October 2010
Intermediate to advanced
456 pages
10h 16m
English
Content preview from ASP.NET Site Performance SecretsBecome 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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Approach 3: Loading JavaScript on demand
The JavaScript code for a page falls into two groups—code required to render the page, and code required to handle user interface events, such as button clicks. The code to render the page is used to make the page look better , and to attach event handlers to for example, buttons.
Although the rendering code needs to be loaded and executed in conjunction with the page itself, the user interface code can be loaded later, in response to a user interface event, such as a button click. That reduces the amount of code to be loaded, and therefore the time rendering of the page is blocked. It also reduces your bandwidth costs, because the user interface code is loaded only when it's actually needed.
On the other ...
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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.