February 2018
Intermediate to advanced
298 pages
8h 22m
English
Content preview from Learn ECMAScript - Second Edition
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Web and Service Workers
Let's suppose that you are building a cool web app, say, to factorize a number to two prime numbers. Now, this involves a lot of CPU-intensive work, which will block the main UI thread. The main UI thread is the traffic lane that the end user directly observes and perceives. If it seems congested (laggy) or blocked, even for a few seconds, it destroys the user experience.
This is where web workers come into the picture. Web workers can be thought of as those side-lanes available on the road where you can divert heavy and slow (CPU-intensive) trucks so that you don't block a user's shining Lamborghini on the main road (the main UI thread).
On the other hand, service workers are quite cool, too. A service worker is your ...
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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.