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freeport-async
Advanced tools
Finds an available port for your application to use. You can specify a range where to look for an available port. And can also find a range of available ports for you to use. You can also be used to test to see if a given port is available.
All functions are async and return Promises.
let freeportAsync = require("freeport-async");
let portICanUse = await freeportAsync();
let freeportAsync = require("freeport-async");
let portIn9000Range = await freeportAsync(9000);
let portAvailableForAnyOrLocalhost = await freeportAsync(9000, {
hostnames: [null, "localhost"]
});
let isPort5000Available = await freeportAsync.availableAsync(5000);
let listOf5ConsecutiveAvailablePorts = await freeportAsync.rangeAsync(5);
let freeRangeIn12000Range = await freeportAsync.rangeAsync(3, 12000);
Note that this code just finds available ports, but doesn't reserve them in any way. This means that if you have other code that might be looking for a port in the same range at the same time, you could run into issues.
Also, if you call freeportAsync
twice in a row, it will often return the same port number twice. If you want to find two (or more) ports you can use, you need to call freeportAsync.rangeAsync(<number-of-ports>, [startSearchFrom])
.
FAQs
Finds an available port for your application to use.
The npm package freeport-async receives a total of 1,113,820 weekly downloads. As such, freeport-async popularity was classified as popular.
We found that freeport-async demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 18 open source maintainers collaborating on the project.
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Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Product
Socket now supports Scala and Kotlin, bringing AI-powered threat detection to JVM projects with easy manifest generation and fast, accurate scans.
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