EC
TS6112
TypeScriptERRORNotableConfigHIGH confidence

Do not emit 'use strict' directives in module output.

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6112): Do not emit 'use strict' directives in module output.. This diagnostic is emitted by the TypeScript compiler when do not emit 'use strict' directives in module output..

Why it happens
  1. 1Incorrect TypeScript syntax or type usage
  2. 2Type mismatch between declared and actual value
How to reproduce

TypeScript compiler reports TS6112 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6112
// Do not emit 'use strict' directives in module output.

expected output

error TS6112: Do not emit 'use strict' directives in module output.

Fix

Fix the tsconfig.json option

WHEN When a compiler option is invalid or missing

Fix the tsconfig.json option
// tsconfig.json
{
  "compilerOptions": {
    // Review and correct the flagged option
  }
}
// Run: npx tsc --showConfig to see effective config

Why this works

TypeScript validates tsconfig.json options; check the official tsconfig reference for valid values.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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