npm-dts (fork)

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.

About This Fork

This fork includes the --customAlias and the --shake options. They will hopefully be included in the original some time.

The most recent (but experimental) addition is also copy existing d.ts files, which may be included in the source. This is useful, when there are d.ts files that describe the API of a .js file in your code base.

Unfortunately there is no way to include ambient declarations in the bundle. A d.ts file that has no exports will have no effects.

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Installation

Local:

npm install --save-dev npm-dts

Global:

npm install -g npm-dts

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CLI Usage

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

Supported options

npm-dts [options] generate

Option	Alias	Description
--entry [file]	-e [file]	Allows changing main src file from index.ts to something else. It can also be declared as a path, relative to root.
--force	-f	Ignores non-critical errors and attempts to at least partially generate typings (disabled by default).
--customAlias	-a	Instead of an alias, use the given template, where {main-module} is replaced with the name/path of the entry module and {package-name} is replaced with the name of the package.
--help	-h	Output usage information.
--logLevel [level]	-L [level]	Log level (error, warn, info, verbose, debug) (defaults to "info").
--output [file]	-o [file]	Overrides recommended output target to a custom one (defaults to "index.d.ts").
--shake	-s	Basic tree-shaking for modules. (off (default), referencedOnly). referencedOnly drops modules not referenced by the entry module.
--root [path]	-r [path]	NPM package directory containing package.json (defaults to current working directory).
--tmp [path]	-t [path]	Directory for storing temporary information (defaults to OS-specific temporary directory). Note that tool completely deletes this folder once finished.
--tsc [options]	-c [options]	Passed through additional TSC options (defaults to ""). Note that they are not validated or checked for suitability. When passing through CLI it is recommended to surround arguments in quotes and start with a space (work-around for a bug in argument parsing dependency of npm-dts).
--version	-v	Output the version number.

Integration using WebPack

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

Integration into NPM scripts

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.

Integration into custom solution

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()

Additional arguments

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.