'X' implicitly has return type 'any' because it does not have a return type a...
Production Risk
Build will fail; resolve before shipping.
A strict mode error (TS7023): 'X' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.. This diagnostic is emitted by the TypeScript compiler when 'X' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions..
- 1TypeScript cannot infer the type and defaults to 'any' with --noImplicitAny
- 2Missing type annotation or type parameter
TypeScript compiler reports TS7023 during type checking.
// Triggers TS7023 // 'X' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
expected output
error TS7023: 'X' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
Fix
Add an explicit type annotation
WHEN When TypeScript cannot infer the type
// Before (implicit any)
function process(value) { return value; }
// After (explicit type)
function process(value: string): string { return value; }Why this works
Adding explicit type annotations removes the implicit 'any' and enables full type checking.
✕ Suppress with @ts-ignore instead of fixing the type
ts-ignore hides real type errors and makes refactoring unsafe.
TypeScript Compiler Diagnostics
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