Package Health Score

100 / 100

security
No known security issues
popularity
Key ecosystem project
maintenance
Healthy
community
Active

Explore Similar Packages

Security

No known security issues

All security vulnerabilities belong to production dependencies of direct and indirect packages.

Security and license risk for significant versions

Version				Vulnerabilities	License Risk
56.0.1	\|	11/2024	Popular	0 C 0 H 0 M 0 L	0 H 0 M 0 L
55.0.0	\|	07/2024		0 C 0 H 0 M 0 L	0 H 0 M 0 L
54.0.0	\|	06/2024		0 C 0 H 0 M 0 L	0 H 0 M 0 L
53.0.0	\|	05/2024		0 C 0 H 0 M 0 L	0 H 0 M 0 L
52.0.0	\|	04/2024		0 C 0 H 0 M 0 L	0 H 0 M 0 L

License

MIT

Security Policy

Yes

Is your project affected by vulnerabilities?

Scan your projects for vulnerabilities. Fix quickly with automated fixes. Get started with Snyk for free.

Get started free

Popularity

Key ecosystem project

Weekly Downloads (2,492,593)

GitHub Stars: 4.33K
Forks: 367
Contributors: 150

Direct Usage Popularity

The npm package eslint-plugin-unicorn receives a total of 2,492,593 downloads a week. As such, we scored eslint-plugin-unicorn popularity level to be Key ecosystem project.

Based on project statistics from the GitHub repository for the npm package eslint-plugin-unicorn, we found that it has been starred 4,327 times.

Downloads are calculated as moving averages for a period of the last 12 months, excluding weekends and known missing data points.

Community

Active

Readme.md: Yes
Contributing.md: Yes
Code of Conduct: Yes
Contributors: 150
Funding: Yes

A good and healthy external contribution signal for eslint-plugin-unicorn project, which invites more than one hundred open source maintainers to collaborate on the repository.

Embed Package Health Score Badge

Maintenance

Healthy

Commit Frequency

Open Issues: 380
Open PR: 5
Last Release: 1 month ago
Last Commit: 9 days ago

Further analysis of the maintenance status of eslint-plugin-unicorn based on released npm versions cadence, the repository activity, and other data points determined that its maintenance is Healthy.

We found that eslint-plugin-unicorn demonstrates a positive version release cadence with at least one new version released in the past 3 months.

As a healthy sign for on-going project maintenance, we found that the GitHub repository had at least 1 pull request or issue interacted with by the community.

Keep your project healthy

Check your package.json

Ensure all the packages you're using are healthy and well-maintained

Snyk Vulnerability Scanner

Get health score & security insights directly in your IDE

Package

Node.js Compatibility: >=18.18

Age: 8 years
Dependencies: 16 Direct
Versions: 108
Install Size: 711 kB
Dist-tags: 1
# of Files: 230
Maintainers: 2
TS Typings: No

eslint-plugin-unicorn has more than a single and default latest tag published for the npm package. This means, there may be other tags available for this package, such as next to indicate future releases, or stable to indicate stable releases.

Readme

eslint-plugin-unicorn

> More than 100 powerful ESLint rules

You might want to check out XO, which includes this plugin.

Propose or contribute a new rule ➡

Install

npm install --save-dev eslint eslint-plugin-unicorn

Usage (`eslint.config.js`)

Requires ESLint >=8.56.0.

Use a preset config or configure each rule in eslint.config.js.

If you don't use the preset, ensure you use the same languageOptions config as below.

ES Module (Recommended)

import eslintPluginUnicorn from 'eslint-plugin-unicorn';
import globals from 'globals';

export default [
	{
		languageOptions: {
			globals: globals.builtin,
		},
		plugins: {
			unicorn: eslintPluginUnicorn,
		},
		rules: {
			'unicorn/better-regex': 'error',
			'unicorn/…': 'error',
		},
	},
	// …
];

CommonJS

'use strict';
const eslintPluginUnicorn = require('eslint-plugin-unicorn');
const globals = require('globals');

module.exports = [
	{
		languageOptions: {
			globals: globals.builtin,
		},
		plugins: {
			unicorn: eslintPluginUnicorn,
		},
		rules: {
			'unicorn/better-regex': 'error',
			'unicorn/…': 'error',
		},
	},
	// …
];

Usage (legacy: `.eslintrc.*` or `package.json`)

Use a preset config or configure each rule in package.json.

If you don't use the preset, ensure you use the same env and parserOptions config as below.

{
	"name": "my-awesome-project",
	"eslintConfig": {
		"env": {
			"es2024": true
		},
		"parserOptions": {
			"ecmaVersion": "latest",
			"sourceType": "module"
		},
		"plugins": [
			"unicorn"
		],
		"rules": {
			"unicorn/better-regex": "error",
			"unicorn/…": "error"
		}
	}
}

Rules

💼 Configurations enabled in.
✅ Set in the recommended configuration.
🔧 Automatically fixable by the --fix CLI option.
💡 Manually fixable by editor suggestions.

Name	Description	💼	🔧	💡
better-regex	Improve regexes by making them shorter, consistent, and safer.		🔧
catch-error-name	Enforce a specific parameter name in catch clauses.	✅	🔧
consistent-destructuring	Use destructured variables over properties.		🔧	💡
consistent-empty-array-spread	Prefer consistent types when spreading a ternary in an array literal.	✅	🔧
consistent-existence-index-check	Enforce consistent style for element existence checks with `indexOf()`, `lastIndexOf()`, `findIndex()`, and `findLastIndex()`.	✅	🔧
consistent-function-scoping	Move function definitions to the highest possible scope.	✅
custom-error-definition	Enforce correct `Error` subclassing.		🔧
empty-brace-spaces	Enforce no spaces between braces.	✅	🔧
error-message	Enforce passing a `message` value when creating a built-in error.	✅
escape-case	Require escape sequences to use uppercase values.	✅	🔧
expiring-todo-comments	Add expiration conditions to TODO comments.	✅
explicit-length-check	Enforce explicitly comparing the `length` or `size` property of a value.	✅	🔧	💡
filename-case	Enforce a case style for filenames.	✅
import-style	Enforce specific import styles per module.	✅
new-for-builtins	Enforce the use of `new` for all builtins, except `String`, `Number`, `Boolean`, `Symbol` and `BigInt`.	✅	🔧
no-abusive-eslint-disable	Enforce specifying rules to disable in `eslint-disable` comments.	✅
no-anonymous-default-export	Disallow anonymous functions and classes as the default export.	✅		💡
no-array-callback-reference	Prevent passing a function reference directly to iterator methods.	✅		💡
no-array-for-each	Prefer `for…of` over the `forEach` method.	✅	🔧	💡
no-array-method-this-argument	Disallow using the `this` argument in array methods.	✅	🔧	💡
no-array-push-push	Enforce combining multiple `Array#push()` into one call.	✅	🔧	💡
no-array-reduce	Disallow `Array#reduce()` and `Array#reduceRight()`.	✅
no-await-expression-member	Disallow member access from await expression.	✅	🔧
no-await-in-promise-methods	Disallow using `await` in `Promise` method parameters.	✅		💡
no-console-spaces	Do not use leading/trailing space between `console.log` parameters.	✅	🔧
no-document-cookie	Do not use `document.cookie` directly.	✅
no-empty-file	Disallow empty files.	✅
no-for-loop	Do not use a `for` loop that can be replaced with a `for-of` loop.	✅	🔧	💡
no-hex-escape	Enforce the use of Unicode escapes instead of hexadecimal escapes.	✅	🔧
no-instanceof-array	Require `Array.isArray()` instead of `instanceof Array`.	✅	🔧
no-invalid-fetch-options	Disallow invalid options in `fetch()` and `new Request()`.	✅
no-invalid-remove-event-listener	Prevent calling `EventTarget#removeEventListener()` with the result of an expression.	✅
no-keyword-prefix	Disallow identifiers starting with `new` or `class`.
no-length-as-slice-end	Disallow using `.length` as the `end` argument of `{Array,String,TypedArray}#slice()`.	✅	🔧
no-lonely-if	Disallow `if` statements as the only statement in `if` blocks without `else`.	✅	🔧
no-magic-array-flat-depth	Disallow a magic number as the `depth` argument in `Array#flat(…).`	✅
no-negated-condition	Disallow negated conditions.	✅	🔧
no-negation-in-equality-check	Disallow negated expression in equality check.	✅		💡
no-nested-ternary	Disallow nested ternary expressions.	✅	🔧
no-new-array	Disallow `new Array()`.	✅	🔧	💡
no-new-buffer	Enforce the use of `Buffer.from()` and `Buffer.alloc()` instead of the deprecated `new Buffer()`.	✅	🔧	💡
no-null	Disallow the use of the `null` literal.	✅	🔧	💡
no-object-as-default-parameter	Disallow the use of objects as default parameters.	✅
no-process-exit	Disallow `process.exit()`.	✅
no-single-promise-in-promise-methods	Disallow passing single-element arrays to `Promise` methods.	✅	🔧	💡
no-static-only-class	Disallow classes that only have static members.	✅	🔧
no-thenable	Disallow `then` property.	✅
no-this-assignment	Disallow assigning `this` to a variable.	✅
no-typeof-undefined	Disallow comparing `undefined` using `typeof`.	✅	🔧	💡
no-unnecessary-await	Disallow awaiting non-promise values.	✅	🔧
no-unnecessary-polyfills	Enforce the use of built-in methods instead of unnecessary polyfills.	✅
no-unreadable-array-destructuring	Disallow unreadable array destructuring.	✅	🔧
no-unreadable-iife	Disallow unreadable IIFEs.	✅
no-unused-properties	Disallow unused object properties.
no-useless-fallback-in-spread	Disallow useless fallback when spreading in object literals.	✅	🔧
no-useless-length-check	Disallow useless array length check.	✅	🔧
no-useless-promise-resolve-reject	Disallow returning/yielding `Promise.resolve/reject()` in async functions or promise callbacks	✅	🔧
no-useless-spread	Disallow unnecessary spread.	✅	🔧
no-useless-switch-case	Disallow useless case in switch statements.	✅		💡
no-useless-undefined	Disallow useless `undefined`.	✅	🔧
no-zero-fractions	Disallow number literals with zero fractions or dangling dots.	✅	🔧
number-literal-case	Enforce proper case for numeric literals.	✅	🔧
numeric-separators-style	Enforce the style of numeric separators by correctly grouping digits.	✅	🔧
prefer-add-event-listener	Prefer `.addEventListener()` and `.removeEventListener()` over `on`-functions.	✅	🔧
prefer-array-find	Prefer `.find(…)` and `.findLast(…)` over the first or last element from `.filter(…)`.	✅	🔧	💡
prefer-array-flat	Prefer `Array#flat()` over legacy techniques to flatten arrays.	✅	🔧
prefer-array-flat-map	Prefer `.flatMap(…)` over `.map(…).flat()`.	✅	🔧
prefer-array-index-of	Prefer `Array#{indexOf,lastIndexOf}()` over `Array#{findIndex,findLastIndex}()` when looking for the index of an item.	✅	🔧	💡
prefer-array-some	Prefer `.some(…)` over `.filter(…).length` check and `.{find,findLast,findIndex,findLastIndex}(…)`.	✅	🔧	💡
prefer-at	Prefer `.at()` method for index access and `String#charAt()`.	✅	🔧	💡
prefer-blob-reading-methods	Prefer `Blob#arrayBuffer()` over `FileReader#readAsArrayBuffer(…)` and `Blob#text()` over `FileReader#readAsText(…)`.	✅
prefer-code-point	Prefer `String#codePointAt(…)` over `String#charCodeAt(…)` and `String.fromCodePoint(…)` over `String.fromCharCode(…)`.	✅		💡
prefer-date-now	Prefer `Date.now()` to get the number of milliseconds since the Unix Epoch.	✅	🔧
prefer-default-parameters	Prefer default parameters over reassignment.	✅	🔧	💡
prefer-dom-node-append	Prefer `Node#append()` over `Node#appendChild()`.	✅	🔧
prefer-dom-node-dataset	Prefer using `.dataset` on DOM elements over calling attribute methods.	✅	🔧
prefer-dom-node-remove	Prefer `childNode.remove()` over `parentNode.removeChild(childNode)`.	✅	🔧	💡
prefer-dom-node-text-content	Prefer `.textContent` over `.innerText`.	✅		💡
prefer-event-target	Prefer `EventTarget` over `EventEmitter`.	✅
prefer-export-from	Prefer `export…from` when re-exporting.	✅	🔧	💡
prefer-global-this	Prefer `globalThis` over `window`, `self`, and `global`.	✅	🔧
prefer-includes	Prefer `.includes()` over `.indexOf()`, `.lastIndexOf()`, and `Array#some()` when checking for existence or non-existence.	✅	🔧	💡
prefer-json-parse-buffer	Prefer reading a JSON file as a buffer.		🔧
prefer-keyboard-event-key	Prefer `KeyboardEvent#key` over `KeyboardEvent#keyCode`.	✅	🔧
prefer-logical-operator-over-ternary	Prefer using a logical operator over a ternary.	✅		💡
prefer-math-min-max	Prefer `Math.min()` and `Math.max()` over ternaries for simple comparisons.	✅	🔧
prefer-math-trunc	Enforce the use of `Math.trunc` instead of bitwise operators.	✅	🔧	💡
prefer-modern-dom-apis	Prefer `.before()` over `.insertBefore()`, `.replaceWith()` over `.replaceChild()`, prefer one of `.before()`, `.after()`, `.append()` or `.prepend()` over `insertAdjacentText()` and `insertAdjacentElement()`.	✅	🔧
prefer-modern-math-apis	Prefer modern `Math` APIs over legacy patterns.	✅	🔧
prefer-module	Prefer JavaScript modules (ESM) over CommonJS.	✅	🔧	💡
prefer-native-coercion-functions	Prefer using `String`, `Number`, `BigInt`, `Boolean`, and `Symbol` directly.	✅	🔧
prefer-negative-index	Prefer negative index over `.length - index` when possible.	✅	🔧
prefer-node-protocol	Prefer using the `node:` protocol when importing Node.js builtin modules.	✅	🔧
prefer-number-properties	Prefer `Number` static properties over global ones.	✅	🔧	💡
prefer-object-from-entries	Prefer using `Object.fromEntries(…)` to transform a list of key-value pairs into an object.	✅	🔧
prefer-optional-catch-binding	Prefer omitting the `catch` binding parameter.	✅	🔧
prefer-prototype-methods	Prefer borrowing methods from the prototype instead of the instance.	✅	🔧
prefer-query-selector	Prefer `.querySelector()` over `.getElementById()`, `.querySelectorAll()` over `.getElementsByClassName()` and `.getElementsByTagName()` and `.getElementsByName()`.	✅	🔧
prefer-reflect-apply	Prefer `Reflect.apply()` over `Function#apply()`.	✅	🔧
prefer-regexp-test	Prefer `RegExp#test()` over `String#match()` and `RegExp#exec()`.	✅	🔧	💡
prefer-set-has	Prefer `Set#has()` over `Array#includes()` when checking for existence or non-existence.	✅	🔧	💡
prefer-set-size	Prefer using `Set#size` instead of `Array#length`.	✅	🔧
prefer-spread	Prefer the spread operator over `Array.from(…)`, `Array#concat(…)`, `Array#{slice,toSpliced}()` and `String#split('')`.	✅	🔧	💡
prefer-string-raw	Prefer using the `String.raw` tag to avoid escaping `\`.	✅	🔧
prefer-string-replace-all	Prefer `String#replaceAll()` over regex searches with the global flag.	✅	🔧
prefer-string-slice	Prefer `String#slice()` over `String#substr()` and `String#substring()`.	✅	🔧
prefer-string-starts-ends-with	Prefer `String#startsWith()` & `String#endsWith()` over `RegExp#test()`.	✅	🔧	💡
prefer-string-trim-start-end	Prefer `String#trimStart()` / `String#trimEnd()` over `String#trimLeft()` / `String#trimRight()`.	✅	🔧
prefer-structured-clone	Prefer using `structuredClone` to create a deep clone.	✅		💡
prefer-switch	Prefer `switch` over multiple `else-if`.	✅	🔧
prefer-ternary	Prefer ternary expressions over simple `if-else` statements.	✅	🔧
prefer-top-level-await	Prefer top-level await over top-level promises and async function calls.	✅		💡
prefer-type-error	Enforce throwing `TypeError` in type checking conditions.	✅	🔧
prevent-abbreviations	Prevent abbreviations.	✅	🔧
relative-url-style	Enforce consistent relative URL style.	✅	🔧	💡
require-array-join-separator	Enforce using the separator argument with `Array#join()`.	✅	🔧
require-number-to-fixed-digits-argument	Enforce using the digits argument with `Number#toFixed()`.	✅	🔧
require-post-message-target-origin	Enforce using the `targetOrigin` argument with `window.postMessage()`.			💡
string-content	Enforce better string content.		🔧	💡
switch-case-braces	Enforce consistent brace style for `case` clauses.	✅	🔧
template-indent	Fix whitespace-insensitive template indentation.	✅	🔧
text-encoding-identifier-case	Enforce consistent case for text encoding identifiers.	✅	🔧	💡
throw-new-error	Require `new` when creating an error.	✅	🔧

Deprecated Rules

See docs/deprecated-rules.md

Preset configs (`eslint.config.js`)

See the ESLint docs for more information about extending config files.

Note: Preset configs will also enable the correct language options.

Recommended config

This plugin exports a recommended config that enforces good practices.

ES Module (Recommended)

import eslintPluginUnicorn from 'eslint-plugin-unicorn';

export default [
		// …
		eslintPluginUnicorn.configs['flat/recommended'],
		{
			rules: {
				'unicorn/better-regex': 'warn',
			},
		},
];

CommonJS

'use strict';
const eslintPluginUnicorn = require('eslint-plugin-unicorn');

module.exports = [
		// …
		eslintPluginUnicorn.configs['flat/recommended'],
		{
			rules: {
				'unicorn/better-regex': 'warn',
			},
		},
];

All config

This plugin exports an all that makes use of all rules (except for deprecated ones).

ES Module (Recommended)

import eslintPluginUnicorn from 'eslint-plugin-unicorn';

export default [
		// …
		eslintPluginUnicorn.configs['flat/all'],
		{
			rules: {
				'unicorn/better-regex': 'warn',
			},
		},
];

CommonJS

'use strict';
const eslintPluginUnicorn = require('eslint-plugin-unicorn');

module.exports = [
		// …
		eslintPluginUnicorn.configs['flat/all'],
		{
			rules: {
				'unicorn/better-regex': 'warn',
			},
		},
];

Legacy preset configs (`.eslintrc.*` or `package.json`)

See the ESLint docs for more information about extending deprecated legacy config files.

Note: Preset configs will also enable the correct parser options and environment.

Recommended legacy config

This plugin exports a recommended legacy config that enforces good practices.

{
	"name": "my-awesome-project",
	"eslintConfig": {
		"extends": "plugin:unicorn/recommended",
		"rules": {
			"unicorn/better-regex": "warn"
		}
	}
}

All legacy config

This plugin exports an all legacy config that makes use of all rules (except for deprecated ones).

{
	"name": "my-awesome-project",
	"eslintConfig": {
		"extends": "plugin:unicorn/all"
	}
}

Maintainers

Former

eslint-plugin-unicorn dependencies

@babel/helper-validator-identifier @eslint-community/eslint-utils ci-info clean-regexp core-js-compat esquery globals indent-string is-builtin-module jsesc pluralize read-pkg-up regexp-tree regjsparser semver strip-indent

FAQs

What is eslint-plugin-unicorn?

More than 100 powerful ESLint rules. Visit Snyk Advisor to see a full health score report for eslint-plugin-unicorn, including popularity, security, maintenance & community analysis.

Is eslint-plugin-unicorn popular?

The npm package eslint-plugin-unicorn receives a total of 2,492,593 weekly downloads. As such, eslint-plugin-unicorn popularity was classified as a key ecosystem project. Visit the popularity section on Snyk Advisor to see the full health analysis.

Is eslint-plugin-unicorn well maintained?

We found that eslint-plugin-unicorn demonstrated a healthy version release cadence and project activity. It has a community of 150 open source contributors collaborating on the project. See the full package health analysis to learn more about the package maintenance status.

Is eslint-plugin-unicorn safe to use?

The npm package eslint-plugin-unicorn was scanned for known vulnerabilities and missing license, and no issues were found. Thus the package was deemed as safe to use. See the full health analysis review.

Last updated on 21 December-2024, at 01:17 (UTC).

Build a secure application checklist

Select a recommended open source package

Minimize your risk by selecting secure & well maintained open source packages

DONE

Scan your app for vulnerabilities

Scan your application to find vulnerabilities in your: source code, open source dependencies, containers and configuration files

SCAN NOW

Fix identified vulnerabilities

Easily fix your code by leveraging automatically generated PRs

AUTO FIX

Monitor for new issues

New vulnerabilities are discovered every day. Get notified if your application is affected

MONITOR APP

Package Health Score

Explore Similar Packages

Security and license risk for significant versions

Is your project affected by vulnerabilities?

Weekly Downloads (2,492,593)

Direct Usage Popularity

Embed Package Health Score Badge

Commit Frequency

Keep your project healthy

Check your package.json

Snyk Vulnerability Scanner

Readme

eslint-plugin-unicorn

Install

Usage (eslint.config.js)

ES Module (Recommended)

CommonJS

Usage (legacy: .eslintrc.* or package.json)

Rules

Deprecated Rules

Preset configs (eslint.config.js)

Recommended config

ES Module (Recommended)

CommonJS

All config

ES Module (Recommended)

CommonJS

Legacy preset configs (.eslintrc.* or package.json)

Recommended legacy config

All legacy config

Maintainers

Former

eslint-plugin-unicorn dependencies

eslint-plugin-unicorn development dependencies

FAQs

What is eslint-plugin-unicorn?

Is eslint-plugin-unicorn popular?

Is eslint-plugin-unicorn well maintained?

Is eslint-plugin-unicorn safe to use?

Build a secure application checklist

Select a recommended open source package

Scan your app for vulnerabilities

Source Code

Open Source

Container

Config

Fix identified vulnerabilities

Monitor for new issues

Usage (`eslint.config.js`)

Usage (legacy: `.eslintrc.*` or `package.json`)

Preset configs (`eslint.config.js`)

Legacy preset configs (`.eslintrc.*` or `package.json`)