Node.js implementation of port detector
- ⭐⭐⭐eggjs/egg
- ⭐⭐⭐alibaba/ice
- ⭐⭐⭐alibaba/uirecorder
- ⭐⭐⭐facebook/create-react-app
- ⭐⭐⭐facebook/flipper
- ⭐⭐⭐umijs/umi
- ⭐⭐⭐gatsbyjs/gatsby
- ⭐⭐⭐electron-react-boilerplate/electron-react-boilerplate
- ⭐⭐⭐zeit/micro
- ⭐⭐⭐rails/webpacker
- ⭐⭐⭐storybookjs/storybook
npm i detect-port
CommonJS
const { detect } = require('detect-port'); detect(port) .then(realPort => { if (port == realPort) { console.log(`port: ${port} was not occupied`); } else { console.log(`port: ${port} was occupied, try port: ${realPort}`); } }) .catch(err => { console.log(err); });
ESM and TypeScript
import { detect } from 'detect-port'; detect(port) .then(realPort => { if (port == realPort) { console.log(`port: ${port} was not occupied`); } else { console.log(`port: ${port} was occupied, try port: ${realPort}`); } }) .catch(err => { console.log(err); });
npm i detect-port -g
# get an available port randomly $ detect # detect pointed port $ detect 80 # output verbose log $ detect --verbose # more help $ detect --help
Most likely network error, check that your /etc/hosts and make sure the content below:
127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost
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