December 2008
Beginner
396 pages
10h 18m
English
Content preview from Learning JavaScript, 2nd EditionBecome 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.
Chapter 10. Cookies and Other Client-Side Storage Techniques
Originally, JavaScript was not intended to be used to create large and complex applications, or to communicate independently with the server. The primary way to store any information on the client was through an object known as a cookie.
Cookies are bits of data storage on the client based on key information, provided by the server, that allows JavaScript developers to persist information either during a session (until a browser is closed) or between sessions (web accesses). The original concept was that only those requests to get or write cookies associated with the web page’s domain would be given access, and therefore the information would be secure. Based on this premise, JavaScript was used to persist everything from a person’s login name and password to her shopping cart contents. It’s rare for a commercial website nowadays to not have some form of cookie implemented—whether you want it or not.
Over time, breaks in the security of cookies, as well as concerns regarding privacy, have tarnished the reputation of JavaScript cookies. Concerns about privacy in particular have led to more people turning off cookie support in their browsers. Still, cookies are very popular and, if they’re not abused, are very helpful.
However, cookies have also shown themselves to be limited, and not just for security reasons. The amount of storage and the ease of access for cookies have not stood the test of time for larger Ajax applications. ...
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.