Is there a way to configure Prettier so that it doesn't minify inline CSS in .mjml templates? - prettier

Question

I'm using .mjml templates and VSCode. I had to install an extension for the highlighting to work correctly but I noticed by Prettier seems to transform inline CSS (which is pretty common in emails) from this:
p,
h1 {
color: #ffffff;
}
h1,
.text-h1 h1 {
font-size: 32px;
line-height: 1.1;
margin: 0 0 16px 0;
font-weight: 700;
}
to this:
p, h1 { color: #ffffff; } h1, .text-h1 h1 { font-size: 32px; line-height: 1.1; margin: 0 0 16px 0; font-weight: 700; }
The only way I was able to prevent this is by adding a <!-- prettier-ignore --> before the <mj-style> tag but I was wondering if there isn't a better way (configuration?) to get the same result without the extra markup.
See:
https://github.com/mjmlio/mjml/issues/2557
Is there a way to tell Prettier that the following "block" has a specific markup type?

Answer 1

Based on my research and also the lack of answers, it looks like the overall MJML tooling ecosystem is not in the best of states. I think for now the best option is to use the workaround I provided. Here is a detailed breakdown of the options available.
Style element <mj-style>: (most likely the best option)
<!-- prettier-ignore -->
<mj-style css-inline="inline" />
.content {
color: green !important;
}
</mj-style>
Pros:
Works in the online visual editor by copy/pasting the markup.
Cons:
No Prettier formatting (ref).
An external CSS file:
<mj-include path="./default.css" type="css" css-inline="inline" />
Pros:
You can import a CSS file that will get normal Prettier treatment.
Standard pattern where CSS lives outside the document.
Cons:
It also won't work with the online MJML editor tool without merging back your CSS file. This is very annoying and makes it hard to maintain.
<mj-include> can report miss flagged error depending on our your project is setup.
It does not work with the "official" VSCode plugin (you have to use this one).
MJML inline styles:
<mj-text color="#fff" padding="0" font-weight="400" font-size="16px" line-height="1.65" />
Pros:
You don't need CSS.
Cons:
You possibly will repeat a lot of the same style and maintenance can become problematic.
Style element <mj-class>:
<mj-class name="blue" color="blue" />
Pros:
Benefits from the re-usability of CSS without having to use CSS, avoiding Prettier issues.
Cons:
Not as flexible as CSS in terms of selectors which can lead to repetition and maintenance issues.