The right-hand side of a 'for...in' statement must be of type 'any', an objec...
Production Risk
Build will fail; resolve before shipping.
A type-checking error (TS2407): The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter, but here has type 'X'.. This diagnostic is emitted by the TypeScript compiler when the right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter, but here has type 'X'..
- 1Incorrect number or type of generic type arguments
TypeScript compiler reports TS2407 during type checking.
// Triggers TS2407 // The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter, but here has type 'X'.
expected output
error TS2407: The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter, but here has type 'X'.
Fix
Address the TypeScript diagnostic
WHEN When this error is reported by the compiler
// 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.
✕ Suppress with @ts-ignore instead of fixing the type
ts-ignore hides real type errors and makes refactoring unsafe.
TypeScript Compiler Diagnostics
Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev