Function assert

assert<T>(
t: number | false | "" | 0n | T | null | undefined,
errorMessage?: string,
): asserts t is T
Type asserts that t is truthy. Throws an error with errorMessage if t is falsy.
Type Parameters
- T
Parameters
- t: number | false | "" | 0n | T | null | undefined
- OptionalerrorMessage: string
Returns asserts t is T
- Defined in assert.ts:5