EC
TS2344
TypeScriptERRORNotableTypeHIGH confidence

Type 'X' does not satisfy the constraint 'X'.

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2344): Type 'X' does not satisfy the constraint 'X'.. This diagnostic is emitted by the TypeScript compiler when type 'X' does not satisfy the constraint 'X'..

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

TypeScript compiler reports TS2344 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2344
// Type 'X' does not satisfy the constraint 'X'.

expected output

error TS2344: Type 'X' does not satisfy the constraint 'X'.

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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