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hasOwn helper

Tom Santiago
Updated

The hasOwn helper checks whether the specified key is an own, enumerable property of the given object. It returns true if the property exists directly on the object (not inherited).

Usage

{{hasOwn object "key"}}

  • object (required): The context object to check

  • key (required): The property name to test (string)

Examples

Check for existing and missing properties

{{hasOwn record.config "theme"}}
{{hasOwn record.config "version"}}

Input:

{
  "record": {
    "config": {
      "theme": "dark",
      "debug": true
    }
  }
}

Output:

true
false

Conditional usage

{{#if (hasOwn record.config "debug")}}
  Debug mode enabled
{{else}}
  Debug property not found
{{/if}}

Input:

{
  "record": {
    "config": {
      "theme": "light",
      "debug": true
    }
  }
}

Output:

Debug mode enabled

Tip

  • Works only for own properties, not those inherited through prototypes.

  • Ideal for verifying optional settings or configuration fields in objects.

  • Use with #if or #unless to conditionally render sections based on property existence.