Data Expressions

Press uses {{ }} syntax to insert dynamic values into documents.

Syntax

Expression	Description	Example
{{ data.field }}	Top-level data field	{{ data.title }}
{{ data.nested.field }}	Nested object field	{{ data.client.name }}
{{ data.items[0] }}	Array element by index	{{ data.rows[0].name }}
{{ item.field }}	Current repeat item	{{ person.email }}
{{ attrs.name }}	Component attribute	{{ attrs.title }}
{{ assets.data.field }}	Asset data	{{ assets.data.defaults.currency }}
{{ section.data.field }}	Flow group data	{{ section.data.chapter-title }}

Ternary Expressions

{{ condition ? valueIfTrue : valueIfFalse }}

Pattern	Example
Default value	{{ data.name ? data.name : 'Unknown' }}
Conditional text	{{ data.urgent ? 'URGENT' : 'Standard' }}
Conditional sizing	{{ data.sidebar ? '60%' : '100%' }}
Conditional style	{{ data.active ? 'bold' : 'normal' }}

Where Expressions Work

Context	Example
Text content	<p>{{ data.message }}</p>
Attribute values	<frame width="{{ data.width }}">
Image sources	<img src="{{ data.photo }}" />
Style values	<span font-color="{{ data.highlight }}">
Component attrs	<my-comp title="{{ data.title }}" />
Page names	<page name="{{ section.data.type }}" />

Special Variables

Variable	Available In	Description
data.*	Everywhere	Top-level document data
assets.data.*	Everywhere	Asset-defined constant data
item	Inside <repeat>	Current iteration item (default name)
attrs.*	Inside components	Component attribute values
section.data.*	Inside group repeats	Current flow group's data
visualization.groups	Inside visualisations	Chart data groups

Outline Entry Properties

Available when iterating over outline collections with <repeat outline="...">:

Property	Description
entry.page-number	Page where the element appears
entry.text-content	Text content of the element
entry.index	Position in the collection (1-based)
entry.level	Hierarchy level (if set)