April 2018
Beginner
226 pages
4h 47m
English
Content preview from JavaScript and JSON Essentials - Second Edition
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Synchronous vs. asynchronous
HTTP requests can be made in two ways; synchronously and asynchronously.
A synchronous request is a blocking request, where everything has to be done in an orderly fashion, one step after another, and where the following step has to wait until the previous one has completed its execution. Let's assume that there are four independent components on a web page when the page is loaded; if one component takes a long time during execution, the rest of the page is going to wait for it until its execution is complete. If execution fails, the page load fails too. One other example is when there is a poll and a rating component on the web page; if the user chooses to answer the poll and give a rating to fulfill these requests, ...
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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.