EC
TS1196
TypeScriptERRORNotableSyntaxHIGH confidence

Catch clause variable type annotation must be 'any' or 'unknown' if specified.

Production Risk

Build will fail; resolve before shipping.

What this means

A syntax error (TS1196): Catch clause variable type annotation must be 'any' or 'unknown' if specified.. This diagnostic is emitted by the TypeScript compiler when catch clause variable type annotation must be 'any' or 'unknown' if specified..

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

TypeScript compiler reports TS1196 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS1196
// Catch clause variable type annotation must be 'any' or 'unknown' if specified.

expected output

error TS1196: Catch clause variable type annotation must be 'any' or 'unknown' if specified.

Fix

Address the TypeScript diagnostic

WHEN When this error is reported by the compiler

Address the TypeScript diagnostic
// Run the TypeScript compiler for details:
npx tsc --noEmit
// Use the TypeScript playground to test your code:
// https://www.typescriptlang.org/play

Why this works

Review the full error message and location; the TypeScript handbook provides guidance on each error category.

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

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