January 2008
Intermediate to advanced
980 pages
28h 47m
English
Content preview from Ajax: The Definitive GuideBecome 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,
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Chapter 12. Errors: To Be (in Style) or Not to Be
It amazes me how little coverage the topic of errors receives in programming and web development books today. I do not mean that authors gloss over the issue of errors—these books always address the mechanics of trying and catching errors. Rather, you do not see examples that illustrate what a developer should do with an error once it has been trapped. Coverage of error handling should comprise more than just how to alert the user that an error occurred. It should also comprise understanding what errors developers should allow the user to see and what errors they need to handle behind the scenes.
The basic question is where the error originated and why it occurred. Any error due to user-provided input should be sent back to the user. It’s harder to decide what to do with errors that were caused by the application.
Error Handling on the Web
When you think about JavaScript error handling on the Web, what
immediately comes to mind? Many people think of a JavaScript alert
box, or maybe a try-catch block
within some JavaScript code. However, there is much more to error
handling in a web application than just the errors that can occur
within the JavaScript code. Web application developers must think
about errors on the client side as well as on the server side.
Web application developers, especially those who utilize Ajax, cannot simply focus on what the client does, because the domain of the web developer stretches across client and server. ...
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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.