TS2534
TypeScriptERRORNotableTypeHIGH confidence
A function returning 'never' cannot have a reachable end point.
Production Risk
Build will fail; resolve before shipping.
What this means
A type-checking error (TS2534): A function returning 'never' cannot have a reachable end point.. This diagnostic is emitted by the TypeScript compiler when a function returning 'never' cannot have a reachable end point..
Why it happens
- 1A code path that should return a value returns never instead, or vice versa
How to reproduce
TypeScript compiler reports TS2534 during type checking.
trigger — this will error
trigger — this will error
// Triggers TS2534 // A function returning 'never' cannot have a reachable end point.
expected output
error TS2534: A function returning 'never' cannot have a reachable end point.
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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