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eventAggregator\n![Run Tests](https://github.com/DEGJS/eventAggregator/workflows/Run%20Tests/badge.svg)\n\nEventAggregator is a module that acts as a single source of events for objects that wish to publish and/or subscribe to events. This module was heavily inspired by Eric Elliot and his excellent book [Programming JavaScript Applications](http://chimera.labs.oreilly.com/books/1234000000262/). Go read it.\n\n## Install\nInstall eventAggregator from NPM with command:\n```\n$ npm install @degjs/event-aggregator\n```\n\n\n## Usage\nEventAggregator is a singleton, so it does not need to be instantiated.\n```js\nimport eventAggregator from \"@degjs/event-aggregator\";\n\nfunction onSomeEvent(e) {\n    console.log(e);\n}\n\n/* Subscribe to 'someEvent' event */\neventAggregator.subscribe('someEvent', onSomeEvent);\n\n/* Unsubscribe from 'someEvent' event */\neventAggregator.unsubscribe('someEvent', onSomeEvent);\n\n/* Publish 'yetAnotherEvent' event */\neventAggregator.publish({\n    /* type property is required */\n    type: 'yetAnotherEvent',\n    data: {...}\n});\n```\n\n## Methods\n\n### .subscribe(eventType, listener)\nSubscribe to an event.\n#### eventType\nType: `String`\nThe name of the event to subscribe to.\n\n#### listener\nType: `Function`\nThe listener function that will be called when the event is fired.\n\n### .unsubscribe(eventType, listener)\nUnsubscribe from an event.\n#### eventType\nType: `String`\nThe name of the event to unsubscribe from.\n\n#### listener\nType: `Function`\nThe listener function that was subscribed to the event.\n\n### .publish(evt)\nPublish an event.\n#### evt\nType: `Object` or `String`\nThe event to publish. If the parameter is a `String`, it should be the name of the event. If the parameter is an `Object`, it must have a `type` property with a value that is the name of the event. Any other properties on the object will be passed along to all subscribers of the event.   \n\n## Browser Support\n\nBreakpoints depends on the following browser APIs:\n+ [Array.indexOf](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf)\n+ [Array.forEach](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach)\n+ [Array.isArray](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray)\n\nTo support legacy browsers, you'll need to include polyfills for the above APIs.","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdegjs%2Feventaggregator","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdegjs%2Feventaggregator","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdegjs%2Feventaggregator/lists"}