EC
TS6606
TypeScriptERRORNotableConfigHIGH confidence

Have recompiles in projects that use 'incremental' and 'watch' mode assume th...

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6606): Have recompiles in projects that use 'incremental' and 'watch' mode assume that changes within a file will only affect files directly depending on it.. This diagnostic is emitted by the TypeScript compiler when have recompiles in projects that use 'incremental' and 'watch' mode assume that changes within a file will only affect files directly depending on it..

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

TypeScript compiler reports TS6606 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6606
// Have recompiles in projects that use 'incremental' and 'watch' mode assume that changes within a file will only affect files directly depending on it.

expected output

error TS6606: Have recompiles in projects that use 'incremental' and 'watch' mode assume that changes within a file will only affect files directly depending on it.

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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