Introduction
Liquid is an open-source, Ruby-based template language created by Shopify. It is the backbone of Shopify themes and is used to load dynamic content on storefronts.
Liquid uses a combination of tags, objects, and filters to load dynamic content. They are used inside Liquid template files, which are a group of files that make up a theme. For more information on the available templates, please see Theme Development.
Tags
Tags make up the programming logic that tells templates what to do. Tags are wrapped in:
Control Flow Tags
if
Executes a block of code only if a certain condition is met. 01
{% if product.title == 'Awesome Shoes' %}
These shoes are awesome!
{% endif %}
{% if customer.name == 'kevin' %}
Hey Kevin!
{% elsif customer.name == 'anonymous' %}
Hey Anonymous!
{% else %}
Hi Stranger!
{% endif %}
case/when
Creates a switch statement to compare a variable with different values. case initializes the switch statement, and when compares its values.
{% assign handle = 'cake' %}
{% case handle %}
{% when 'cake' %}
This is a cake
{% when 'cookie' %}
This is a cookie
{% else %}
This is not a cake nor a cookie
{% endcase %}
unless
Similar to if, but executes a block of code only if a certain condition is not met.
{% unless product.title == 'Awesome Shoes' %}
These shoes are not awesome.
{% endunless %}
Iteration Tags
Theme Tags
Variable Tags
Objects
Objects contain attributes that are used to display dynamic content on the page.
Filters
Filters are used to modify the output of strings, numbers, variables, and objects.
Refer
- https://docs.shopify.com/themes/liquid-documentation/basics