Luiz Costa
ac4f232e5e
This change modifies the build scripts to use --legacy-peer-deps flag when installing npm dependencies to resolve potential peer dependency conflicts during the build process. The change is applied to both bash (build.sh) and batch (build.bat) build scripts.
53 lines
2.1 KiB
JavaScript
53 lines
2.1 KiB
JavaScript
/**
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* @fileoverview A variant of EventEmitter which does not give listeners information about each other
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* @author Teddy Katz
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Typedefs
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//------------------------------------------------------------------------------
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/**
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* An event emitter
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* @typedef {Object} SafeEmitter
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* @property {(eventName: string, listenerFunc: Function) => void} on Adds a listener for a given event name
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* @property {(eventName: string, arg1?: any, arg2?: any, arg3?: any) => void} emit Emits an event with a given name.
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* This calls all the listeners that were listening for that name, with `arg1`, `arg2`, and `arg3` as arguments.
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* @property {function(): string[]} eventNames Gets the list of event names that have registered listeners.
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*/
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/**
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* Creates an object which can listen for and emit events.
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* This is similar to the EventEmitter API in Node's standard library, but it has a few differences.
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* The goal is to allow multiple modules to attach arbitrary listeners to the same emitter, without
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* letting the modules know about each other at all.
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* 1. It has no special keys like `error` and `newListener`, which would allow modules to detect when
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* another module throws an error or registers a listener.
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* 2. It calls listener functions without any `this` value. (`EventEmitter` calls listeners with a
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* `this` value of the emitter instance, which would give listeners access to other listeners.)
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* @returns {SafeEmitter} An emitter
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*/
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module.exports = () => {
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const listeners = Object.create(null);
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return Object.freeze({
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on(eventName, listener) {
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if (eventName in listeners) {
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listeners[eventName].push(listener);
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} else {
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listeners[eventName] = [listener];
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}
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},
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emit(eventName, ...args) {
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if (eventName in listeners) {
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listeners[eventName].forEach(listener => listener(...args));
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}
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},
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eventNames() {
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return Object.keys(listeners);
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}
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});
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};
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