EC
TS2331
TypeScriptERRORNotableTypeHIGH confidence

'this' cannot be referenced in a module or namespace body.

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2331): 'this' cannot be referenced in a module or namespace body.. This diagnostic is emitted by the TypeScript compiler when 'this' cannot be referenced in a module or namespace body..

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

TypeScript compiler reports TS2331 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2331
// 'this' cannot be referenced in a module or namespace body.

expected output

error TS2331: 'this' cannot be referenced in a module or namespace body.

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.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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