function promises.lookupService
Usage in Deno
import { promises } from "node:dns"; const { lookupService } = promises;
lookupService(address: string,port: number,): Promise<{ hostname: string; service: string; }>
Resolves the given address and port into a host name and service using
the operating system's underlying getnameinfo implementation.
If address is not a valid IP address, a TypeError will be thrown.
The port will be coerced to a number. If it is not a legal port, a TypeError will be thrown.
On error, the Promise is rejected with an Error object, where err.code is the error code.
const dnsPromises = require('node:dns').promises; dnsPromises.lookupService('127.0.0.1', 22).then((result) => { console.log(result.hostname, result.service); // Prints: localhost ssh });
Promise<{ hostname: string; service: string; }>