EC
TS2639
TypeScriptERRORNotableTypeHIGH confidence

React components cannot include JSX namespace names

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2639): React components cannot include JSX namespace names. This diagnostic is emitted by the TypeScript compiler when react components cannot include JSX namespace names.

Why it happens
  1. 1JSX syntax used without enabling '--jsx' compiler option
  2. 2Missing React or JSX runtime import
How to reproduce

TypeScript compiler reports TS2639 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2639
// React components cannot include JSX namespace names

expected output

error TS2639: React components cannot include JSX namespace names

Fix

Enable JSX in tsconfig.json

WHEN Using JSX syntax in TypeScript files

Enable JSX in tsconfig.json
// tsconfig.json
{
  "compilerOptions": {
    "jsx": "react-jsx"  // or "react", "preserve", etc.
  }
}

Why this works

The '--jsx' option tells TypeScript how to transform JSX; choose 'react-jsx' for React 17+ or 'react' for older versions.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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