#not helper

Tom Santiago

Updated September 22, 2025 18:43

Inverts truthiness and renders its block if the input is falsy. If the input is truthy, the {{else}} block runs.

Usage

{{#not value}}Block if falsey{{else}}Block if truthy{{/not}}

Check if a field is empty

{{#not record.empty}}Field is empty{{else}}Field has value{{/not}}

Input:

{
  "record": {
    "isEnabled": true,
    "empty": "",
    "count": 0
  }
}

Output:

Field is empty

Check if a count is zero

{{#not record.count}}No items available{{else}}Items exist{{/not}}

Input:

{ "record": { "count": 0 } }

Output:

No items available

Empty array is truthy

{{#not record.items}}No items{{else}}Items array exists{{/not}}

Input:

{ "record": { "items": [] } }

Output:

Items array exists

Evaluates based on standard JavaScript truthy/falsy rules (0, "", null, undefined, and false are falsy).
Useful for conditionally displaying fallback messages or handling missing data.
Combine with other logical helpers (#and, #or) for more complex conditions.
Evaluate using standard JavaScript truthiness rules: 0, "", null, undefined, and false are falsy; non-empty strings (including "0" and "false"), non-zero numbers, objects, and arrays (even []) are truthy.