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Layers supports all standard JSONLogic operators. For complete documentation of standard operators, see jsonlogic.com/operations.html.

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Accessing data

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var

Retrieves a value from the data object. This is the most fundamental operator for accessing product attributes. 
{
  "var": "_attribute:title"
}
With default value if the field doesn’t exist: 
{
  "var": ["_attribute:published_at", null]
}
Access the current context (useful in map operations): 
{
  "var": ""
}

​
Logic and boolean operations

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if

Conditional logic with if-then-else structure. 
{
  "if": [
    { ">" : [{ "var": "_attribute:price" }, 100] },
    "expensive",
    "affordable"
  ]
}
Multiple conditions (if-elseif-else): 
{
  "if": [
    { "<" : [{ "var": "_attribute:price" }, 50] }, "cheap",
    { "<" : [{ "var": "_attribute:price" }, 100] }, "moderate",
    "expensive"
  ]
}

​
and

Logical AND operation. Returns true if all conditions are true. 
{
  "and": [
    { ">" : [{ "var": "_attribute:price" }, 50] },
    { "<" : [{ "var": "_attribute:price" }, 200] }
  ]
}

​
or

Logical OR operation. Returns true if any condition is true. 
{
  "or": [
    { "var": ["_attribute:published_at", null] },
    { "var": ["_attribute:created_at", null] }
  ]
}

​
! (not)

Logical NOT operation. Negates a boolean value. 
{
  "!": { "var": "_attribute:is_available" }
}

​
!! (double not)

Converts a value to boolean. Returns true if the value exists and is truthy. 
{
  "!!": { "var": "_raw:raw.featured_media" }
}

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Comparison operations

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== (equals)

Loose equality comparison. 
{
  "==": [
    { "var": "_attribute:status" },
    "active"
  ]
}

​
=== (strict equals)

Strict equality comparison (type and value must match). 
{
  "===": [
    { "var": "_attribute:variant_count" },
    1
  ]
}

​
!= (not equals)

Loose inequality comparison. 
{
  "!=": [
    { "var": "_attribute:vendor" },
    ""
  ]
}

​
!== (strict not equals)

Strict inequality comparison. 
{
  "!==": [
    { "var": "_attribute:price_range.from" },
    { "var": "_attribute:price_range.to" }
  ]
}

​
> (greater than)

{
  ">": [
    { "var": "_attribute:price" },
    100
  ]
}

​
>= (greater than or equal)

{
  ">=": [
    { "var": "_attribute:inventory_quantity" },
    10
  ]
}

​
< (less than)

{
  "<": [
    { "var": "_attribute:price" },
    50
  ]
}
Between comparison (compound): 
{
  "<": [50, { "var": "_attribute:price" }, 100]
}

​
<= (less than or equal)

{
  "<=": [
    { "var": "_attribute:discount_percentage" },
    25
  ]
}

​
Arithmetic operations

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+ (addition)

{
  "+": [
    { "var": "_attribute:base_price" },
    { "var": "_attribute:tax_amount" }
  ]
}

​
- (subtraction)

{
  "-": [
    { "var": "_attribute:price" },
    { "var": "_attribute:discount" }
  ]
}

​
* (multiplication)

{
  "*": [
    { "var": "_attribute:price" },
    1.1
  ]
}

​
/ (division)

{
  "/": [
    { "var": "_attribute:total_sales" },
    { "var": "_attribute:order_count" }
  ]
}

​
% (modulo)

{
  "%": [
    { "var": "_attribute:inventory_quantity" },
    2
  ]
}

​
Array operations

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map

Transforms each element in an array. 
{
  "map": [
    { "var": "_raw:raw.variants" },
    { "var": "price" }
  ]
}
Map with complex transformation: 
{
  "map": [
    { "var": "_raw:raw.variants" },
    {
      "if": [
        { "var": "available" },
        1,
        0
      ]
    }
  ]
}

​
filter

Filters an array based on a condition. 
{
  "filter": [
    { "var": "_raw:raw.variants" },
    { "var": "available" }
  ]
}
Filter with complex condition: 
{
  "filter": [
    { "var": "_raw:raw.variants" },
    {
      ">": [
        { "var": "price" },
        50
      ]
    }
  ]
}

​
reduce

Reduces an array to a single value using an accumulator. 
{
  "reduce": [
    { "var": "_raw:raw.variants" },
    {
      "+": [
        { "var": "accumulator" },
        { "var": "current" }
      ]
    },
    0
  ]
}
The reduce operation has access to:
  • accumulator - The accumulated value
  • current - The current array element
  • The third argument is the initial value for the accumulator

​
all

Returns true if all elements in an array match the condition. 
{
  "all": [
    { "var": "_raw:raw.variants" },
    { "var": "available" }
  ]
}

​
some

Returns true if any element in an array matches the condition. 
{
  "some": [
    { "var": "_raw:raw.variants" },
    {
      ">": [
        { "var": "price" },
        100
      ]
    }
  ]
}

​
none

Returns true if no elements in an array match the condition. 
{
  "none": [
    { "var": "_raw:raw.variants" },
    {
      "<": [
        { "var": "inventory_quantity" },
        0
      ]
    }
  ]
}

​
in

Checks if a value is in an array or if a substring exists in a string. Case Sensitivity Behavior:
  • String-in-array matching: Case-insensitive. When checking if a string exists in an array of strings, the comparison ignores case differences.
  • Substring-in-string matching: Case-sensitive. When checking if a substring exists within a string, the comparison is case-sensitive.
  • Non-string values: Exact matching. Numbers, booleans, and other non-string types use strict equality comparison.
Examples: Case-insensitive array matching: 
{
  "in": [
    "blue",
    ["Red", "Blue", "Green"]
  ]
}
Returns true because “blue” matches “Blue” (case-insensitive). 
{
  "in": [
    "PREMIUM",
    { "var": "_attribute:tags" }
  ]
}
Returns true if the tags array contains “premium”, “Premium”, “PREMIUM”, or any case variation. Case-sensitive substring matching: 
{
  "in": [
    "cotton",
    { "var": "_attribute:description" }
  ]
}
Returns true only if “cotton” (lowercase) appears in the description. “Cotton” or “COTTON” would not match. Exact matching for non-string values: 
{
  "in": [
    123,
    [123, 456, 789]
  ]
}
Returns true because the number 123 matches exactly. 
{
  "in": [
    "123",
    [123, 456, 789]
  ]
}
Returns false because the string “123” does not match the number 123 (different types).

​
merge

Merges multiple arrays into a single array. 
{
  "merge": [
    [1, 2, 3],
    [4, 5, 6]
  ]
}

​
String operations

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cat

Concatenates strings. 
{
  "cat": [
    { "var": "_attribute:vendor" },
    " - ",
    { "var": "_attribute:product_type" }
  ]
}

​
substr

Extracts a substring. Takes the string, start position, and optional length. 
{
  "substr": [
    { "var": "_attribute:sku" },
    0,
    3
  ]
}
Negative indices count from the end: 
{
  "substr": [
    { "var": "_attribute:title" },
    -5
  ]
}

​
Miscellaneous operations

​
missing

Returns an array of keys that are missing or have falsy values. 
{
  "missing": [
    "_attribute:title",
    "_attribute:price",
    "_attribute:vendor"
  ]
}

​
missing_some

Returns empty array if at least the specified number of keys exist. 
{
  "missing_some": [
    2,
    [
      "_attribute:published_at",
      "_attribute:created_at",
      "_attribute:updated_at"
    ]
  ]
}