Roosevelt

First make sure Node.js is installed on your system.

Then, to install crossplatform-killport to your system:

npm i -g crossplatform-killport

Kill whatever process is using port 8080:

killport 8080

Windows users may need to run Set-ExecutionPolicy Unrestricted on their terminal to permit the script to run. See docs from Microsoft for more information.

Use via npx (this will allow you to use it without installing it to your system by downloading it from npm temporarily):

npx crossplatform-killport 8080

Use from within a Node.js project's root directory:

node_modules/.bin/killport 8080

Use from within Node.js code:

const { spawnSync, } = require('child_process')
spawnSync('node_modules/.bin/killport', ['8080', '--silent'], { env: process.env, shell: false, stdio: ['ignore', 'pipe', 'pipe'] })