EC
TS6304
TypeScriptERRORNotableConfigHIGH confidence

Composite projects may not disable declaration emit.

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6304): Composite projects may not disable declaration emit.. This diagnostic is emitted by the TypeScript compiler when composite projects may not disable declaration emit..

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

TypeScript compiler reports TS6304 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6304
// Composite projects may not disable declaration emit.

expected output

error TS6304: Composite projects may not disable declaration emit.

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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