March 2017
Intermediate to advanced
821 pages
18h 21m
English
Content preview from JavaScript: Moving to ES2015Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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EventEmitters
We discussed earlier that callbacks are great for the execution of one-off logic. EventEmitters are useful in responding to repeating events. EventEmitters fire events and include the ability to handle these events when triggered. Several important Node APIs are built on EventEmitters.
Events raised by EventEmitters are handled through listeners. A listener is a callback function associated with an event—when the event fires, its associated listener is triggered as well. The event.EventEmitter is a class that is used to provide a consistent interface to emit (trigger) and bind callbacks to events.
As a common style convention, event names are represented by a camel-cased string; however, any valid string can be used as an event name. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.