October 2023
Intermediate to advanced
1104 pages
28h 11m
English
Content preview from Professional JavaScript for Web Developers, 5th 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.
INTRODUCTION
A tech lead at Google once shared with me a compelling perspective on JavaScript: It's not really a programming language. The ECMA-262 specification defines JavaScript, but there is no single true implementation of it. Web browsers and their JavaScript engines all implement this specification as they see fit. Chrome has Blink/V8, Firefox has Gecko/SpiderMonkey, and Safari has WebKit/JavaScriptCore. What's more, the language swims in an ocean of supplementary specifications that govern APIs for everything that JavaScript touches: the DOM, network requests, system hardware, storage, events, files, cryptography, and hundreds of others. Therefore, JavaScript is more accurately characterized as a constellation of ECMAScript implementations buttressed by an API buffet.
The first edition of this book was published in 2005. Microsoft was still pushing its rogue JScript, Internet Explorer had over a 90 percent browser market share, mobile browsers were in the Stone Age, and jQuery wouldn't be released for another year. At the time this fifth edition was written in 2023, major browsers have coalesced around the ECMA-262 specification, over 70 percent of Internet traffic uses a Chromium-based browser, mobile browser traffic exceeds desktop traffic, and modern web development largely comprises manipulating frameworks like React and Angular.
Most web developers would identify the release of ECMAScript 6 as JavaScript's Cambrian explosion. Pre-ES6, the language advanced in infrequent ...
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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.