by Vytenis Urbonavičius

This utility generates single index.d.ts file for whole NPM package.

It allows creating bundled NPM library packages without TypeScript sources and yet still keeping code suggestions wherever these libraries are imported.

TypeScript picks up index.d.ts automatically.

Local:

npm install --save-dev npm-dts

Global:

npm install -g npm-dts

Please make sure that target project has "typescript" installed in node_modules.

To see full CLI help - run without arguments:

npm-dts

Typical usage (using global install):

cd /your/project
npm-dts generate

npm-dts [options] generate

You would want to use "npm-dts-webpack-plugin" package instead.

Example of how you could run generation of index.d.ts automatically before every publish.

{
  // ......
  "scripts": {
    "prepublishOnly": "npm run dts && ......",
    "dts": "./node_modules/.bin/npm-dts generate"
  }
  // ......
}

Another possible option would be to execute "npm run dts" as part of bundling task.

This approach can be used for integration with tools such as WebPack.

Simple usage with all default values:

import {Generator} from 'npm-dts'
new Generator({}).generate()

Advanced usage example with some arguments overridden:

import * as path from 'path'
import {Generator} from 'npm-dts'

new Generator({
  entry: 'main.ts',
  root: path.resolve(process.cwd(), 'project'),
  tmp: path.resolve(process.cwd(), 'cache/tmp'),
  tsc: '--extendedDiagnostics',
}).generate()

Above examples were in TypeScript. Same in plain JavaScript would look like this:

const path = require('path')

new (require('npm-dts').Generator)({
  entry: 'main.ts',
  root: path.resolve(process.cwd(), 'project'),
  tmp: path.resolve(process.cwd(), 'cache/tmp'),
  tsc: '--extendedDiagnostics',
}).generate()

Constructor of generator also supports two more boolean flags as optional arguments:

• Enable log
• Throw exception on error

Initializing without any options will cause npm-cli to read CLI arguments all by itself.