: Sam Ruby <rubys@intertwingly.net>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/21782
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Change instances of `foo has been deprecated` to `foo is deprecated` and
similar.
PR-URL: https://github.com/nodejs/node/pull/21136
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
this === eventEmitter or this === instance of EventEmitter,
but it's this is not EventEmitter.
PR-URL: https://github.com/nodejs/node/pull/20537
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
"periodically" implies regular time intervals between emitted events,
but as first example, "peer connects", implies, the time intervals
may be irregular or unpredictable.
PR-URL: https://github.com/nodejs/node/pull/20581
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/19915
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Change type annotations for eventName in events API doc
from {any} to {string|symbol}.
PR-URL: https://github.com/nodejs/node/pull/17666
Fixes: https://github.com/nodejs/node/issues/17657
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Refactor lib & src code to eliminate all deep reaches into the
internal _events dictionary object, instead use available APIs
and add an extra method to EventEmitter: rawListeners.
PR-URL: https://github.com/nodejs/node/pull/17440
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Our docs use both "one time listener" and "one-time listener". The
second is more correct. Standardize on that.
PR-URL: https://github.com/nodejs/node/pull/17502
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Each page of the API documentation should have links to other versions
of the same page. This will make it easier to switch between the current
"live" release at nodejs.org and LTS versions.
PR-URL: https://github.com/nodejs/node/pull/10958
Fixes: https://github.com/nodejs/node/issues/10726
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Make the style of "Note:" paragraphs consistent and document the
guidelines in `doc/STYLE_GUIDE.md`.
PR-URL: https://github.com/nodejs/node/pull/13133
Fixes: https://github.com/nodejs/node/issues/13131
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/12726
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/11938
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
PR-URL: https://github.com/nodejs/node/pull/11489
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Currently, some of the docs use different indentation for comments
in the code examples. This commit makes the indentation consistent
by putting the comments at the beginning of the line (really no
indentation that is).
PR-URL: https://github.com/nodejs/node/pull/9518
Reviewed-By: Teddy Katz <teddy.katz@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
PR-URL: https://github.com/nodejs/node/pull/8485
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This makes the famous `EventEmitter memory leak` warnings occurring
when the listener count for a given event exceeds a specified number
more programatically accessible, by giving them properties referring
to the event emitter instance and the event itself.
This can be useful for debugging the origins of such a warning when
the stack itself doesn’t reveal enough information about the event
emitter instance itself, e.g. when manual inspection of the
already-registered listeners is expected to be useful.
PR-URL: https://github.com/nodejs/node/pull/8298
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <Fishrock123@rocketmail.com>
