Can’t find properties of global data via eleventyComputed

[paulrobertlloyd]

I’m looking at the new computed data feature, and seems like it can help me greatly simplify my templates (and perhaps help improve build time as a result). However, I’ve come across an issue.

---

Given the following *.11tydata.js file in a directory:

module.exports = {
  layout: 'article',
  permalink: '{{ page.date | date: "%Y/%m" }}/{{ page.fileSlug }}.html',
  eleventyComputed: {
    image: data => {
      console.log(data.app); // data.app is populated by the global data file, app.js
    }
  }
};

Logging data.app, I get the following output (simplified) in the console for each page in the directory:

{
  title: 'Paul Robert Lloyd',
  short_title: 'PRL',
  description: 'The personal website of Paul Robert Lloyd'
}

However, if I update my *.11tydata.js file to log data.app.title, I get the following error:

Problem writing Eleventy templates: (more in DEBUG output)
> Cannot read property 'title' of undefined

This is weird, as that was previously shown as a property of app. Have I missed something?

[zachleat]

Related to/fixed with #1061.