vscode-extension-samples/notebook-extend-markdown-renderer-sample/tsconfig.json

{
  "compilerOptions": {
    "rootDir": "src",
    "outDir": "out",
    "module": "esnext",
    "target": "es2020",
    "lib": [
      "es2020",
      "dom"
    ],
    "moduleResolution": "node",
    "sourceMap": true,
    "strict": true
  }
}