vscode-extension-samples/notebook-renderer-react-sample/src/client/tsconfig.json

{
  "extends": "../tsconfig-base.json",
  "compilerOptions": {
    "jsx": "react",
    // noEmit prevents the default tsc from building this--we use webpack instead
    "noEmit": true,
    "rootDir": ".",
    "module": "esnext",
    "lib": ["ES2019", "dom"],
    "types": ["webpack-env", "vscode-notebook-renderer"],
    "allowSyntheticDefaultImports": true
  }
}