eleventy: bug: trying to create a file with any extension other than html

Describe the bug I’m trying to output different files with extension .css or .xml using the syntax:

---
permalink: /assets/css/styles.css
---

---
permalink: /feed.xml
---

Expected behavior I’m expecting to find the created files but I get these errors:

> The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined

`TypeError` was thrown:
    TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined

Environment:

OS and Version: Windows 10 and Linux (Ubuntu 20.04)
Eleventy Version: 0.11.0

Do I need to set something in the .eleventy.js? How can I debug this “undefined” data?

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 21 (2 by maintainers)

Most upvoted comments

I was using html-minifier and it was returning undefined if the file didn’t end with .html, which the .xml file wasn’t. In my code I updated it from:

eleventyConfig.addTransform('htmlmin', (content, outputPath) => {
    if (outputPath.endsWith('.html')) {
      return htmlmin.minify(content, {
        useShortDoctype: true,
        removeComments: true,
        collapseWhitespace: true,
        keepClosingSlash: true
      })
      return content
    }
  })

To this:

eleventyConfig.addTransform('htmlmin', (content, outputPath) => {
    if (outputPath.endsWith('.html')) {
      return htmlmin.minify(content, {
        useShortDoctype: true,
        removeComments: true,
        collapseWhitespace: true,
        keepClosingSlash: true
      })
    } else {
      return content
    }
  })

It now works

phazonoverload on Aug 30, 2020

thanks @phazonoverload, I was having the same problem with a custom transform and your code helped me see the problem (I also wasn’t returning the original content when my initial condition didn’t match).

johnpuddephatt on Oct 14, 2020

Was there any update to this issue? I’m facing what I think is a similar problem.

When I try and create a .xml or .json file from my Liquid template by specifying extension in the permalink property I get a file where the content is only:

undefined

phazonoverload on Aug 30, 2020