From 0c9ea4fe8b693ebf02940bd7b58297e96cdb614b Mon Sep 17 00:00:00 2001 From: Sam Roberts Date: Mon, 13 Feb 2017 12:04:00 -0800 Subject: [PATCH] doc: dns examples implied string args were arrays Fix: https://github.com/nodejs/node/pull/11334 PR-URL: https://github.com/nodejs/node/pull/11350 Reviewed-By: Gibson Fahnestock Reviewed-By: James M Snell --- doc/api/dns.md | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/doc/api/dns.md b/doc/api/dns.md index ec7469f3152bf4..e7cbfb268c0905 100644 --- a/doc/api/dns.md +++ b/doc/api/dns.md @@ -15,9 +15,10 @@ For example, looking up `nodejs.org`. ```js const dns = require('dns'); -dns.lookup('nodejs.org', (err, addresses, family) => { - console.log('addresses:', addresses); +dns.lookup('nodejs.org', (err, address, family) => { + console.log('address: %j family: IPv%s', address, family); }); +// address: "192.0.43.8" family: IPv4 ``` 2) Functions that connect to an actual DNS server to perform name resolution, @@ -115,6 +116,25 @@ important consequences on the behavior of any Node.js program. Please take some time to consult the [Implementation considerations section][] before using `dns.lookup()`. +Example usage: + +```js +const dns = require('dns'); +const options = { + family: 6, + hints: dns.ADDRCONFIG | dns.V4MAPPED, +}; +dns.lookup('example.com', options, (err, address, family) => + console.log('address: %j family: IPv%s', address, family)); +// address: "2606:2800:220:1:248:1893:25c8:1946" family: IPv6 + +// When options.all is true, the result will be an Array. +options.all = true; +dns.lookup('example.com', options, (err, addresses) => + console.log('addresses: %j', addresses)); +// addresses: [{"address":"2606:2800:220:1:248:1893:25c8:1946","family":6}] +``` + ### Supported getaddrinfo flags The following flags can be passed as hints to [`dns.lookup()`][].