tsconfig.json

{
  "compilerOptions": {
    "moduleResolution": "node",
    "module": "es2020",
    "lib": [
      "es2020",
      "DOM"
    ],
    "target": "es2019",
    /**
        svelte-preprocess cannot figure out whether you have a value or a type, so tell TypeScript
        to enforce using \`import type\` instead of \`import\` for Types.
        */
    "importsNotUsedAsValues": "error",
    "isolatedModules": true,
    "resolveJsonModule": true,
    /**
        To have warnings/errors of the Svelte compiler at the correct position,
        enable source maps by default.
        */
    "sourceMap": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "baseUrl": ".",
    "allowJs": true,
    "checkJs": true,
    "paths": {
      "$lib": [
        "src/lib"
      ],
      "$lib/*": [
        "src/lib/*"
      ]
    }
  },
  "include": [
    "src/**/*.d.ts",
    "src/**/*.js",
    "src/**/*.ts",
    "src/**/*.svelte"
  ]
}