Class ZTrileanAbstract

constructor

• new ZTrilean(): ZTrilean

• Returns ZTrilean

Static ReadonlyIndeterminate

Staticconvert

• convert(val, fallback?): trilean

• Converts from a value to a trilean value.

  This is similar to parse, but it also supports non string inputs which will be converted to a boolean.

  Parameters

  • val: any

    The value to convert.
  • fallback: trilean = false

    The fallback value in the case that val cannot be converted. This will only be used in the case that val is a string, null, or undefined.

  Returns trilean

  The trilean value of val. If val is null or undefined, then fallback is returned. If val is a string, then the return value of parse will be used. If val is a boolean, then it will be directly returned. If val is equal to Indeterminate, then Indeterminate will be returned. Otherwise, the truthy nature of value will be returned.

Staticis

• is(val): val is trilean

• Gets a value that determines if val is a trilean supported value.

  Parameters

  • val: any

    The value to test.

  Returns val is trilean

  True if val is a trilean value. False otherwise.

StaticisIndeterminate

• isIndeterminate(val): val is "indeterminate"

• Gets whether val is the indeterminate value.

  Parameters

  • val: trilean

  Returns val is "indeterminate"

Staticparse

• parse(str, fallback?): trilean

• Converts a string to a trilean value.

  Parameters

  • str: undefined | null | string

    The text to parse.
  • fallback: trilean = false

    The fallback in the case that str is not a parsable value.

  Returns trilean

  The parsed trilean value or fallback if str is not a valid trilean value.

Staticstringify

• stringify(x): string

• Converts a trilean value to a string.

  Parameters

  • x: trilean

    The value to convert.

  Returns string

  A string of true if x is true, false if x is false, and indeterminate if x is the indeterminate symbol.