Functions

TemplateTo provides special functions that extend Liquid's capabilities for document generation.

Quick Reference

Function	Purpose	Example
`repeat()`	Iterate with JSONPath	`{{ repeat("$.items[*]", "...", "...") }}`
`contentBlock()`	Embed reusable blocks	`{{ contentBlock("cb_123", "comp1", "All") }}`
`qrCode()`	Generate QR codes	`{{ qrCode(url) }}`
`barcode()`	Generate barcodes	`{{ barcode(code, "CODE128") }}`
`isArray()`	Check if value is array	`{% if isArray(items) %}`

Function Syntax

Functions use Liquid's output syntax with parentheses:

{{ functionName(argument1, argument2) }}

Functions can also be used in control flow:

{% if isArray(data) %}
    {% for item in data %}...{% endfor %}
{% endif %}

When to Use Functions

repeat() vs for loops

Use standard {% for %} loops when: - Iterating over a simple array - You need full Liquid control flow

Use repeat() when: - You need JSONPath filtering - The array is deeply nested - You want to filter items with JSONPath expressions

contentBlock() for reusability

Use contentBlock() when: - Multiple templates share the same component - You want centralized styling/content updates - Building modular document systems

qrCode() and barcode()

Use these when: - Generating trackable documents - Creating shipping labels - Adding scannable links or references

Functions in Detail

repeat()

JSONPath-based iteration for advanced data filtering

Learn more
contentBlock()

Embed reusable content blocks with data scoping

Learn more
qrCode() & barcode()

Generate QR codes and barcodes inline

Learn more
Utilities

Helper functions like isArray()

Learn more

Combining Functions

Functions can be combined with standard Liquid:

{% if showQRCode %}
    {{ qrCode(trackingUrl, "#000", "#fff", 10, 150, 150) }}
{% endif %}

{% if isArray(order.lines) %}
    {{ repeat("$.order.lines[*]", "<tr><td>{{name}}</td></tr>", "<table>_</table>") }}
{% else %}
    <p>Single item: {{ order.lines.name }}</p>
{% endif %}