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.
INTRODUCTION
A tech lead at Google once shared with me a compelling perspective on JavaScript: It's not really a cohesive programming language—at least not in the formal sense. The ECMA-262 specification defines JavaScript, but there is no single true implementation of it. What's more, the language is far from hermetic. It swims in a veritable ocean of adjacent specifications that govern APIs for everything that JavaScript touches: the DOM, network requests, system hardware, storage, events, files, cryptography, and hundreds of others. Web browsers and their various JavaScript engines all implement these specifications as they see fit. Chrome has Blink/V8, Firefox has Gecko/SpiderMoney, and Safari has WebKit/JavaScriptCore. Browsers will run nearly all JavaScript in a way that conforms to the specifications, but the web is littered with examples of each browser's idiosyncrasies. Therefore, JavaScript is more accurately characterized as a constellation of browser implementations.
Although web purists might insist that JavaScript should not be an integral component of web pages, they must concede that the modern web is severely diminished without it. It is not hyperbolic to say that JavaScript is virtually inescapable: Phones, computers, tablets, televisions, game consoles, smart watches, refrigerators, and even cars now feature web browsers that run JavaScript. Nearly three billion people now use a smartphone that includes a web browser. The language's vibrant community churns ...
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.