Template variables

Template rendering applies to a template’s subject, html, and text, and to any of those fields you pass directly on the send request.

Syntax

Variables come from the send request’s data object:

{ "data": { "user": { "name": "Sam" }, "items": ["A", "B"], "pro": true } }

Syntax	Meaning
{{user.name}}	Dotted-path lookup into data
{{#if pro}} … {{else}} … {{/if}}	Conditional block
{{#unless pro}} … {{/unless}}	Inverted conditional
{{#each items}} {{this}} ({{@index}}) {{/each}}	Iterate a list; {{this}} is the item, {{@index}} its position

Unresolved placeholders are left intact rather than erased, and substitution is raw; values are not HTML-escaped, so don’t interpolate untrusted input into HTML.

data vs tags

• data (object, nested values allowed) is the preferred variable source and enables the block syntax above.
• tags (flat string map) are metadata first; when a send has no data, they double as simple {{key}} variables.

When data is present, tags are not used for rendering at all.