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awaitqueue
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JavaScript utility to enqueue asynchronous tasks and run them sequentially one after another. For Node.js and the browser.
$ npm install awaitqueue
import {
AwaitQueue,
AwaitQueueTask,
AwaitQueueTaskDump,
AwaitQueueStoppedError,
AwaitQueueRemovedTaskError
} from 'awaitqueue';
const {
AwaitQueue,
AwaitQueueTask,
AwaitQueueTaskDump,
AwaitQueueStoppedError,
AwaitQueueRemovedTaskError
} = require('awaitqueue');
type AwaitQueueTask
type AwaitQueueTask<T> = () => (T | PromiseLike<T>);
TypeScript type representing a function that returns a value T
or a Promise that resolves with T
.
type AwaitQueueTaskDump
type AwaitQueueTaskDump =
{
idx: number;
task: AwaitQueueTask<unknown>;
name?: string;
enqueuedTime: number;
executionTime: number;
};
TypeScript type representing an item in the array returned by the awaitQueue.dump()
method.
idx
: Index of the pending task in the queue (0 means the task being processed now).task
: The function to be executed.name
: The name of the given function
(if any) or the name
argument given to awaitQueue.push()
method (if any).enqueuedTime
: Time in milliseconds since the task was enqueued, this is, since awaitQueue.push()
was called until its execution started or until now if not yet started.executionTime
: Time in milliseconds since the task execution started (or 0 if not yet started).new AwaitQueue()
Creates an AwaitQueue
instance.
awaitQueue.size: number
Number of enqueued pending tasks.
async awaitQueue.push(task: AwaitQueueTask<T>, name?: string): Promise<T>
Accepts a task as argument and enqueues it after pending tasks. Once processed, the push()
method resolves (or rejects) with the result returned by the given task.
@param task
: Asynchronous or asynchronous function.@param name
: Optional task name (useful for awaitQueue.dump()
method).awaitQueue.stop(): void
Make pending tasks reject with an instance of AwaitQueueStoppedError
. The AwaitQueue
instance is still usable for future tasks added via push()
method.
awaitQueue.remove(taskIdx: number): void
Removes the pending task with given index. The task is rejected with an instance of AwaitQueueRemovedTaskError
.
@param taskIdx
: Index of the pending task to be removed.awaitQueue.dump(): AwaitQueueTaskDump[]
Returns an array with information about pending tasks in the queue. See the AwaitQueueTaskDump
type above.
See test.ts file.
FAQs
JavaScript utility to enqueue asynchronous tasks and run them sequentially one after another
The npm package awaitqueue receives a total of 18,990 weekly downloads. As such, awaitqueue popularity was classified as popular.
We found that awaitqueue demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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