3 examples of 'promise pending nodejs' in JavaScript

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function init(resolver) {
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	var handler = new Pending();
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	try {
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		resolver(promiseResolve, promiseReject, promiseNotify);
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	} catch (e) {
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		promiseReject(e);
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	}
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	return handler;
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	/**
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	 * Transition from pre-resolution state to post-resolution state, notifying
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	 * all listeners of the ultimate fulfillment or rejection
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	 * @param {*} x resolution value
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	 */
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	function promiseResolve (x) {
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		handler.resolve(x);
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	}
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	/**
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	 * Reject this promise with reason, which will be used verbatim
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	 * @param {Error|*} reason rejection reason, strongly suggested
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	 *   to be an Error type
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	 */
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	function promiseReject (reason) {
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		handler.reject(reason);
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	}
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	/**
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	 * Issue a progress event, notifying all progress listeners
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	 * @param {*} x progress event payload to pass to all listeners
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	 */
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	function promiseNotify (x) {
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		handler.notify(x);
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	}
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}

4
async function isPromisePending(promise) {
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    const status = await promiseStatus(promise);
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    return status === PROMISE_PENDING;
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}

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return new Promise(function promiseFn(resolve, reject) {
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  resolve(response);
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  reject('mock request failed');
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});