Xast-util-feed NPM

xast-util-feed

xast utility to build (web) feeds (RSS, Atom).

What is this?

This package generates RSS or Atom feeds from data.

When should I use this?

This package helps you add feeds to your site. It focusses on a small set of widely used and supported parts of feeds. It has a few good options instead of overwhelming with hundreds of things to configure. If you do need more things, well: this utility gives you a syntax tree, which you can change.

It’s good to use this package to build several feeds and to only include recent posts (often 15-20 items are included in a channel). You should make a channel for all your posts; when relevant, separate channels per language as well; and potentially, channels per post type (such as separate ones for blog posts, notes, and images).

Just using either RSS or Atom is probably fine: no need to do both.

Install

This package is ESM only. In Node.js (version 16+), install with npm:

npm install xast-util-feed

In Deno with esm.sh:

import {atom, rss} from 'https://esm.sh/xast-util-feed@2'

In browsers with esm.sh:

<script type="module">
  import {atom, rss} from 'https://esm.sh/xast-util-feed@2?bundle'
</script>

Use

import {atom, rss} from 'xast-util-feed'
import {toXml} from 'xast-util-to-xml'

const channel = {
  title: 'NYT > Top Stories',
  url: 'https://www.nytimes.com',
  feedUrl: 'https://rss.nytimes.com/services/xml/rss/nyt/HomePage.xml',
  lang: 'en',
  author: 'The New York Times Company'
}

const data = [
  {
    title: 'Senate Balances Impeachment Trial With an Incoming President',
    url:
      'https://www.nytimes.com/2021/01/14/us/politics/impeachment-senate-trial-trump.html',
    descriptionHtml: '<p>Senate leaders etc etc etc.</p>',
    author: 'Nicholas Fandos and Catie Edmondson',
    published: 'Fri, 15 Jan 2021 01:18:49 +0000',
    tags: ['Senate', 'Murkowski, Lisa', 'Trump, Donald J']
  }
]

console.log(toXml(rss(channel, data)))
console.log(toXml(atom(channel, data)))

Yields (pretty printed):

<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom">
  <channel>
    <title>NYT > Top Stories</title>
    <description></description>
    <link>https://www.nytimes.com/</link>
    <lastBuildDate>Sun, 17 Jan 2021 09:00:54 GMT</lastBuildDate>
    <dc:date>2021-01-17T09:00:54.781Z</dc:date>
    <atom:link href="https://rss.nytimes.com/services/xml/rss/nyt/HomePage.xml" rel="self" type="application/rss+xml"></atom:link>
    <language>en</language>
    <dc:language>en</dc:language>
    <copyright>© 2021 The New York Times Company</copyright>
    <dc:rights>© 2021 The New York Times Company</dc:rights>
    <item>
      <title>Senate Balances Impeachment Trial With an Incoming President</title>
      <dc:creator>Nicholas Fandos and Catie Edmondson</dc:creator>
      <link>https://www.nytimes.com/2021/01/14/us/politics/impeachment-senate-trial-trump.html</link>
      <guid isPermaLink="false">https://www.nytimes.com/2021/01/14/us/politics/impeachment-senate-trial-trump.html</guid>
      <pubDate>Fri, 15 Jan 2021 01:18:49 GMT</pubDate>
      <dc:date>2021-01-15T01:18:49.000Z</dc:date>
      <category>Senate</category>
      <category>Murkowski, Lisa</category>
      <category>Trump, Donald J</category>
      <description>&#x3C;p>Senate leaders etc etc etc.&#x3C;/p></description>
    </item>
  </channel>
</rss>

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
  <title>NYT > Top Stories</title>
  <subtitle></subtitle>
  <link>https://www.nytimes.com/</link>
  <id>https://www.nytimes.com/</id>
  <updated>Sun, 17 Jan 2021 09:00:54 GMT</updated>
  <link href="https://rss.nytimes.com/services/xml/rss/nyt/HomePage.xml" rel="self" type="application/atom+xml"></link>
  <rights>© 2021 The New York Times Company</rights>
  <author>
    <name>The New York Times Company</name>
  </author>
  <category term="Senate"></category>
  <category term="Murkowski, Lisa"></category>
  <category term="Trump, Donald J"></category>
  <entry>
    <title>Senate Balances Impeachment Trial With an Incoming President</title>
    <author>
      <name>Nicholas Fandos and Catie Edmondson</name>
    </author>
    <link href="https://www.nytimes.com/2021/01/14/us/politics/impeachment-senate-trial-trump.html"></link>
    <id>https://www.nytimes.com/2021/01/14/us/politics/impeachment-senate-trial-trump.html</id>
    <published>2021-01-15T01:18:49.000Z</published>
    <content type="html">&#x3C;p>Senate leaders etc etc etc.&#x3C;/p></content>
  </entry>
</feed>

API

This package exports the identifiers atom and rss. There is no default export.

`atom(channel, data)`

Build an Atom feed.

Parameters

channel (Channel) — data on the feed (the group of items)
data (Array<Entry>, optional) — list of entries

Returns

Atom feed (Root).

`rss(channel, data)`

Build an RSS feed.

Parameters

channel (Channel) — data on the feed (the group of items)
data (Array<Entry>, optional) — list of entries

Returns

RSS feed (Root).

`Author`

Author object (TypeScript type).

Fields

`name`

Name (string, required, example: 'Acme, Inc.' or 'Jane Doe').

`email`

Email address (string, optional, ,example: john@example.org)

`url`

URL to author (string, optional, example: 'https://example.org/john').

url is used in atom, not in rss.

`Channel`

Data on the feed (the group of items) (TypeScript type).

Fields

`title`

Title of the channel (string, required, example: Zimbabwe | The Guardian).

`url`

Full URL to the site (string, required, example: 'https://www.theguardian.com/world/zimbabwe').

`feedUrl`

Full URL to this channel (string?, example: 'https://www.adweek.com/feed/').

Make sure to pass different ones to rss and atom when you build both!

You should define this.

`description`

Short description of the channel (string?, example: Album Reviews).

You should define this.

`lang`

BCP 47 language tag representing the language of the whole channel (string?, example: 'fr-BE').

You should define this.

`author`

Optional author of the whole channel (string or Author).

Either string, in which case it’s as passing {name: string}. Or an author object.

`tags`

Categories of the channel (Array<string>?, example: ['JavaScript', 'React']).

`Enclosure`

Media (TypeScript type).

Fields

`url`

Full URL to the resource (string, required, example: 'http://dallas.example.com/joebob_050689.mp3').

`size`

Resource size in bytes (number, required, example: 24986239).

`type`

Mime type of the resource (string, required, example: 'audio/mpeg').

`Entry`

Data on a single item (TypeScript type).

Fields

`title`

Title of the item (string?, example: 'Playboi Carti: Whole Lotta Red').

Either title, description, or descriptionHtml must be set.

`description`

Either the whole post or an excerpt of it (string?, example: 'Lorem').

Should be plain text. descriptionHtml is preferred over plain text description.

Either title, description, or descriptionHtml must be set.

`descriptionHtml`

Either the whole post or an excerpt of it (string?, example: '<p>Lorem</p>').

Should be serialized HTML. descriptionHtml is preferred over plain text description.

Either title, description, or descriptionHtml must be set.

`author`

Entry version of channel.author.

You should define this.

For atom, it is required to either set channel.author or set author on all entries.

`url`

Full URL of this entry on the site (string?, example: 'https://pitchfork.com/reviews/albums/roberta-flack-first-take').

`published`

When the entry was first published (Date or value for new Date(x), optional).

`modified`

When the entry was last modified (Date or value for new Date(x), optional).

`tags`

Categories of the entry (Array<string>?, example: ['laravel', 'debugging']).

`enclosure`

Attached media (Enclosure?).

Types

This package is fully typed with TypeScript. It exports the additional types Author, Channel, Enclosure, and Entry.

Compatibility

Projects maintained by the unified collective are compatible with maintained versions of Node.js.

When we cut a new major release, we drop support for unmaintained versions of Node. This means we try to keep the current release line, xast-util-feed@^2, compatible with Node.js 16.

Security

XML can be a dangerous language: don’t trust user-provided data.

xast-util-to-xml — serialize xast to XML
xast-util-sitemap — build a sitemap
xastscript — create xast trees

Contribute

See contributing.md in syntax-tree/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.

License

unist xast xast-util util utility xml feed rss atom syndicate

@types/xast bcp-47-normalize unist-builder xastscript

@infinitebrahmanuniverse/nolb-xa @everything-registry/sub-chunk-3176 markdown-rambler @stefanprobst/next-feed

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xast-util-feed

Contents

What is this?

When should I use this?

Install

Use

API

atom(channel, data)

Parameters

Returns

rss(channel, data)

Parameters

Returns

Author

Fields

name

email

url

Channel

Fields

title

url

feedUrl

description

lang

author

tags

Enclosure

Fields

url

size

type

Entry

Fields

title

description

descriptionHtml

author

url

published

modified

tags

enclosure

Types

Compatibility

Security

Related

Contribute

License

`atom(channel, data)`

`rss(channel, data)`

`Author`

`name`

`email`

`url`

`Channel`

`title`

`url`

`feedUrl`

`description`

`lang`

`author`

`tags`

`Enclosure`

`url`

`size`

`type`

`Entry`

`title`

`description`

`descriptionHtml`

`author`

`url`

`published`

`modified`

`tags`

`enclosure`