tsconfig.json

{
  "extends": "@shopify/typescript-configs/library",
  "compilerOptions": {
    "composite": true,
    "emitDeclarationOnly": true,
    "outDir": "build/ts",
    "rootDir": "./",
    "strictFunctionTypes": false,
    "emitDecoratorMetadata": false,
    "experimentalDecorators": false,
    "paths": {
      "shared/*": ["./src/shared/*"],
      "helper": ["./test/helper.ts"]
    }
  },
  "include": [
    "./config/typescript/**/*",
    "./src/**/*",
    "./test/**/*",
    "./rollup.config.ts",
    "./rollup.development.config.ts"
  ]
}