Expressions

Handlebars-like, curly brace expression syntax is supported, allowing you to access variables from your Environment config or from a Template's Front Matter:

src/templates/example.html
---
title: Example
---
<x-main>
The title is: {{ page.title }}
You ran the `maizzle build {{ page.env }}` command.
</x-main>

Running maizzle build production would render this HTML:

The title is: Example
You ran the `maizzle build production` command.

You may use basic JavaScript expressions within curly braces:

src/templates/example.html
<x-main>
doctype is {{ page.doctype || 'not set' }}
this email {{ page.env === 'production' ? "is" : "isn't" }} production ready!
</x-main>

Running maizzle build, we would get:

doctype is not set
this email isn't production ready!

Unescaping

By default, special characters are escaped when using two curly braces:

src/templates/example.html
---
markup: '<strong>Bold</strong>'
---
<x-main>
{{ page.markup }}
<!-- Result: &lt;strong&gt;Bold&lt;strong&gt; -->
</x-main>

If you need to render values exactly as they are, use triple curly braces:

src/templates/example.html
---
markup: '<strong>Bold</strong>'
---
<x-main>
{{{ page.markup }}}
<!-- Result: <strong>Bold</strong> -->
</x-main>

Ignoring

Other templating engines and many ESPs also use the {{ }} syntax.

If you want to prevent expression compilation and actually render the curly braces so you can evaluate them at a later stage, you have several options:

Ignore inline

The Blade-inspired @{{ }} syntax is useful for one-offs, where you need to ignore a single expression. The compiled email will render {{ }} without the @.

src/templates/example.html
<x-main>
@{{ page.markup }}
<!-- Result: {{ page.markup }} -->
</x-main>

Ignore in Front Matter

You may also use @{{ }} to prevent expressions in Front Matter from being evaluated.

src/templates/example.html
---
title: "Weekly newsletter no. @{{ edition_count }}"
---
<x-main>
{{ page.title }}
</x-main>

Result:

build_production/example.html
Weekly newsletter no. {{ edition_count }}

Ignore with <raw>

This is useful if you want to ignore multiple expressions in one go:

src/templates/example.html
<raw>
<p>The quick brown {{ animals[0] }} jumps over the lazy {{ animals[1] }}.</p>
</raw>

<raw> will be removed in the final output, but the curly braces will be left untouched:

build_production/example.html
<p>The quick brown {{ animals[0] }} jumps over the lazy {{ animals[1] }}.</p>

Change delimiters

You can change the delimiters to something else, like [[ ]]:

config.js
module.exports = {
build: {
posthtml: {
expressions: {
delimiters: ['[[', ']]'],
unescapeDelimiters: ['[[[', ']]]']
}
}
}
}

Then you can safely use {{ }} and its contents will not be evaluated:

src/templates/example.html
<x-main>
<!-- This will be evaluated -->
[[ page.title ]]
<!-- But this won't be -->
Hi, {{ user.name }}.
</x-main>
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