Filters inside a frontmatter

[eshlox]

Is it possible to use filters inside a frontmatter?

The previous version has a Transform Content feature that I use to translate emails. Example:

---
title: <raw i18n>Title</raw>
---

I've migrated from transform to filters, but it does not work the same way. Was this change intentional? Can I somehow modify the frontmatter content?

I may try to write a custom posthtml plugin, but maybe there is an easier way.

[cossssmin]

PostHTML tags don't work inside Front Matter, but you can use a function instead:

// config.js
module.exports = {
  // ...
  uppercase: string => string.toUpperCase()
}

---
title: "{{{ page.uppercase('Some title') }}}"
---

Notice how the variable must be wrapped in double quotes "".

You can also nest the uppercase function in a locals object if you don't like to call if off the page object:

// config.js
module.exports = {
  // ...
  locals: {
    uppercase: string => string.toUpperCase(),
  },
}

---
- title: "{{{ page.uppercase('Some title') }}}"
+ title: "{{{ uppercase('Some title') }}}"
---