Check if an NPM package name is taken.

Validates an NPM package name and then checks if a conflicting package exists. Also accounts for punctuation differences.

Installation

yarn add is-name-taken

npm install is-name-taken

API

import { isTaken, isValid } from "is-name-taken";

// Check if a package name is taken, and if so, return the conflict:

isTaken("ch-alk"); // "chalk"

// If not taken, return false

isTaken("package-that-doesnt-exist"); // false

// If invalid, return true

isTaken("INVALID_NAME"); // true

// Check if a package name is valid

isValid("chalk"); // true

isValid("INVALID_NAME"); // false

Types:

import { Options } from "is-name-taken";

type Options = {
  /**
   * Maximum milliseconds after a sync to avoid re-syncing
   */
  maxAge?: number;
  /**
   * Setting optimistic to true will skip syncing latest packages from NPM.
   * This is faster, but may lead to inconsistencies with recently published packages.
   */
  optimistic?: boolean;
};

function isValid(name: string): boolean;

function isTaken(name: string, options?: Options): Promise<string | boolean>;

• all-package-names: Get all NPM package names
• package-name-conflict: Check if NPM package names conflict
• validate-npm-package-name: Give me a string and I'll tell you if it's a valid npm package name

• @bconnorwhite/bob: Bob builds and watches typescript projects.
• @types/validate-npm-package-name: TypeScript definitions for validate-npm-package-name

MIT

Related Packages

• package-name-conflict: Check if NPM package names conflict
• all-package-names: Get all NPM package names.
• npm-pd: A CLI dashboard for NPM publishers
• npms-io-client: Isomorphic typed client for npms.io