Barrier.then() method
Signature:
then<TResult1 = void, TResult2 = never>(onfulfilled?: (() => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined): PromiseLike<TResult1 | TResult2>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| onfulfilled | (() => TResult1 | PromiseLike<TResult1>) | null | undefined | |
| onrejected | ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined |
Returns:
PromiseLike<TResult1 | TResult2>