sindresorhus / eslint-plugin-unicorn

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 **Requires ESLint , flat config, and ESM.** Usage Use a preset config or configure each rule in . If you don't use the preset, ensure you use the same config as below. Rules 💼 Configurations enabled in.\ ✅ Set in the configuration.\ ☑️ Set in the configuration.\ 🔧 Automatically fixable by the 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-assert | Enforce consistent assertion style with . | ✅ | 🔧 | | | consistent-date-clone | Prefer passing directly to the constructor when cloning. | ✅ ☑️ | 🔧 | | | 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 , , , and . | ✅ ☑️ | 🔧 | | | consistent-function-scoping | Move function definitions to the highest possible scope. | ✅ | | | | consistent-template-literal-escape | Enforce consistent style for escaping in template literals. | ✅ | 🔧 | | | custom-error-definition | Enforce correct subclassing. | | 🔧 | | | empty-brace-spaces | Enforce no spaces between braces. | ✅ | 🔧 | | | error-message | Enforce passing a value when creating a built-in error. | ✅ ☑️ | | | | escape-case | Require escape sequences to use uppercase or lowercase values. | ✅ ☑️ | 🔧 | | | expiring-todo-comments | Add expiration conditions to TODO comments. | ✅ ☑️ | | | | explicit-length-check | Enforce explicitly comparing the or property of a value. | ✅ | 🔧 | 💡 | | filename-case | Enforce a case style for filenames. | ✅ | | | | import-style | Enforce specific import styles per module. | ✅ ☑️ | | | | isolated-functions | Prevent usage of variables from outside the scope of isolated functions. | ✅ | | | | new-for-builtins | Enforce the use of for all builtins, except , , , and . | ✅ ☑️ | 🔧 | 💡 | | no-abusive-eslint-disable | Enforce specifying rules to disable in comments. | ✅ ☑️ | | | | no-accessor-recursion | Disallow recursive access to within getters and setters. | ✅ ☑️ | | | | 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 over the method. | ✅ ☑️ | 🔧 | 💡 | | no-array-method-this-argument | Disallow using the argument in array methods. | ✅ ☑️ | 🔧 | 💡 | | no-array-reduce | Disallow and . | ✅ | | | | no-array-reverse | Prefer over . | ✅ ☑️ | | 💡 | | no-array-sort | Prefer over . | ✅ ☑️ | | 💡 | | no-await-expression-member | Disallow member access from await expression. | ✅ | 🔧 | | | no-await-in-promise-methods | Disallow using in method parameters. | ✅ ☑️ | | 💡 | | no-console-spaces | Do not use leading/trailing space between parameters. | ✅ ☑️ | 🔧 | | | no-document-cookie | Do not use directly. | ✅ ☑️ | | | | no-empty-file | Disallow empty files. | ✅ ☑️ | | | | no-for-loop | Do not use a loop that can be replaced with a loop. | ✅ | 🔧 | 💡 | | no-hex-escape | Enforce the use of Unicode escapes instead of hexadecimal escapes. | ✅ ☑️ | 🔧 | | | no-immediate-mutation | Disallow immediate mutation after variable assignment. | ✅ | 🔧 | 💡 | | no-instanceof-builtins | Disallow with built-in objects | ✅ ☑️ | 🔧 | 💡 | | no-invalid-fetch-options | Disallow invalid options in and . | ✅ ☑️ | | | | no-invalid-remove-event-listener | Prevent calling with the result of an expression. | ✅ ☑️ | | | | no-keyword-prefix | Disallow identifiers starting with or . | | | | | no-lonely-if | Disallow statements as the only statement in blocks without . | ✅ ☑️ | 🔧 | | | no-magic-array-flat-depth | Disallow a magic number as the argument in | ✅ ☑️ | | | | no-named-default | Disallow named usage of default import and export. | ✅ ☑️ | 🔧 | | | 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 . | ✅ ☑️ | 🔧 | 💡 | | no-new-buffer | Enforce the use of and instead of the deprecated . | ✅ ☑️ | 🔧 | 💡 | | no-null | Disallow the use of the literal. | ✅ | 🔧 | 💡 | | no-object-as-default-parameter | Disallow the use of objects as default parameters. | ✅ ☑️ | | | | no-process-exit | Disallow . | ✅ ☑️ | | | | no-single-promise-in-promise-methods | Disallow passing single-element arrays to methods. _...truncated for preview_