Function waterfall

waterfall<T>(tasks: Task<T>[]): Promise<T>

Executes an array of Promise-returning tasks in sequence, resolving with the result of the last task. Each task runs only after the previous one resolves; if any task rejects, execution stops immediately.

Example:

const task1: Task<number> = () => Promise.resolve(1);
const task2: Task<number> = () => Promise.resolve(2);
const task3: Task<number> = () => Promise.resolve(3);

waterfall([task1, task2, task3]).then(result => {
  console.log(result); // 3 (final result from task3)
}).catch(error => {
  console.error(error); // If any task rejects, it will be caught here
});

Type Parameters

Parameters

tasks: Task<T>[]
An array of Promise-returning tasks to run in sequence.

Returns Promise<T>

A Promise that resolves with the result of the last task.

Throws

If tasks is empty.

Example

const task1: Task<string> = () => Promise.resolve('Hello');
const task2: Task<string> = () => Promise.resolve('World');

waterfall([task1, task2]).then(result => {
  console.log(result); // "World"
}).catch(error => {
  console.error(error); // In case of a rejection in any task
});