npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2025 – Pkg Stats / Ryan Hefner

@jsenv/core

v40.6.0

Published

Tool to develop, test and build js projects

Downloads

6,906

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

jsenv-adminjsenv-admindmaildmail

Keywords

Readme

@jsenv/core

npm package

Overview

Jsenv is a suite of tools for JavaScript projects that prioritizes standards and simplicity, making it ideal for both beginners and those who need straightforward tools.

Installation

npm install --save-dev @jsenv/core

Compatibility: Tested on Mac, Windows, and Linux with Node.js 20. Other environments are not officially tested.

Documentation

For comprehensive documentation, see the full user documentation.

Basic Usage

Start a development server:

import { startDevServer } from "@jsenv/core";

await startDevServer({
  sourceDirectoryUrl: import.meta.resolve("./"),
});

Core Features

@jsenv/core provides four main tools:

  1. Dev Server: Serves source files with live reloading to facilitate development
  2. Build: Optimizes source files into a specified directory for production
  3. Build Server: Serves the built files, allowing for testing and verifying the production build
  4. Test Runner: Runs test files concurrently to ensure code reliability

Key Advantages

  • Standards-first approach: Built on web standards rather than custom abstractions
  • Robust versioning: Avoids cascading hash changes during builds
  • Broad browser compatibility: Works with modern and older browsers
  • Isolated testing: Prevents cross-test contamination
  • Simple API: Designed for clarity and ease of use

Quick Start

The easiest way to try jsenv is with the CLI:

npx @jsenv/cli

The CLI provides templates for web applications, React projects, and Node.js packages to get you started quickly.

Read more in @jsenv/cli.