truthy

The truthy() function is a type guard that keeps only truthy values (false, 0, "", null, undefined are excluded).

Interactive example

Syntax

function truthy<
	GenericInput extends unknown,
>(
	input: GenericInput
): input is TruthyValue<GenericInput>;

Parameters

• input: Value to test.

Return value

A type guard that is true when input is truthy.

See also

• falsy - Keep only falsy values
• isType - Runtime type guard