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Rslint

    prefer-promises/dns

    Unreleased

    Configuration

    rslint.config.ts
    import { defineConfig, nodePlugin } from '@rslint/core';

export default defineConfig([
  nodePlugin.configs.recommended,
  {
    rules: {
      'node/prefer-promises/dns': 'error',
    },
  },
]);

    Prefer the promise API of Node.js's dns module.

    Rule Details

    This rule reports calls to the callback DNS API and construction of dns.Resolver. It follows CommonJS imports, ES module imports, process.getBuiltinModule, and local aliases, including the node:dns module name.

    Examples of incorrect code for this rule:

    const dns = require('node:dns');
dns.lookup(hostname, (error, address, family) => {});
new dns.Resolver();

    Examples of correct code for this rule:

    const { promises: dns } = require('node:dns');
const { address, family } = await dns.lookup(hostname);
new dns.Resolver();
    import dns from 'node:dns/promises';
const addresses = await dns.resolve4(hostname);

    The rule also reports getServers() and setServers() on the callback module, matching upstream behavior. Reading a method without calling it is allowed.

    Options

    This rule has no options and does not provide automatic fixes or suggestions.

    Original Documentation