---
name: config
---
# Configuration
npmts can be configured to your needs.

### npmextra.json
the npmts section in npmextra.json can be used to configure npmts.

**Default**
>Note: When you are using `"mode":"default"` it'll cause npmts to override any other settings you may have made except for tsOptions (ES target etc.)
with default behaviour.

```json
{
  "npmts":{
    "mode":"default"
  }
}
```

**Custom settings**
```json
{
  "mode":"custom",
  "test":true,
  "npmts":{
    "ts":{
      "./customdir/*.ts":"./"
    },
    "tsOptions":{
      "declaration":false,
      "target":"ES6"
    },
    "cli":true
  }
}
```

| key | default value | description |
| --- | --- | --- |
| `"mode"` | `"default"` | "default" will do default stuff and override , "custom" only does what you specify, "merge" will merge default options with whatever you specify on your own |
| `"test"` | `true` | test your module |
| `"ts"` | `{"./ts/*.ts":"./","./test/test.ts":"./test/"}` | allows you to define multiple ts portions |
| `"tsOptions"` | `{"target":"ES5", "declaration":"true"}` | specify options for tsc |
| `"cli"` | `"false"` | some modules are designed to be used from cli. If set to true NPMTS will create a cli.js that wires you dist files up for cli use. |
| `"testConfig"` | `{ parallel: true, coverage: true }` | allows you to control test behaviour. `"parallel"` controls wether testfiles are run sequentially or in parallel, and `"coverage` wether to create coverage reports |

### TypeScript
by default npmts looks for `./ts/*.ts` and `./test/test.ts` that will compile to
`./dist/*.js` and `./test/test.js`

Use commonjs module system for wiring up files.

### Declaration files
**npmts** also creates declaration files like `./dist/index.d.ts` by default.
You can reference it in your package.json like this.

```json
"main": "dist/index.js",
"typings": ".dist/index.d.ts",
```

This is in line with the latest TypeScript best practices.
You can then import plugins via the TypeScript `import` Syntax
and tsc will pick up the declaration file automatically.

## Some notes:
#### Typings for third party modules that do not bundle declaration files
NPMTS no longer supports typings.json. Instead use the new TypeScript 2.x approach to typings using the @types/ npm scope.

#### Instrumentalize Code
npmts instrumentalizes (using istanbul) the created JavaScript code to create a coverage report.

#### Tests
Any errors will be shown with reference to their originating source in TypeScript
thanks to autogenerated source maps.