October 2023
Intermediate to advanced
1104 pages
28h 11m
English
Content preview from Professional JavaScript for Web Developers, 5th 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.
21Network Requests and Remote Resources
In 2005, Jesse James Garrett penned an online article titled “Ajax: A New Approach to Web Applications.” This article outlined a technique that he referred to as Ajax, short for Asynchronous JavaScript+XML. The technique consisted of making server requests for additional data without unloading the web page, resulting in a better user experience. Garrett explained how this technique could be used to change the traditional click-and-wait paradigm that the web had been stuck in since its inception.
The key technology pushing Ajax forward was the XMLHttpRequest (XHR) object, first invented by Microsoft and then duplicated by other browser vendors. Prior to the introduction of XHR, Ajax-style communication had to be accomplished through a number of hacks, mostly using hidden frames or iframes. XHR introduced a streamlined interface for making server requests and evaluating the responses. This allowed for asynchronous retrieval of additional information from the server, meaning that a user click didn't have to refresh the page to retrieve more data. Instead, an XHR object could be used to retrieve 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.