boolean

Checks that the value is a boolean, 1, 0, or one of the strings "1", "0", "true" and "false", and returns a real boolean.

Error codes: NOT_BOOLEAN, FORMAT_ERROR

Live example · edit rules or inputOpen in playground

rules

{
    subscribe: 'boolean'
}

{ subscribe: 'boolean' }

input

{
    subscribe: 'yes'
}

{ subscribe: 'yes' }

Invaliderrors

{
  "subscribe": "NOT_BOOLEAN"
}

Input	Output
true, 1, "1", "true"	true
false, 0, "0", "false"	false

Any other primitive value gives NOT_BOOLEAN. Strings are case-sensitive: "True" gives NOT_BOOLEAN.