XML

Parcel supports transforming RSS and Atom feeds defined in XML files using the @parcel/transformer-xml plugin. When a .xml, .rss, or .atom file is detected, it will be installed into your project automatically.

Dependencies

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Parcel transforms URL references within RSS and Atom feeds to match the final name and public URL, including content hashes where appropriate.

In RSS this includes:

In Atom this includes:

Embedded HTML

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Embedded HTML and XHTML content inside RSS and Atom feeds is also transformed as described in HTML. All URL references within embedded HTML will also be transformed, and the referenced files will be processed with the relevant Parcel pipelines.

HTML references

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RSS and Atom feeds can be referenced from an HTML file using the <link> element. Use the application/rss+xml or application/atom+xml mime type as appropriate. Parcel will ensure that XML files referenced this way do not receive a content hash and have a consistent URL over time.

<link
  href="feed.xml"
  rel="alternate"
  type="application/rss+xml"
  title="Blog RSS feed" />

Example

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This example shows an Atom feed containing a single entry. The URL references in the two <link> elements will be rewritten to include the public URL, and the image referenced in the content of the post will be processed and content hashed.

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <title>Example Feed</title>
  <subtitle>A subtitle.</subtitle>
  <link href="/" />
  <id>urn:uuid:60a76c80-d399-11d9-b91C-0003939e0af6</id>
  <updated>2021-12-13T18:30:02Z</updated>
  <entry>
    <title>Awesome post</title>
    <link href="post.html" />
    <id>urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a</id>
    <updated>2021-12-13T18:30:02Z</updated>
    <summary>Some text.</summary>
    <content type="xhtml">
      <div xmlns="http://www.w3.org/1999/xhtml">
        <p>This is the entry content.</p>
        <img src="image.png" />
      </div>
    </content>
    <author>
      <name>John Doe</name>
      <email>johndoe@example.com</email>
    </author>
  </entry>
</feed>