Operators

LiquidJS operators are very simple and different. There’re 2 types of operators supported:

• Comparison operators: ==, !=, >, <, >=, <=
• Logic operators: not, or, and, contains

Thus numerical operators are not supported and you cannot even plus two numbers like this {{a + b}}, instead we need a filter {{ a | plus: b}}. Actually + is a valid variable name in LiquidJS.

Logic Operators

not

Negates a condition. Returns true if the condition is false, and false if the condition is true.

Input

{% if not user.active %}
  User is inactive
{% endif %}

and

Returns true if both conditions are true.

Input

{% if user.age >= 18 and user.verified %}
  Access granted
{% endif %}

or

Returns true if at least one condition is true.

Input

{% if user.isAdmin or user.isModerator %}
  You have elevated privileges
{% endif %}

contains

Checks if a string contains a substring, or if an array contains an element.

Input

{% if product.title contains "Pack" %}
  This is a pack
{% endif %}

Precedence

1. Comparison operators, and contains. All comparison operators alongside contains have the same (highest) precedence.
2. not operator. It has slightly more precedence than or and and.
3. or and and operators. These logic operators have the same (lowest) precedence.

Associativity

Logic operators are evaluated from right to left, see shopify docs.