reselect

Selector library for Redux

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11Distinct people

15Mentions

0Explicit recommenders

19KGitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

Selector library for Redux

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

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Also in these discussions

reduxjs/redux-toolkit · linked in 4 of the same discussions
reduxjs/react-redux · linked in 3 of the same discussions

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

This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 6:36:16 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 year15 dated mentions

Observed mentions: 2015-07-05 10:14:46 UTC to 2023-12-04 14:33:19 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

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2015	2015-01-01 00:00:00 UTC	2016-01-01 00:00:00 UTC	3	0	3
2016	2016-01-01 00:00:00 UTC	2017-01-01 00:00:00 UTC	2	0	2
2017	2017-01-01 00:00:00 UTC	2018-01-01 00:00:00 UTC	2	1	1
2018	2018-01-01 00:00:00 UTC	2019-01-01 00:00:00 UTC	2	0	2
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	0	0	0
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	1	0	1
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	1	0	1
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	2	0	2
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	2	0	2

What Hacker News says

2 sources

acemarke·Dec 4, 2023

I am _thrilled_ to announce that: Redux Toolkit 2.0 is LIVE!!! - https://github.com/reduxjs/redux-toolkit/releases/tag/v2.0.0 This major version has new features, faster perf, smaller bundle size, and removes deprecated options. It's accompanied by majors for all our Redux family packages ## RTK 2.0: - a new `combineSlices` method for lazy-loading reducers - Updates to `createSlice` to include a `selectors` field and allow defining thunks inside - Immer 10 w/ faster updates - Removal of deprecated options See the migration guide: - https://redux.js.org/usage/migrations/migrating-rtk-2 All of the Redux libraries now have modernized packaging with full ESM/CJS compat. They also ship modern JS (no transpiling for IE11), which means smaller bundle sizes. We've also done byte-shaving work to shrink the bundles (extracting error messages, de-du

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ping imports) ## Redux core 5.0: - The TS conversion we did in 2019! - Action types _must_ be strings - `UnknownAction` as the default action type - Better preloaded state types - Internal subscription improvements - Still marks `createStore` as deprecated! - https://github.com/reduxjs/redux/releases/tag/v5.0.0 ## React-Redux 9.0: - *Now requires React 18 and RTK 2.0 / Redux 5.0* - Updates dev-mode checks - Throws better errors in an RSC environment - https://github.com/reduxjs/react-redux/releases/tag/v9.0.0 ## Reselect 5.0: - Switches to a new `weakMapMemoize` memoizer as default - Renames `defaultMemoize` to `lruMemoize` - Allows passing memoizer options direct to `createSelector` - Many TS improvements - https://github.com/reduxjs/reselect/releases/tag/v5.0.1 ## Redux Thunk 3.0: - Drops the default export and switches to named exports ( `{thunk, withExtraArgument}` ) - https://github.com/reduxjs/redux-thunk/releases/tag/v3.1.0 This has been a _huge_ year-long development effort! We're thrilled to get these improvements out. The tooling and bundle improvements will help all users, and we think the features and TS changes will improve the Redux dev experience significantly. Thank you SO MUCH to everyone who has contributed or helped test out the work! Please file bug reports for the inevitable issues that pop up post-release! but now I'm going off on a conf trip and going to take a very well-earned break from Redux work for December :)

In Redux Toolkit 2.0: new features, faster perf, smaller bundle sizes, and more

acemarke·Jan 15, 2023

Hi, I'm a Redux maintainer. This is a good post, but I'm a bit surprised it doesn't talk about memoized selector functions at all. We specifically teach those as a way to improve performance, by avoiding costly transformations and consistently returning the same result reference until the inputs change: - https://redux.js.org/tutorials/essentials/part-6-performance... - https://redux.js.org/tutorials/fundamentals/part-7-standard-... - https://redux.js.org/usage/deriving-data-selectors Use of `React.memo()` also helps in cases like the large list, especially if you're only passing down the item ID as props to the list item components and letting them select their own data based on that ID. Also, as of Reselect 4.1, there are some additional options built into `createSelector` for doing comparisons, such as an option that can do a shallow

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equality check on the _new_ result, and stick with the _old_ result if they're the same: - https://github.com/reduxjs/reselect#defaultmemoizefunc-equal...

In Redux Performance Tips