Handle dev server ports like a boss 😎

Table of Contents

• 💡 Inspiration
• Prerequisites
• API Reference
  • findPort
• Examples
• Contributors
• License

Inspiration

Sometimes we need to show our users a bit more context when the development ports conflict. Most of the already available packages lacks the support to customize the prompts. This package tries to solve this issue along with a lot more helpers that would supplement development pipelines when working with dev ports.

Prerequisites

• Node.js version >=12.0.0 is required. (Inquirer.js version used in the isn't compatible with lower node versions.)

API Reference

findPort

findPort(
  port: number,
  hostname?: string,
  shouldFallback?: boolean | undefined,
  reporter?: {
    extensions: Partial<IReporterExtensions>;
    overrides: Partial<IReporter>;
  }
)

Returns

A Promise of type number.

Description

Argument	Type	Default Value	Required	Description
port	number	-	Yes	Prefered port to fire up the app in.
hostname	string	-	No	Host name of the application. Ex: localhost or 127.0.0
shouldFallback	boolean	true	No	Should the function return a an available port. You can set this to false if you wish to show just a message to the user in case of a port conflict.
reporter	{ extensions: Partial<IReporterExtensions>; overrides: Partial<IReporter>;}	-	No	Customize the messages shown to the user incase of a port conflict.

Usage

Basic Usage

PORT resolves to 3000 if the port is available. If the port is unavailable, users will get the chance to fallback to the nearest available port.

const { findPort } = require("dev-server-ports");

const PORT = await findPort(3000);

Output

Resolve port with no fallback

If the port is not available, only a prompt will be shown to the user. You can customize this prompt to match the requirements.

const { findPort } = require("dev-server-ports");

const PORT = await findPort(3000, "localhost", false, {
  extensions: {
    BEFORE_getProcessTerminationMessage: () => {
      return `Read through the README.md (https://github.com/brionmario/dev-server-ports/blob/main/README.md)
file for more information.`;
    }
  }
});

Output

Examples

Webpack Dev Server v4 example

Usage of the library with Webpack Dev Server v4 which is the latest version at the time of writting, can be found below.

💡 Version 4.x doesn't allow to pass a function that returns a promise straight in to the port field of the devServer configuration.

• Source Code.

Contributors ✨

Thanks goes to these wonderful people (emoji key):

Brion Mario 💻

This project follows the all-contributors specification. Contributions of any kind welcome!

License

This project is licensed under the MIT License. See the LICENSE file for details.