February 2018
Intermediate to advanced
298 pages
8h 22m
English
Content preview from Learn ECMAScript - Second Edition
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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.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.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.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.
async/await versus promises
Although async/await are actually promises under the hood, they help a lot by adding a ton of readability to code. On the surface level, I believe a developer should be aware of minute differences in the usage of async/await versus promises. Here's a glimpse of these:
|
async/await
|
promises
|
| Extremely clean code base | Uglier codebase with nested promises |
| Error handling with native try-catch blocks | Separate catch() method for error handling |
| Syntactic sugar for promises (built on promises) | Native implementation in standard |
| Introduced in ES8 | Introduced in ES6 |
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