Utility functions

Empty

The empty(value) checks if the variable exists and if the value is not “falsy”. Returns true if var does not exist or has a value that is empty or equal to zero, aka falsely. Otherwise, it returns false.

{% empty({dataField}) ? 'No value' : 'Field has value' %}

What qualifies as "falsy"?

• Anything that returns false if cast to boolean
• Empty array
• Zero as number
• Zero as string
• Empty string
• null
• false
• undefined

JSON decode

Decode JSON string to use in an expression.

{% json_decode('{"key": "value"}', true) %}

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Updated on: 04/09/2025