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first-open-port
Advanced tools
find the first open port on localhost within a range of specified ports
first-open-port
About | Installation | Usage | License
A tiny Node.js module to get the first available port on localhost
in a given range.
Handy for avoiding hard-coded port conflicts (EADDRINUSE
) if you frequently spin up more than one local server during development.
Returns a Promise.
Install and require as a standard Node module.
Install
$ npm install --save first-open-port
Require
var firstOpenPort = require('first-open-port')
firstOpenPort(start, max)
Returns a bluebird
Promise that resolves with the first open port or rejects with an error if no open ports are found in the given range.
var firstOpenPort = require('first-open-port')
firstOpenPort(3000, 3100)
.then(port => {
// start a server on that port
})
.catch(err => {
// do something when no ports are available
})
FAQs
find the first open port on localhost within a range of specified ports
The npm package first-open-port receives a total of 10 weekly downloads. As such, first-open-port popularity was classified as not popular.
We found that first-open-port demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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