Immer
Shares rank 16 of 24 JavaScript libraries by recommenders
Developers recommend Immer for working with immutable state in JavaScript, citing efficient modifications and a well-designed API. No criticisms were recorded.
Developers recommend Immer for working with immutable state in JavaScript, citing efficient modifications and a well-designed API. No criticisms were recorded.
8 people gave an opinion
- recommend it
- 8
- criticize it
- 0
- approval share
- 100%
Recommended in 3 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 8 people recommend itNeeds 10 or more, not met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 3 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Makes immutable state updates easier
“ImmerJS can help a lot here, since immutability is its whole jam.”
Comment from 1 Nov 2025 on Hacker News “that's how I ended up using a lot of libraries like Immer”
Comment from 31 Jan 2026 in “Ask HN: Do you also "hoard" notes/links but struggle to turn them into actions?” Efficient modifications and good performance
“I use an immutable data structures library[2] so that modifications are reasonably efficient”
Comment from 26 Jan 2026 in “Show HN: A small programming language where everything is a value” “Besides performance, the API is very well thought.”
Comment from 28 Dec 2025 in “immer – a library of persistent and immutable data structures written in C++” Well-designed API
“Besides performance, the API is very well thought.”
Comment from 28 Dec 2025 in “immer – a library of persistent and immutable data structures written in C++”
Other JavaScript libraries people recommend
The four most recommended other JavaScript libraries, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| jQuery | 111 | 48 | 70% | 12 | 16 yrs8 owners | Approved |
| Picknplace.js | 58 | 26 | 69% | 1 | — | — |
| Alpine.js | 50 | 16 | 76% | 11 | 1 yr4 owners | Approved |
| Effect (TypeScript library) | 38 | 16 | 70% | 10 | 2 yrs3 owners | Approved |
| ImmerThis page | 8 | 0 | 100% | 3 | — | — |
What people said
4 of the 8 comments that mention it, newest first. Each links to the original comment.
“that's how I ended up using a lot of libraries like Immer”
“I use an immutable data structures library[2] so that modifications are reasonably efficient”
“Besides performance, the API is very well thought.”
“ImmerJS can help a lot here, since immutability is its whole jam.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.