@oxog/delay
Version:
A comprehensive, zero-dependency delay/timeout utility library with advanced timing features
70 lines • 2.06 kB
JavaScript
import { DelayError, DelayErrorCode } from '../types/index.js';
import { createBasicDelay } from './delay.js';
export function createCancellableDelay(ms, options = {}) {
const controller = new AbortController();
let isCancelled = false;
const delayPromise = createBasicDelay(ms, {
...options,
signal: controller.signal,
});
const cancellablePromise = Object.assign(delayPromise, {
cancel() {
if (!isCancelled) {
isCancelled = true;
controller.abort();
}
},
isCancelled() {
return isCancelled;
},
});
// Handle the case where the original signal is already aborted
if (options.signal?.aborted) {
isCancelled = true;
controller.abort();
}
// Listen for abort on the original signal
options.signal?.addEventListener('abort', () => {
isCancelled = true;
controller.abort();
});
return cancellablePromise;
}
export class CancellationToken {
constructor() {
this._isCancelled = false;
this._callbacks = [];
}
get isCancelled() {
return this._isCancelled;
}
cancel() {
if (!this._isCancelled) {
this._isCancelled = true;
this._callbacks.forEach(callback => {
try {
callback();
}
catch (error) {
// Ignore callback errors to prevent one bad callback from affecting others
console.error('Error in cancellation callback:', error);
}
});
this._callbacks.length = 0;
}
}
onCancel(callback) {
if (this._isCancelled) {
callback();
}
else {
this._callbacks.push(callback);
}
}
throwIfCancelled() {
if (this._isCancelled) {
throw new DelayError('Operation was cancelled', DelayErrorCode.CANCELLED);
}
}
}
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