Require Rules | eslint-plugin-tsconfig

📄️require-bundler-module-resolution

Require a modern resolution mode for bundler-oriented module settings.

Require composite:true in a tsconfig that defines project references.

Require declarationMap:true alongside explicit declaration:true so editors can navigate from .d.ts files back to TypeScript source.

Require declaration:true when composite is enabled.

Require downlevelIteration when using ES2015+ iterators with an ES5 target.

Require exactOptionalPropertyTypes for precise optional-property semantics.

Require node_modules and dist in an explicit exclude array.

Require forceConsistentCasingInFileNames:true to prevent cross-platform import resolution failures.

Require isolatedDeclarations:true for libraries to enable fast single-file declaration emit without full type resolution.

Require isolatedModules:true for compatibility with single-file transpilers like Vite, esbuild, and SWC.

Require noFallthroughCasesInSwitch:true to report switch cases that fall through without break, return, or throw.

Require noImplicitOverride to prevent accidental method overrides.

Require noImplicitReturns:true to catch functions that silently return undefined on some code paths.

Require noPropertyAccessFromIndexSignature:true to enforce bracket notation for index-signature access.

Require noUncheckedIndexedAccess for safer array and index-signature access.

Require noUnusedLocals:true to report declared but unused local variables and imports.

Require noUnusedParameters:true to report declared but unused function parameters.

Require outDir when the project emits JavaScript output.

Require source maps to be enabled in tsconfig files that emit JavaScript.

Require strict:true in compilerOptions for full type safety.

Require useUnknownInCatchVariables:true so catch-clause variables are typed as unknown instead of any.

Require verbatimModuleSyntax for correct ESM type-import behavior.