🔴 Strict

Use when you want recommended-type-checked + additional stable runtime helpers.

Config key

typefest.configs.strict

Flat Config example

import typefest from "eslint-plugin-typefest";

export default [typefest.configs.strict];

Rules in this preset

• Fix legend:
  • 🔧 = autofixable
  • 💡 = suggestions available
  • — = report only

Rule	Fix
prefer-ts-extras-array-at	🔧
prefer-ts-extras-array-concat	🔧
prefer-ts-extras-array-find-last	🔧
prefer-ts-extras-array-first	🔧 💡
prefer-ts-extras-array-includes	🔧 💡
prefer-ts-extras-array-join	🔧
prefer-ts-extras-array-last	🔧 💡
prefer-ts-extras-as-writable	🔧
prefer-ts-extras-assert-defined	🔧 💡
prefer-ts-extras-assert-error	💡
prefer-ts-extras-assert-present	🔧 💡
prefer-ts-extras-is-defined	🔧
prefer-ts-extras-is-defined-filter	🔧
prefer-ts-extras-is-empty	🔧
prefer-ts-extras-is-finite	🔧
prefer-ts-extras-is-infinite	🔧
prefer-ts-extras-is-integer	🔧
prefer-ts-extras-is-present	🔧
prefer-ts-extras-is-present-filter	🔧
prefer-ts-extras-is-safe-integer	🔧
prefer-ts-extras-key-in	🔧
prefer-ts-extras-not	🔧
prefer-ts-extras-object-entries	🔧
prefer-ts-extras-object-from-entries	🔧
prefer-ts-extras-object-has-in	🔧 💡
prefer-ts-extras-object-has-own	🔧 💡
prefer-ts-extras-object-keys	🔧
prefer-ts-extras-object-values	🔧
prefer-ts-extras-safe-cast-to	🔧
prefer-ts-extras-set-has	🔧 💡
prefer-ts-extras-string-split	🔧
prefer-type-fest-abstract-constructor	🔧
prefer-type-fest-and-all	🔧
prefer-type-fest-array-length	🔧
prefer-type-fest-arrayable	🔧
prefer-type-fest-async-return-type	🔧
prefer-type-fest-conditional-pick	🔧
prefer-type-fest-conditional-pick-deep	🔧
prefer-type-fest-constructor	🔧
prefer-type-fest-except	🔧
prefer-type-fest-if	🔧
prefer-type-fest-iterable-element	🔧
prefer-type-fest-json-array	🔧
prefer-type-fest-json-object	🔧
prefer-type-fest-json-primitive	🔧
prefer-type-fest-json-value	💡
prefer-type-fest-keys-of-union	🔧
prefer-type-fest-less-than	🔧
prefer-type-fest-less-than-or-equal	🔧
prefer-type-fest-literal-union	🔧
prefer-type-fest-merge-exclusive	🔧
prefer-type-fest-non-empty-tuple	🔧
prefer-type-fest-omit-index-signature	🔧
prefer-type-fest-optional	🔧
prefer-type-fest-or-all	🔧
prefer-type-fest-partial-deep	🔧
prefer-type-fest-primitive	🔧
prefer-type-fest-promisable	🔧
prefer-type-fest-readonly-deep	🔧
prefer-type-fest-require-all-or-none	🔧
prefer-type-fest-require-at-least-one	🔧
prefer-type-fest-require-exactly-one	🔧
prefer-type-fest-require-one-or-none	🔧
prefer-type-fest-required-deep	🔧
prefer-type-fest-schema	🔧
prefer-type-fest-set-non-nullable	🔧
prefer-type-fest-set-optional	🔧
prefer-type-fest-set-readonly	🔧
prefer-type-fest-set-required	🔧
prefer-type-fest-simplify	🔧
prefer-type-fest-tagged-brands	🔧
prefer-type-fest-tuple-of	🔧
prefer-type-fest-union-member	🔧
prefer-type-fest-union-to-tuple	🔧
prefer-type-fest-unknown-array	🔧
prefer-type-fest-unknown-map	🔧
prefer-type-fest-unknown-record	🔧
prefer-type-fest-unknown-set	🔧
prefer-type-fest-unwrap-tagged	🔧
prefer-type-fest-value-of	🔧
prefer-type-fest-writable	🔧
prefer-type-fest-writable-deep	🔧