Files F102019007

index.js
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Created: Sun, Feb 16, 06:16

index.js
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	import isNode from 'detect-node';
	import BrowserMethod from './browser.js';
	import NodeMethod from './node.js';
	var USE_METHOD = isNode ? NodeMethod : BrowserMethod;
	var LISTENERS = new Set();
	var startedListening = false;

	function startListening() {
	if (startedListening) return;
	startedListening = true;
	USE_METHOD.add(runAll);
	}

	export function add(fn) {
	startListening();
	if (typeof fn !== 'function') throw new Error('Listener is no function');
	LISTENERS.add(fn);
	var addReturn = {
	remove: function remove() {
	return LISTENERS["delete"](fn);
	},
	run: function run() {
	LISTENERS["delete"](fn);
	return fn();
	}
	};
	return addReturn;
	}
	export function runAll() {
	var promises = [];
	LISTENERS.forEach(function (fn) {
	promises.push(fn());
	LISTENERS["delete"](fn);
	});
	return Promise.all(promises);
	}
	export function removeAll() {
	LISTENERS.clear();
	}
	export function getSize() {
	return LISTENERS.size;
	}
	export default {
	add: add,
	runAll: runAll,
	removeAll: removeAll,
	getSize: getSize
	};

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