ts-jest/tsconfig.base.json

A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript

{
  "compilerOptions": {
    "strict": true,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "skipLibCheck": true,
    "esModuleInterop": true,
    "resolveJsonModule": true,
    "checkJs": false,
    "target": "ESNext",
    "module": "NodeNext",
    "moduleResolution": "NodeNext",
    "lib": ["ESNext"]
  }
}