Function assertNullish

assertNullish<T>(
actual: T,
reason?: string,
): asserts actual is T & (undefined | null)
Asserts that given value is nullish (null or undefined).
Type Parameters
- T
Parameters
- actual: T
  The value to check.
- Optionalreason: string
  Optional reason added to exception message when assertion fails.
Returns asserts actual is T & (undefined | null)
Throws
AssertionError when value is not nullish.
- Defined in assertNullish.ts:16