October 2019
Intermediate to advanced
1200 pages
31h 31m
English
Content preview from Professional JavaScript for Web Developers, 4th Edition
Become 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,
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.
AES2018 and ES2019
Beginning with ECMAScript 2015, the TC-39 committee moved to begin releasing a new ECMA specification each year. Doing so allows them to collect all individual proposals that are at a sufficiently advanced stage and package them as a single bundle. This packaging is of limited importance, however, as browser vendors tend to adopt proposals in a piecemeal fashion. When a proposal has reached stage 4, its behavior will not change, it is likely to be included in the next ECMAScript release, and browsers will begin adopting the proposal's features at their discretion.
The ECMAScript 2018 proposal was finalized in January 2018 and features enhancements for asynchronous iteration, the rest and spread operators, regular expressions, and promises. TC-39 maintains a GitHub repository (https://github.com/tc39/ecma262) that you can use to track the status of various proposals:
TODO FIX ASYNC ITERATIONTODO ES2019 http://exploringjs.com/es2018-es2019/toc.html
ASYNCHRONOUS ITERATION
Asynchronous execution and the iterator protocol are two extremely pervasive themes in new ECMAScript features over recent releases. Asynchronous execution involves releasing control of the execution thread to allow slow operations to finish before regaining control, and the ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.