astro/examples/framework-preact/tsconfig.json

{
  "compilerOptions": {
    // Preact specific settings
    "jsx": "react-jsx",
    "jsxImportSource": "preact",
    // Enable top-level await, and other modern ESM features.
    "target": "ESNext",
    "module": "ESNext",
    // Enable node-style module resolution, for things like npm package imports.
    "moduleResolution": "node",
    // Enable JSON imports.
    "resolveJsonModule": true,
    // Enable stricter transpilation for better output.
    "isolatedModules": true,
    // Astro will directly run your TypeScript code, no transpilation needed.
    "noEmit": true
  }
}