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 🙏

© 2026 – Pkg Stats / Ryan Hefner

unplugin-singleton

v0.1.3

Published

Unplugin: 单例 dev/preview,就绪后写入锁文件供 E2E、脚本读取

Readme

unplugin-singleton

NPM version

Unplugin 约定:单例 dev/preview,就绪后写入锁文件(pidportbaseUrl),供 E2E、脚本读取。 dev 与 preview 各一把锁,路径固定为项目 root 下的 .dev/

安装

pnpm add -D unplugin-singleton
# or
npm i -D unplugin-singleton

使用

Vite(推荐用子路径 /vite):

// vite.config.js / vite.config.ts
import Singleton from 'unplugin-singleton/vite';

export default defineConfig({
  plugins: [Singleton()],
});

也可 import p from 'unplugin-singleton'; plugins: [p.vite()]

锁文件

  • dev:dev 服务器就绪后写入 <root>/.dev/dev.lock.json,关闭时删除。
  • preview:preview 就绪后写入 <root>/.dev/preview.lock.json,关闭时删除。

格式(两者相同):

{
  "pid": 12345,
  "port": 5173,
  "baseUrl": "http://localhost:5173"
}
  • pid:当前进程 PID,用于单例检测(锁存在且 pid 存活则不再起第二个)。
  • port:实际监听端口。
  • baseUrl:可直接用于 E2E 或脚本的根 URL。

Monorepo 下每个 app 用自己的 root,锁自然落在各自 root 的 .dev/ 下,无需额外配置。

首次运行时会确保 <root>/.dev/.gitignore 为一行 *(忽略 .dev 下全部文件),不会修改项目根目录的 .gitignore

Nuxt

子路径 unplugin-singleton/nuxt,只加 modules 即可(不注册 Vite 插件,逻辑在模块内完成):

// nuxt.config.ts
export default defineNuxtConfig({
  modules: ['unplugin-singleton/nuxt'],
  devServer: { port: 3200 }, // 可选,默认 3000
});

模块在 listen 时写入与 Vite 相同的 .dev/dev.lock.json(pid、port、baseUrl),关闭时删除。输出格式与 Vite 下一致,无 Nuxt 专用文件。

消费者示例(Shell)

读取 dev baseUrl:

BASE_URL=$(node -e "console.log(JSON.parse(require('fs').readFileSync('.dev/dev.lock.json','utf8')).baseUrl)")

读取 preview baseUrl:

BASE_URL=$(node -e "console.log(JSON.parse(require('fs').readFileSync('.dev/preview.lock.json','utf8')).baseUrl)")

开发

  • 监听构建:vp run dev
  • 测试:vp test
  • 构建:vp run build
  • Vite playground:vp run play:vite
  • Nuxt playground:vp run play:nuxt

License

MIT