EC
TS6141
TypeScriptERRORNotableConfigHIGH confidence

Parse in strict mode and emit "use strict" for each source file.

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6141): Parse in strict mode and emit "use strict" for each source file.. This diagnostic is emitted by the TypeScript compiler when parse in strict mode and emit "use strict" for each source file..

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

TypeScript compiler reports TS6141 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6141
// Parse in strict mode and emit "use strict" for each source file.

expected output

error TS6141: Parse in strict mode and emit "use strict" for each source file.

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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