Print names of generated files part of the compilation to the terminal.

This flag is useful in two cases:

• You want to transpile TypeScript as a part of a build chain in the terminal where the filenames are processed in the next command.
• You are not sure that TypeScript has included a file you expected, as a part of debugging the file inclusion settings.

For example:

example
├── index.ts
├── package.json
└── tsconfig.json

example
├── index.ts
├── package.json
└── tsconfig.json

With:

{
  "compilerOptions": {
    "declaration": true,
    "listFiles": true
  }
}

{
  "compilerOptions": {
    "declaration": true,
    "listFiles": true
  }
}

Would echo paths like:

$ npm run tsc

path/to/example/index.js
path/to/example/index.d.ts

$ npm run tsc

path/to/example/index.js
path/to/example/index.d.ts

Normally, TypeScript would return silently on success.