EC
TS6238
TypeScriptERRORNotableConfigHIGH confidence

Specify the module specifier to be used to import the 'jsx' and 'jsxs' factor...

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6238): Specify the module specifier to be used to import the 'jsx' and 'jsxs' factory functions from. eg, react. This diagnostic is emitted by the TypeScript compiler when specify the module specifier to be used to import the 'jsx' and 'jsxs' factory functions from. eg, react.

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 TS6238 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6238
// Specify the module specifier to be used to import the 'jsx' and 'jsxs' factory functions from. eg, react

expected output

error TS6238: Specify the module specifier to be used to import the 'jsx' and 'jsxs' factory functions from. eg, react

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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