🔒 strict-mode

Rules that enforce TypeScript strict mode options beyond the base strict flag, including exactOptionalPropertyTypes, noUncheckedIndexedAccess, noImplicitOverride, and similar settings.

Config key

tsconfig.configs["strict-mode"]

Flat Config example

import tsconfig from "eslint-plugin-tsconfig";

export default [tsconfig.configs["strict-mode"]];

Rules in this preset

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

Rule	Fix
no-disable-strict-subset	—
no-suppress-implicit-any-index-errors	—
require-exact-optional-property-types	🔧
require-no-fallthrough-cases-in-switch	🔧
require-no-implicit-override	🔧
require-no-implicit-returns	🔧
require-no-property-access-from-index-signature	🔧
require-no-unchecked-indexed-access	🔧
require-no-unused-locals	🔧
require-no-unused-parameters	🔧
require-strict-mode	🔧
require-use-unknown-in-catch-variables	🔧

Related presets

Preset	Description
🟡 recommended	Default baseline for most TypeScript codebases
🔴 strict	Recommended plus a richer set of safety rules
🟣 all	Every rule, including experimental coverage
📤 emit-config	Best practices for TypeScript emit/output configuration
🧹 include-hygiene	Clean include, exclude, and files patterns
🎯 lib-target	Consistency between target, lib, and downlevelling
📦 module-resolution	Modern and consistent module resolution settings
🔗 project-references	Correct TypeScript project references setup