EC
TS4050
TypeScriptERRORNotableDeclarationHIGH confidence

Return type of public static method from exported class has or is using name ...

Production Risk

Build will fail; resolve before shipping.

What this means

A declaration emit error (TS4050): Return type of public static method from exported class has or is using name 'X' from external module X but cannot be named.. This diagnostic is emitted by the TypeScript compiler when return type of public static method from exported class has or is using name 'X' from external module X but cannot be named..

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

TypeScript compiler reports TS4050 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS4050
// Return type of public static method from exported class has or is using name 'X' from external module X but cannot be named.

expected output

error TS4050: Return type of public static method from exported class has or is using name 'X' from external module X but cannot be named.

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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