# Functions vs Filters Quick Reference

URL: /docs/theming/templating/functions-quick-reference/
Section: templating
Tags: reference, templates, filters, functions, quick-reference

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Functions vs Filters Quick Reference Filters: Transform Values Syntax: {{ value | filter }} or {{ value |> filter }} Use when: You have a value to transform Examples: {{ text | upper }} {{ pages |> where('draft', false) |> sort_by('date') }} {{ page.content | markdown | safe }} Functions: Standalone Operations Syntax: {{ function() }} or {{ function(arg) }} Use when: Performing an operation or lookup Examples: {{ get_page('docs/about') }} {{ get_data('data/authors.json') }} {{ ref('docs/getting-started') }} {{ page_exists('path') }} Decision Tree Do I have a value to transform? ├─ Yes → Use filter (| or |>) │ └─ Example: {{ text | upper }} │ └─ No → Use function (direct call) └─ Example: {{ get_page('path') }} Common Patterns Filter a collection: {{ site.pages |> where('type', 'blog') |> sort_by('date') }} Get data, then filter: {% let authors = get_data('data/authors.json') %} {% let active = authors |> where('active', true) %} Function result in filter chain: {% let section = get_section('blog') %} {{ section.pages |> limit(5) }} Quick Examples Task Type Code Uppercase text Filter {{ text \| upper }} Filter pages Filter {{ pages \|> where('draft', false) }} Get a page Function {{ get_page('path') }} Load data Function {{ get_data('file.json') }} Generate link Function {{ ref('docs/page') }} Chain filters Filter {{ data \|> filter1 \|> filter2 }} Info Seealso Complete Reference — All available functions and filters Functions vs Filters Explanation — Detailed explanation

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Metadata:
- Author: lbliii
- Word Count: 234
- Reading Time: 1 minutes