Package · npm

eslint-plugin-functional

npm · v10.0.1 · MIT

ESLint rules to promote functional programming in TypeScript.

Developer Tools (primary) · Tentative

Tentative categories were assigned with moderate confidence (0.5 to 0.75): they are shown, but they do not count toward a category’s momentum. How categories work

Technologies

Install

npm install eslint-plugin-functional

Adoption

Downloads (30 days): 1.5M; Observeddownloads / 30 days
Popularity: Lower half on npm; Derived44th percentile within npm
Dependents: Collectinghistory; Collecting
Maintenance: 0.93; DerivedRelease cadence and recency, 0 to 1
Releases per year: 19; 134 versions over its life

Growth by period

Derived by Crest of Tech from two observations of npm’s own figure, a period apart. Nothing is stored or estimated: without an observation near the period’s start, the period is still collecting.

7 days: +4.1% · 7d; Derived+61K downloads / 30 days, SEP 29 → OCT 6
30 days: +9.9% · 30d; Derived+139K downloads / 30 days, SEP 6 → OCT 6
90 days: +45.1% · 90d; Derived+480.9K downloads / 30 days, JUL 6 → OCT 6
1 year: +91.3% · 1y; Derived+738.8K downloads / 30 days, NOV 10 → OCT 6

Adoption historydownloads / 30 days · 110 observations

Table of observations (115)

Day	downloads / 30 days	Dependents
OCT 6, 2026	1,548,152	Not observed
OCT 5, 2026	1,521,080	Not observed
OCT 4, 2026	1,548,152	Not observed
OCT 3, 2026	1,578,331	Not observed
OCT 2, 2026	1,512,129	Not observed
OCT 1, 2026	1,520,669	Not observed
SEP 30, 2026	1,508,457	Not observed
SEP 29, 2026	1,487,175	Not observed
SEP 28, 2026	1,431,939	Not observed
SEP 27, 2026	1,377,117	Not observed
SEP 26, 2026	1,390,980	Not observed
SEP 25, 2026	1,423,696	Not observed
SEP 24, 2026	1,430,744	Not observed
SEP 23, 2026	1,426,110	Not observed
SEP 22, 2026	1,402,751	Not observed
SEP 21, 2026	1,365,048	Not observed
SEP 20, 2026	1,327,928	Not observed
SEP 19, 2026	1,356,346	Not observed
SEP 18, 2026	1,404,472	Not observed
SEP 17, 2026	1,414,638	Not observed
SEP 16, 2026	1,414,504	Not observed
SEP 15, 2026	1,394,027	Not observed
SEP 14, 2026	1,418,227	Not observed
SEP 13, 2026	1,369,557	Not observed
SEP 12, 2026	1,351,966	Not observed
SEP 11, 2026	1,397,259	Not observed
SEP 10, 2026	1,392,665	Not observed
SEP 9, 2026	1,378,834	Not observed
SEP 8, 2026	1,361,467	Not observed
SEP 7, 2026	1,384,433	Not observed
SEP 6, 2026	1,409,116	Not observed
SEP 5, 2026	1,449,015	Not observed
SEP 4, 2026	1,469,602	Not observed
SEP 3, 2026	1,468,781	Not observed
SEP 2, 2026	1,534,795	Not observed
SEP 1, 2026	1,505,298	Not observed
AUG 31, 2026	1,450,334	Not observed
AUG 30, 2026	1,408,922	Not observed
AUG 29, 2026	1,427,960	Not observed
AUG 28, 2026	1,458,384	Not observed
AUG 27, 2026	1,464,259	Not observed
AUG 26, 2026	1,468,974	Not observed
AUG 25, 2026	1,460,585	Not observed
AUG 24, 2026	1,412,506	Not observed
AUG 23, 2026	1,372,096	Not observed
AUG 22, 2026	1,388,627	Not observed
AUG 21, 2026	1,425,379	Not observed
AUG 20, 2026	1,435,065	Not observed
AUG 19, 2026	1,426,396	Not observed
AUG 18, 2026	1,407,856	Not observed
AUG 17, 2026	1,357,491	Not observed
AUG 16, 2026	1,327,196	Not observed
AUG 15, 2026	1,345,190	Not observed
AUG 14, 2026	1,378,854	Not observed
AUG 13, 2026	1,431,414	Not observed
AUG 12, 2026	1,421,367	Not observed
AUG 11, 2026	1,416,887	Not observed
AUG 10, 2026	1,362,552	Not observed
AUG 9, 2026	1,322,767	Not observed
AUG 8, 2026	1,338,071	Not observed
AUG 7, 2026	1,358,011	Not observed
AUG 6, 2026	1,346,298	Not observed
AUG 5, 2026	1,348,879	Not observed
AUG 4, 2026	1,334,301	Not observed
AUG 3, 2026	1,289,212	Not observed
AUG 2, 2026	1,241,140	Not observed
AUG 1, 2026	1,248,496	Not observed
JUL 31, 2026	1,275,645	Not observed
JUL 30, 2026	1,278,071	Not observed
JUL 29, 2026	1,271,114	Not observed
JUL 28, 2026	1,256,628	Not observed
JUL 27, 2026	1,201,842	Not observed
JUL 26, 2026	1,150,373	Not observed
JUL 20, 2026	1,097,961	Not observed
JUL 13, 2026	1,052,718	Not observed
JUL 6, 2026	1,067,272	Not observed
JUN 29, 2026	1,011,517	Not observed
JUN 22, 2026	1,018,112	Not observed
JUN 15, 2026	1,007,895	Not observed
JUN 8, 2026	984,779	Not observed
JUN 1, 2026	1,014,155	Not observed
MAY 25, 2026	991,121	Not observed
MAY 18, 2026	984,913	Not observed
MAY 11, 2026	974,522	Not observed
MAY 4, 2026	968,339	Not observed
APR 27, 2026	996,342	Not observed
APR 20, 2026	1,038,992	Not observed
APR 13, 2026	1,097,595	Not observed
APR 6, 2026	1,134,373	Not observed
MAR 30, 2026	1,197,530	Not observed
MAR 23, 2026	1,248,129	Not observed
MAR 16, 2026	1,256,578	Not observed
MAR 9, 2026	1,282,790	Not observed
MAR 2, 2026	1,362,041	Not observed
FEB 23, 2026	1,378,038	Not observed
FEB 16, 2026	1,344,556	Not observed
FEB 9, 2026	1,278,495	Not observed
FEB 2, 2026	1,137,660	Not observed
JAN 26, 2026	883,643	Not observed
JAN 19, 2026	687,872	Not observed
JAN 12, 2026	642,214	Not observed
JAN 5, 2026	634,190	Not observed
DEC 29, 2025	729,969	Not observed
DEC 22, 2025	841,381	Not observed
DEC 15, 2025	857,086	Not observed
DEC 8, 2025	857,572	Not observed
DEC 1, 2025	834,704	Not observed
NOV 24, 2025	816,860	Not observed
NOV 17, 2025	826,485	Not observed
NOV 10, 2025	809,356	Not observed
NOV 3, 2025	Not observed	Not observed
OCT 27, 2025	Not observed	Not observed
OCT 20, 2025	Not observed	Not observed
OCT 13, 2025	Not observed	Not observed
OCT 6, 2025	Not observed	Not observed

Facts from the registry

Latest version: v10.0.1; 134 versions
First published: JUL 19, 2019
Last release: SEP 16, 2026; 39d ago
Licence: MIT
Links: npm page (opens in a new tab); Homepage · github.com (opens in a new tab); Source · github.com (opens in a new tab)

Repository

In the Crest catalog

eslint-functional/eslint-plugin-functional

ESLint rules to disable mutation and promote fp in JavaScript and TypeScript.

Stars: 1K
Forks: 36
Language: TypeScript
Last push: 23d ago
Last release: 39d ago

Linked by the package’s own registry metadata.GitHub (opens in a new tab)

Dependencies latest version · v10.0.1

Runtime 6

@typescript-eslint/utils^8.26.0
deepmerge-ts^7.1.5
escape-string-regexp^5.0.0
is-immutable-type^5.0.1
ts-api-utils^2.0.1
ts-declaration-location^1.0.6

Peer 2

eslint^9.0.0 || ^10.0.0
typescript>=4.7.4

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