EC
TS6804
TypeScriptERRORNotableConfigHIGH confidence

Do not transform or elide any imports or exports not marked as type-only, ens...

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6804): Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting.. This diagnostic is emitted by the TypeScript compiler when do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting..

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

TypeScript compiler reports TS6804 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6804
// Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting.

expected output

error TS6804: Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting.

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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