find-free-ports
Advanced tools
This is a very small package that allows developers to find free ports on the local system. Unlike most other "find-free-port" utilities, this library allows scanning for multiple free ports at once, making sure that there are no doubles in the result.
This library has been benchmarked and parallelises the port checks using a customisable number of workers for optimal performance.
🔍 Found an issue? Please let me know in the issue tracker and we'll get it fixed ASAP.
npm i find-free-ports
const findFreePorts = require('find-free-ports');
async function init() {
const [a, b, c, d] = await findFreePorts(4);
// now do something interesting with the new ports ...
}
We use TypeScript to check for human mistakes.
tsc --watch
You can run the tests with the following command:
npm test
⚠️ The tests may use a lot of resources so make sure your computer is up for the task. Also, due to race conditios with other applications that cannot be avoided, the tests may falsly fail or succeed in rare cases. Be sure to double-check any changes you make.
The MIT License
FAQs
Find multiple free ports on localhost
The npm package find-free-ports receives a total of 5,305 weekly downloads. As such, find-free-ports popularity was classified as popular.
We found that find-free-ports 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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