EC
TS2609
TypeScriptERRORNotableTypeHIGH confidence

JSX spread child must be an array type.

Production Risk

Build will fail; resolve before shipping.

What this means

A type-checking error (TS2609): JSX spread child must be an array type.. This diagnostic is emitted by the TypeScript compiler when jSX spread child must be an array type..

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 TS2609 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS2609
// JSX spread child must be an array type.

expected output

error TS2609: JSX spread child must be an array type.

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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