EC
TS2652
TypeScriptERRORNotableTypeHIGH confidence

Merged declaration 'X' cannot include a default export declaration. Consider ...

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2652): Merged declaration 'X' cannot include a default export declaration. Consider adding a separate 'export default X' declaration instead.. This diagnostic is emitted by the TypeScript compiler when merged declaration 'X' cannot include a default export declaration. Consider adding a separate 'export default X' declaration instead..

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

TypeScript compiler reports TS2652 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2652
// Merged declaration 'X' cannot include a default export declaration. Consider adding a separate 'export default X' declaration instead.

expected output

error TS2652: Merged declaration 'X' cannot include a default export declaration. Consider adding a separate 'export default X' declaration instead.

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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