EC
TS6803
TypeScriptERRORNotableConfigHIGH confidence

Default catch clause variables as 'unknown' instead of 'any'.

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6803): Default catch clause variables as 'unknown' instead of 'any'.. This diagnostic is emitted by the TypeScript compiler when default catch clause variables as 'unknown' instead of 'any'..

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

TypeScript compiler reports TS6803 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6803
// Default catch clause variables as 'unknown' instead of 'any'.

expected output

error TS6803: Default catch clause variables as 'unknown' instead of 'any'.

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.

What not to do

✕ Suppress with @ts-ignore instead of fixing the type

ts-ignore hides real type errors and makes refactoring unsafe.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev

← All TypeScript errors